diff --git a/packages/dom-event-testing-library/__tests__/index-test.internal.js b/packages/dom-event-testing-library/__tests__/index-test.internal.js
index c793b1f2b7b53..3883d9a9ba8c1 100644
--- a/packages/dom-event-testing-library/__tests__/index-test.internal.js
+++ b/packages/dom-event-testing-library/__tests__/index-test.internal.js
@@ -49,7 +49,7 @@ describe('createEventTarget', () => {
     const target = createEventTarget(node);
     expect(target.node).toEqual(node);
     expect(Object.keys(target)).toMatchInlineSnapshot(`
-      Array [
+      [
         "node",
         "blur",
         "click",
@@ -337,7 +337,7 @@ describe('createEventTarget', () => {
   test('.setBoundingClientRect()', () => {
     const target = createEventTarget(node);
     expect(node.getBoundingClientRect()).toMatchInlineSnapshot(`
-      Object {
+      {
         "bottom": 0,
         "height": 0,
         "left": 0,
@@ -350,7 +350,7 @@ describe('createEventTarget', () => {
     `);
     target.setBoundingClientRect({x: 10, y: 20, width: 100, height: 200});
     expect(node.getBoundingClientRect()).toMatchInlineSnapshot(`
-      Object {
+      {
         "bottom": 220,
         "height": 200,
         "left": 10,
diff --git a/packages/react-art/src/__tests__/__snapshots__/ReactART-test.js.snap b/packages/react-art/src/__tests__/__snapshots__/ReactART-test.js.snap
index c8c5609ad922c..7c39c18bc965f 100644
--- a/packages/react-art/src/__tests__/__snapshots__/ReactART-test.js.snap
+++ b/packages/react-art/src/__tests__/__snapshots__/ReactART-test.js.snap
@@ -3,10 +3,10 @@
 exports[`ReactARTComponents should generate a <Shape> where top radius is 0 if the sum of the top radius is greater than width 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -28,10 +28,10 @@ exports[`ReactARTComponents should generate a <Shape> where top radius is 0 if t
 exports[`ReactARTComponents should generate a <Shape> with a radius property of 0 when bottom left radius prop is negative 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -52,10 +52,10 @@ exports[`ReactARTComponents should generate a <Shape> with a radius property of
 exports[`ReactARTComponents should generate a <Shape> with a radius property of 0 when bottom right radius prop is negative 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -76,10 +76,10 @@ exports[`ReactARTComponents should generate a <Shape> with a radius property of
 exports[`ReactARTComponents should generate a <Shape> with a radius property of 0 when top left radius prop is negative 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -100,10 +100,10 @@ exports[`ReactARTComponents should generate a <Shape> with a radius property of
 exports[`ReactARTComponents should generate a <Shape> with a radius property of 0 when top right radius prop is negative 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -124,10 +124,10 @@ exports[`ReactARTComponents should generate a <Shape> with a radius property of
 exports[`ReactARTComponents should generate a <Shape> with positive height when height prop is negative 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": -50,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -148,10 +148,10 @@ exports[`ReactARTComponents should generate a <Shape> with positive height when
 exports[`ReactARTComponents should generate a <Shape> with positive width when width prop is negative 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": -50,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -172,10 +172,10 @@ exports[`ReactARTComponents should generate a <Shape> with positive width when w
 exports[`ReactARTComponents should generate a <Shape> with props for drawing the Circle 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": -10,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -197,10 +197,10 @@ exports[`ReactARTComponents should generate a <Shape> with props for drawing the
 exports[`ReactARTComponents should generate a <Shape> with props for drawing the Rectangle 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 0,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
@@ -223,10 +223,10 @@ exports[`ReactARTComponents should generate a <Shape> with props for drawing the
 exports[`ReactARTComponents should generate a <Shape> with props for drawing the Wedge 1`] = `
 <Shape
   d={
-    Object {
+    {
       "_pivotX": 0,
       "_pivotY": 50,
-      "path": Array [
+      "path": [
         [Function],
         [Function],
         [Function],
diff --git a/packages/react-devtools-shared/src/__tests__/TimelineProfiler-test.js b/packages/react-devtools-shared/src/__tests__/TimelineProfiler-test.js
index 107182bb445af..27188c5f41903 100644
--- a/packages/react-devtools-shared/src/__tests__/TimelineProfiler-test.js
+++ b/packages/react-devtools-shared/src/__tests__/TimelineProfiler-test.js
@@ -130,7 +130,7 @@ describe('Timeline profiler', () => {
       renderHelper(<div />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-2",
           "--render-start-2",
           "--render-stop",
@@ -151,7 +151,7 @@ describe('Timeline profiler', () => {
       renderRootHelper(<div />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -161,7 +161,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--render-stop",
           "--commit-start-32",
@@ -196,7 +196,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushAndYieldThrough(['Foo']);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-128",
           "--render-start-128",
           "--component-render-start-Foo",
@@ -219,7 +219,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-2",
           "--render-start-2",
           "--component-render-start-Example",
@@ -242,7 +242,7 @@ describe('Timeline profiler', () => {
 
       await fakeSuspensePromise;
       expect(clearedMarks).toMatchInlineSnapshot(`
-                Array [
+                [
                   "--suspense-resolved-0-Example",
                 ]
           `);
@@ -261,7 +261,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-2",
           "--render-start-2",
           "--component-render-start-Example",
@@ -299,7 +299,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -309,7 +309,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--component-render-stop",
@@ -331,7 +331,7 @@ describe('Timeline profiler', () => {
 
       await fakeSuspensePromise;
       expect(clearedMarks).toMatchInlineSnapshot(`
-            Array [
+            [
               "--suspense-resolved-0-Example",
             ]
         `);
@@ -350,7 +350,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -360,7 +360,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--component-render-stop",
@@ -382,7 +382,7 @@ describe('Timeline profiler', () => {
 
       await expect(fakeSuspensePromise).rejects.toThrow();
       expect(clearedMarks).toMatchInlineSnapshot(`
-                Array [
+                [
                   "--suspense-rejected-0-Example",
                 ]
           `);
@@ -402,7 +402,7 @@ describe('Timeline profiler', () => {
       renderRootHelper(<Example />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -412,7 +412,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--component-render-stop",
@@ -455,7 +455,7 @@ describe('Timeline profiler', () => {
       renderRootHelper(<Example />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -465,7 +465,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--component-render-stop",
@@ -509,7 +509,7 @@ describe('Timeline profiler', () => {
       renderRootHelper(<Example />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -529,7 +529,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--schedule-state-update-32-Example",
@@ -563,7 +563,7 @@ describe('Timeline profiler', () => {
       renderRootHelper(<Example />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -583,7 +583,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--schedule-forced-update-32-Example",
@@ -614,7 +614,7 @@ describe('Timeline profiler', () => {
       renderRootHelper(<Example />);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -624,7 +624,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-Example",
           "--component-render-stop",
@@ -670,7 +670,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushAndYield([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
           "--render-start-32",
           "--component-render-start-Example",
@@ -719,7 +719,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushAndYield([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
           "--render-start-32",
           "--component-render-start-Example",
@@ -766,7 +766,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-2",
           "--render-start-2",
           "--component-render-start-ErrorBoundary",
@@ -829,7 +829,7 @@ describe('Timeline profiler', () => {
       );
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
         ]
       `);
@@ -839,7 +839,7 @@ describe('Timeline profiler', () => {
       expect(Scheduler).toFlushUntilNextPaint([]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--render-start-32",
           "--component-render-start-ErrorBoundary",
           "--component-render-stop",
@@ -929,7 +929,7 @@ describe('Timeline profiler', () => {
       ]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-32",
           "--render-start-32",
           "--component-render-start-ComponentWithEffects",
@@ -960,7 +960,7 @@ describe('Timeline profiler', () => {
       ]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--passive-effects-start-32",
           "--component-passive-effect-mount-start-ComponentWithEffects",
           "--component-passive-effect-mount-stop",
@@ -987,7 +987,7 @@ describe('Timeline profiler', () => {
       ]);
 
       expect(clearedMarks).toMatchInlineSnapshot(`
-        Array [
+        [
           "--schedule-render-2",
           "--render-start-2",
           "--render-stop",
@@ -1021,7 +1021,7 @@ describe('Timeline profiler', () => {
         renderHelper(<div />);
 
         expect(clearedMarks).toMatchInlineSnapshot(`
-          Array [
+          [
             "--schedule-render-2",
             "--render-start-2",
             "--render-stop",
@@ -1041,7 +1041,7 @@ describe('Timeline profiler', () => {
       it('regression test DefaultLane', () => {
         renderRootHelper(<div />);
         expect(clearedMarks).toMatchInlineSnapshot(`
-          Array [
+          [
             "--schedule-render-32",
           ]
         `);
@@ -1069,7 +1069,7 @@ describe('Timeline profiler', () => {
         await Promise.resolve();
 
         expect(clearedMarks).toMatchInlineSnapshot(`
-          Array [
+          [
             "--schedule-state-update-2-App",
             "--render-start-2",
             "--component-render-start-App",
@@ -1109,7 +1109,7 @@ describe('Timeline profiler', () => {
         expect(Scheduler).toFlushAndYield([]);
 
         expect(clearedMarks).toMatchInlineSnapshot(`
-          Array [
+          [
             "--schedule-state-update-8-App",
             "--render-start-8",
             "--component-render-start-App",
@@ -1189,8 +1189,8 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000000010",
               "timestamp": 10,
               "type": "schedule-render",
@@ -1205,8 +1205,8 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
@@ -1243,8 +1243,8 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1253,7 +1253,7 @@ describe('Timeline profiler', () => {
               "type": "schedule-state-update",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1262,7 +1262,7 @@ describe('Timeline profiler', () => {
               "type": "schedule-state-update",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1271,7 +1271,7 @@ describe('Timeline profiler', () => {
               "type": "schedule-state-update",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1283,15 +1283,15 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 0,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
@@ -1369,7 +1369,7 @@ describe('Timeline profiler', () => {
         expect(timelineData.suspenseEvents).toHaveLength(1);
         const suspenseEvent = timelineData.suspenseEvents[0];
         expect(suspenseEvent).toMatchInlineSnapshot(`
-          Object {
+          {
             "componentName": "Example",
             "depth": 0,
             "duration": 10,
@@ -1427,7 +1427,7 @@ describe('Timeline profiler', () => {
         expect(timelineData.suspenseEvents).toHaveLength(1);
         const suspenseEvent = timelineData.suspenseEvents[0];
         expect(suspenseEvent).toMatchInlineSnapshot(`
-          Object {
+          {
             "componentName": "Example",
             "depth": 0,
             "duration": 10,
@@ -1485,7 +1485,7 @@ describe('Timeline profiler', () => {
         expect(timelineData.suspenseEvents).toHaveLength(1);
         const suspenseEvent = timelineData.suspenseEvents[0];
         expect(suspenseEvent).toMatchInlineSnapshot(`
-          Object {
+          {
             "componentName": "Example",
             "depth": 0,
             "duration": 10,
@@ -1543,7 +1543,7 @@ describe('Timeline profiler', () => {
         expect(timelineData.suspenseEvents).toHaveLength(1);
         const suspenseEvent = timelineData.suspenseEvents[0];
         expect(suspenseEvent).toMatchInlineSnapshot(`
-          Object {
+          {
             "componentName": "Example",
             "depth": 0,
             "duration": 10,
@@ -1584,15 +1584,15 @@ describe('Timeline profiler', () => {
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(2);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 20,
@@ -1602,14 +1602,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1643,15 +1643,15 @@ describe('Timeline profiler', () => {
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(2);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 20,
@@ -1661,14 +1661,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "lanes": "0b0000000000000000000000000000010",
               "timestamp": 20,
@@ -1711,15 +1711,15 @@ describe('Timeline profiler', () => {
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(2);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 20,
@@ -1729,14 +1729,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1780,15 +1780,15 @@ describe('Timeline profiler', () => {
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(2);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 20,
@@ -1798,14 +1798,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 20,
@@ -1835,22 +1835,22 @@ describe('Timeline profiler', () => {
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(2);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 1,
               "timestamp": 20,
               "type": "layout-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 21,
@@ -1860,14 +1860,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1898,22 +1898,22 @@ describe('Timeline profiler', () => {
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(2);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 1,
               "timestamp": 20,
               "type": "passive-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "duration": 10,
               "timestamp": 21,
@@ -1923,14 +1923,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -1961,8 +1961,8 @@ describe('Timeline profiler', () => {
         // Render phase updates should be retried as part of the same batch.
         expect(timelineData.batchUIDToMeasuresMap.size).toBe(1);
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "Example",
               "duration": 20,
               "timestamp": 10,
@@ -1972,14 +1972,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Example",
               "componentStack": "
               in Example (at **)",
@@ -2031,22 +2031,22 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "ErrorBoundary",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ExampleThatThrows",
               "duration": 0,
               "timestamp": 20,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ErrorBoundary",
               "duration": 10,
               "timestamp": 20,
@@ -2056,14 +2056,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000000010",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ErrorBoundary",
               "componentStack": "
               in ErrorBoundary (at **)",
@@ -2075,8 +2075,8 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.thrownErrors).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "ExampleThatThrows",
               "message": "Expected error",
               "phase": "mount",
@@ -2130,36 +2130,36 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "ErrorBoundary",
               "duration": 10,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ExampleThatThrows",
               "duration": 0,
               "timestamp": 20,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ErrorBoundary",
               "duration": 10,
               "timestamp": 20,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ExampleThatThrows",
               "duration": 0,
               "timestamp": 30,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ErrorBoundary",
               "duration": 10,
               "timestamp": 30,
@@ -2169,14 +2169,14 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ErrorBoundary",
               "componentStack": "
               in ErrorBoundary (at **)",
@@ -2188,15 +2188,15 @@ describe('Timeline profiler', () => {
           ]
         `);
         expect(timelineData.thrownErrors).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "ExampleThatThrows",
               "message": "Expected error",
               "phase": "mount",
               "timestamp": 20,
               "type": "thrown-error",
             },
-            Object {
+            {
               "componentName": "ExampleThatThrows",
               "message": "Expected error",
               "phase": "mount",
@@ -2274,78 +2274,78 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.componentMeasures).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "layout-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "layout-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "passive-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "passive-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "passive-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "layout-effect-unmount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "layout-effect-unmount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "passive-effect-unmount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
               "type": "passive-effect-unmount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "ComponentWithEffects",
               "duration": 0,
               "timestamp": 10,
@@ -2356,8 +2356,8 @@ describe('Timeline profiler', () => {
         `);
         expect(timelineData.batchUIDToMeasuresMap).toMatchInlineSnapshot(`
           Map {
-            1 => Array [
-              Object {
+            1 => [
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2365,7 +2365,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2373,7 +2373,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2381,7 +2381,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 1,
                 "duration": 0,
@@ -2389,7 +2389,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "layout-effects",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2398,8 +2398,8 @@ describe('Timeline profiler', () => {
                 "type": "passive-effects",
               },
             ],
-            2 => Array [
-              Object {
+            2 => [
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2407,7 +2407,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2415,7 +2415,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2423,7 +2423,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 1,
                 "duration": 0,
@@ -2431,7 +2431,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "layout-effects",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 1,
                 "duration": 0,
@@ -2469,14 +2469,14 @@ describe('Timeline profiler', () => {
 
         const timelineData = stopProfilingAndGetTimelineData();
         expect(timelineData.schedulingEvents).toMatchInlineSnapshot(`
-          Array [
-            Object {
+          [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "Child",
               "componentStack": "
               in Child (at **)
diff --git a/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js b/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js
index 39c515d985ec1..3a5a82bf287bc 100644
--- a/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js
+++ b/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js
@@ -186,12 +186,12 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
+      {
         "context": null,
         "events": undefined,
-        "hooks": Array [
-          Object {
-            "hookSource": Object {
+        "hooks": [
+          {
+            "hookSource": {
               "columnNumber": "removed by Jest serializer",
               "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
               "functionName": "Example",
@@ -200,13 +200,13 @@ describe('InspectedElement', () => {
             "id": 0,
             "isStateEditable": true,
             "name": "State",
-            "subHooks": Array [],
+            "subHooks": [],
             "value": 1,
           },
         ],
         "id": 2,
         "owners": null,
-        "props": Object {
+        "props": {
           "a": 1,
           "b": "abc",
         },
@@ -330,7 +330,7 @@ describe('InspectedElement', () => {
 
     let inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "a": 1,
         "b": "abc",
       }
@@ -353,7 +353,7 @@ describe('InspectedElement', () => {
 
     inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "a": 2,
         "b": "def",
       }
@@ -386,7 +386,7 @@ describe('InspectedElement', () => {
     let inspectedElement = await inspectElementAtIndex(1);
     expect(targetRenderCount).toBe(1);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "a": 1,
         "b": "abc",
       }
@@ -416,7 +416,7 @@ describe('InspectedElement', () => {
     inspectedElement = await inspectElementAtIndex(1);
     expect(targetRenderCount).toBe(2);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "a": 2,
         "b": "def",
       }
@@ -450,7 +450,7 @@ describe('InspectedElement', () => {
     let inspectedElement = await inspectElementAtIndex(1);
     expect(targetRenderCount).toBe(1);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "a": 1,
         "b": "abc",
       }
@@ -557,7 +557,7 @@ describe('InspectedElement', () => {
     const inspectedElement = await inspectElementAtIndex(0);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "boolean_false": false,
         "boolean_true": true,
         "float": 1.23,
@@ -657,7 +657,7 @@ describe('InspectedElement', () => {
     const inspectedElement = await inspectElementAtIndex(0);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "anonymous_fn": Dehydrated {
           "preview_short": ƒ () {},
           "preview_long": ƒ () {},
@@ -666,7 +666,7 @@ describe('InspectedElement', () => {
           "preview_short": ArrayBuffer(3),
           "preview_long": ArrayBuffer(3),
         },
-        "array_of_arrays": Array [
+        "array_of_arrays": [
           Dehydrated {
             "preview_short": Array(2),
             "preview_long": [Array(3), Array(0)],
@@ -696,7 +696,7 @@ describe('InspectedElement', () => {
           "preview_short": <div />,
           "preview_long": <div />,
         },
-        "immutable": Object {
+        "immutable": {
           "0": Dehydrated {
             "preview_short": Array(2),
             "preview_long": ["a", List(3)],
@@ -710,7 +710,7 @@ describe('InspectedElement', () => {
             "preview_long": ["c", Map(2)],
           },
         },
-        "map": Object {
+        "map": {
           "0": Dehydrated {
             "preview_short": Array(2),
             "preview_long": ["name", "Brian"],
@@ -720,7 +720,7 @@ describe('InspectedElement', () => {
             "preview_long": ["food", "sushi"],
           },
         },
-        "map_of_maps": Object {
+        "map_of_maps": {
           "0": Dehydrated {
             "preview_short": Array(2),
             "preview_long": ["first", Map(2)],
@@ -730,13 +730,13 @@ describe('InspectedElement', () => {
             "preview_long": ["second", Map(2)],
           },
         },
-        "object_of_objects": Object {
+        "object_of_objects": {
           "inner": Dehydrated {
             "preview_short": {…},
             "preview_long": {boolean: true, number: 123, string: "abc"},
           },
         },
-        "object_with_symbol": Object {
+        "object_with_symbol": {
           "Symbol(name)": "hello",
         },
         "proxy": Dehydrated {
@@ -751,11 +751,11 @@ describe('InspectedElement', () => {
           "preview_short": /abc/giu,
           "preview_long": /abc/giu,
         },
-        "set": Object {
+        "set": {
           "0": "abc",
           "1": 123,
         },
-        "set_of_sets": Object {
+        "set_of_sets": {
           "0": Dehydrated {
             "preview_short": Set(3),
             "preview_long": Set(3) {"a", "b", "c"},
@@ -769,7 +769,7 @@ describe('InspectedElement', () => {
           "preview_short": Symbol(symbol),
           "preview_long": Symbol(symbol),
         },
-        "typed_array": Object {
+        "typed_array": {
           "0": 100,
           "1": -100,
           "2": 0,
@@ -794,7 +794,7 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "prop": Dehydrated {
           "preview_short": Generator,
           "preview_long": Generator,
@@ -818,8 +818,8 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "object": Object {
+      {
+        "object": {
           "boolean": true,
           "number": 123,
           "string": "abc",
@@ -844,8 +844,8 @@ describe('InspectedElement', () => {
     const inspectedElement = await inspectElementAtIndex(0);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "object": Object {
+      {
+        "object": {
           "hasOwnProperty": true,
           "name": "blah",
         },
@@ -880,8 +880,8 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "data": Object {
+      {
+        "data": {
           "_number": 42,
           "number": 42,
         },
@@ -959,8 +959,8 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "object": Object {
+      {
+        "object": {
           "123": 3,
           "Symbol(enumerableSymbol)": 3,
           "Symbol(enumerableSymbolBase)": 1,
@@ -1014,8 +1014,8 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "data": Object {
+      {
+        "data": {
           "a": undefined,
           "b": Infinity,
           "c": NaN,
@@ -1080,8 +1080,8 @@ describe('InspectedElement', () => {
     }
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
+      {
+        "nestedObject": {
           "a": Dehydrated {
             "preview_short": {…},
             "preview_long": {b: {…}},
@@ -1093,10 +1093,10 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'a']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "c": Dehydrated {
                 "preview_short": Array(1),
                 "preview_long": [{…}],
@@ -1110,12 +1110,12 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'a', 'b', 'c']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
-              "c": Array [
-                Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
+              "c": [
+                {
                   "d": Dehydrated {
                     "preview_short": {…},
                     "preview_long": {e: {…}},
@@ -1131,14 +1131,14 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'a', 'b', 'c', 0, 'd']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
-              "c": Array [
-                Object {
-                  "d": Object {
-                    "e": Object {},
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
+              "c": [
+                {
+                  "d": {
+                    "e": {},
                   },
                 },
               ],
@@ -1151,9 +1151,9 @@ describe('InspectedElement', () => {
     await loadPath(['hooks', 0, 'value']);
 
     expect(inspectedElement.hooks).toMatchInlineSnapshot(`
-      Array [
-        Object {
-          "hookSource": Object {
+      [
+        {
+          "hookSource": {
             "columnNumber": "removed by Jest serializer",
             "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
             "functionName": "Example",
@@ -1162,9 +1162,9 @@ describe('InspectedElement', () => {
           "id": 0,
           "isStateEditable": true,
           "name": "State",
-          "subHooks": Array [],
-          "value": Object {
-            "foo": Object {
+          "subHooks": [],
+          "value": {
+            "foo": {
               "bar": Dehydrated {
                 "preview_short": {…},
                 "preview_long": {baz: "hi"},
@@ -1178,9 +1178,9 @@ describe('InspectedElement', () => {
     await loadPath(['hooks', 0, 'value', 'foo', 'bar']);
 
     expect(inspectedElement.hooks).toMatchInlineSnapshot(`
-      Array [
-        Object {
-          "hookSource": Object {
+      [
+        {
+          "hookSource": {
             "columnNumber": "removed by Jest serializer",
             "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
             "functionName": "Example",
@@ -1189,10 +1189,10 @@ describe('InspectedElement', () => {
           "id": 0,
           "isStateEditable": true,
           "name": "State",
-          "subHooks": Array [],
-          "value": Object {
-            "foo": Object {
-              "bar": Object {
+          "subHooks": [],
+          "value": {
+            "foo": {
+              "bar": {
                 "baz": "hi",
               },
             },
@@ -1235,8 +1235,8 @@ describe('InspectedElement', () => {
     }
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "set_of_sets": Object {
+      {
+        "set_of_sets": {
           "0": Dehydrated {
             "preview_short": Set(3),
             "preview_long": Set(3) {1, 2, 3},
@@ -1252,9 +1252,9 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'set_of_sets', 0]);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "set_of_sets": Object {
-          "0": Object {
+      {
+        "set_of_sets": {
+          "0": {
             "0": 1,
             "1": 2,
             "2": 3,
@@ -1317,8 +1317,8 @@ describe('InspectedElement', () => {
     }
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
+      {
+        "nestedObject": {
           "a": Dehydrated {
             "preview_short": {…},
             "preview_long": {b: {…}, value: 1},
@@ -1334,10 +1334,10 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'a']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "value": 1,
             },
             "value": 1,
@@ -1353,16 +1353,16 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'c']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "value": 1,
             },
             "value": 1,
           },
-          "c": Object {
-            "d": Object {
+          "c": {
+            "d": {
               "e": Dehydrated {
                 "preview_short": {…},
                 "preview_long": {value: 1},
@@ -1408,16 +1408,16 @@ describe('InspectedElement', () => {
     inspectedElement = await inspectElementAtIndex(0);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "value": 2,
             },
             "value": 2,
           },
-          "c": Object {
-            "d": Object {
+          "c": {
+            "d": {
               "e": Dehydrated {
                 "preview_short": {…},
                 "preview_long": {value: 2},
@@ -1480,8 +1480,8 @@ describe('InspectedElement', () => {
     }
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
+      {
+        "nestedObject": {
           "a": Dehydrated {
             "preview_short": {…},
             "preview_long": {b: {…}, value: 1},
@@ -1497,10 +1497,10 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'a']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "value": 1,
             },
             "value": 1,
@@ -1543,16 +1543,16 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'c']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "value": 2,
             },
             "value": 2,
           },
-          "c": Object {
-            "d": Object {
+          "c": {
+            "d": {
               "e": Dehydrated {
                 "preview_short": {…},
                 "preview_long": {value: 2},
@@ -1607,8 +1607,8 @@ describe('InspectedElement', () => {
     }
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
+      {
+        "nestedObject": {
           "a": Dehydrated {
             "preview_short": {…},
             "preview_long": {b: {…}, value: 1},
@@ -1638,10 +1638,10 @@ describe('InspectedElement', () => {
     await loadPath(['props', 'nestedObject', 'a']);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "value": 2,
             },
             "value": 2,
@@ -1666,12 +1666,12 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
+      {
         "context": null,
         "events": undefined,
-        "hooks": Array [
-          Object {
-            "hookSource": Object {
+        "hooks": [
+          {
+            "hookSource": {
               "columnNumber": "removed by Jest serializer",
               "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
               "functionName": "Example",
@@ -1680,13 +1680,13 @@ describe('InspectedElement', () => {
             "id": null,
             "isStateEditable": false,
             "name": "Context",
-            "subHooks": Array [],
+            "subHooks": [],
             "value": true,
           },
         ],
         "id": 2,
         "owners": null,
-        "props": Object {
+        "props": {
           "a": 1,
           "b": "abc",
         },
@@ -1930,9 +1930,9 @@ describe('InspectedElement', () => {
 
     const {hooks} = await inspectElementAtIndex(0);
     expect(hooks).toMatchInlineSnapshot(`
-      Array [
-        Object {
-          "hookSource": Object {
+      [
+        {
+          "hookSource": {
             "columnNumber": "removed by Jest serializer",
             "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
             "functionName": "DisplayedComplexValue",
@@ -1941,9 +1941,9 @@ describe('InspectedElement', () => {
           "id": null,
           "isStateEditable": false,
           "name": "DebuggableHook",
-          "subHooks": Array [
-            Object {
-              "hookSource": Object {
+          "subHooks": [
+            {
+              "hookSource": {
                 "columnNumber": "removed by Jest serializer",
                 "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
                 "functionName": "useDebuggableHook",
@@ -1952,11 +1952,11 @@ describe('InspectedElement', () => {
               "id": 0,
               "isStateEditable": true,
               "name": "State",
-              "subHooks": Array [],
+              "subHooks": [],
               "value": 1,
             },
           ],
-          "value": Object {
+          "value": {
             "foo": 2,
           },
         },
@@ -1985,8 +1985,8 @@ describe('InspectedElement', () => {
     const inspectedElement = await inspectElementAtIndex(0);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "proxy": Object {
+      {
+        "proxy": {
           "$$typeof": Dehydrated {
             "preview_short": ƒ () {},
             "preview_long": ƒ () {},
@@ -2014,13 +2014,13 @@ describe('InspectedElement', () => {
     // Select/inspect element
     let inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
+      {
         "context": null,
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {},
+        "props": {},
         "rootType": "render()",
         "state": null,
       }
@@ -2052,13 +2052,13 @@ describe('InspectedElement', () => {
     // Select/inspect the same element again
     inspectedElement = await inspectElementAtIndex(0);
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
+      {
         "context": null,
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {},
+        "props": {},
         "rootType": "render()",
         "state": null,
       }
@@ -2166,10 +2166,10 @@ describe('InspectedElement', () => {
       await inspectElementAtIndex(0);
 
       expect(global.$r).toMatchInlineSnapshot(`
-        Object {
-          "hooks": Array [
-            Object {
-              "hookSource": Object {
+        {
+          "hooks": [
+            {
+              "hookSource": {
                 "columnNumber": "removed by Jest serializer",
                 "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
                 "functionName": "Example",
@@ -2178,11 +2178,11 @@ describe('InspectedElement', () => {
               "id": 0,
               "isStateEditable": true,
               "name": "State",
-              "subHooks": Array [],
+              "subHooks": [],
               "value": 1,
             },
           ],
-          "props": Object {
+          "props": {
             "a": 1,
             "b": "abc",
           },
@@ -2205,10 +2205,10 @@ describe('InspectedElement', () => {
       await inspectElementAtIndex(0);
 
       expect(global.$r).toMatchInlineSnapshot(`
-        Object {
-          "hooks": Array [
-            Object {
-              "hookSource": Object {
+        {
+          "hooks": [
+            {
+              "hookSource": {
                 "columnNumber": "removed by Jest serializer",
                 "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
                 "functionName": "Example",
@@ -2217,11 +2217,11 @@ describe('InspectedElement', () => {
               "id": 0,
               "isStateEditable": true,
               "name": "State",
-              "subHooks": Array [],
+              "subHooks": [],
               "value": 1,
             },
           ],
-          "props": Object {
+          "props": {
             "a": 1,
             "b": "abc",
           },
@@ -2244,10 +2244,10 @@ describe('InspectedElement', () => {
       await inspectElementAtIndex(0);
 
       expect(global.$r).toMatchInlineSnapshot(`
-        Object {
-          "hooks": Array [
-            Object {
-              "hookSource": Object {
+        {
+          "hooks": [
+            {
+              "hookSource": {
                 "columnNumber": "removed by Jest serializer",
                 "fileName": "react-devtools-shared/src/__tests__/inspectedElement-test.js",
                 "functionName": "Example",
@@ -2256,11 +2256,11 @@ describe('InspectedElement', () => {
               "id": 0,
               "isStateEditable": true,
               "name": "State",
-              "subHooks": Array [],
+              "subHooks": [],
               "value": 1,
             },
           ],
-          "props": Object {
+          "props": {
             "a": 1,
             "b": "abc",
           },
@@ -2287,13 +2287,13 @@ describe('InspectedElement', () => {
       await inspectElementAtIndex(0);
 
       expect(global.$r.props).toMatchInlineSnapshot(`
-              Object {
+              {
                 "a": 1,
                 "b": "abc",
               }
             `);
       expect(global.$r.state).toMatchInlineSnapshot(`
-              Object {
+              {
                 "count": 0,
               }
             `);
@@ -2354,15 +2354,15 @@ describe('InspectedElement', () => {
 
       const data = await getErrorsAndWarningsForElementAtIndex(0);
       expect(data).toMatchInlineSnapshot(`
-        Object {
-          "errors": Array [
-            Array [
+        {
+          "errors": [
+            [
               "test-only: render error",
               1,
             ],
           ],
-          "warnings": Array [
-            Array [
+          "warnings": [
+            [
               "test-only: render warning",
               1,
             ],
@@ -2389,15 +2389,15 @@ describe('InspectedElement', () => {
       });
       const data = await getErrorsAndWarningsForElementAtIndex(0);
       expect(data).toMatchInlineSnapshot(`
-        Object {
-          "errors": Array [
-            Array [
+        {
+          "errors": [
+            [
               "test-only: render error",
               2,
             ],
           ],
-          "warnings": Array [
-            Array [
+          "warnings": [
+            [
               "test-only: render warning",
               3,
             ],
@@ -2426,15 +2426,15 @@ describe('InspectedElement', () => {
 
       const data = await getErrorsAndWarningsForElementAtIndex(0);
       expect(data).toMatchInlineSnapshot(`
-        Object {
-          "errors": Array [
-            Array [
+        {
+          "errors": [
+            [
               "test-only: useLayoutEffect error",
               1,
             ],
           ],
-          "warnings": Array [
-            Array [
+          "warnings": [
+            [
               "test-only: useLayoutEffect warning",
               1,
             ],
@@ -2463,15 +2463,15 @@ describe('InspectedElement', () => {
 
       const data = await getErrorsAndWarningsForElementAtIndex(0);
       expect(data).toMatchInlineSnapshot(`
-        Object {
-          "errors": Array [
-            Array [
+        {
+          "errors": [
+            [
               "test-only: useEffect error",
               1,
             ],
           ],
-          "warnings": Array [
-            Array [
+          "warnings": [
+            [
               "test-only: useEffect warning",
               1,
             ],
@@ -2497,15 +2497,15 @@ describe('InspectedElement', () => {
 
       const data = await getErrorsAndWarningsForElementAtIndex(0);
       expect(data).toMatchInlineSnapshot(`
-        Object {
-          "errors": Array [
-            Array [
+        {
+          "errors": [
+            [
               "Warning: Each child in a list should have a unique "key" prop. See https://reactjs.org/link/warning-keys for more information.
             at Example",
               1,
             ],
           ],
-          "warnings": Array [],
+          "warnings": [],
         }
       `);
     });
@@ -2534,9 +2534,9 @@ describe('InspectedElement', () => {
 
       const data = await getErrorsAndWarningsForElementAtIndex(0);
       expect(data).toMatchInlineSnapshot(`
-        Object {
-          "errors": Array [],
-          "warnings": Array [],
+        {
+          "errors": [],
+          "warnings": [],
         }
       `);
     });
@@ -2577,29 +2577,29 @@ describe('InspectedElement', () => {
         await getErrorsAndWarningsForElementAtIndex(1),
       ];
       expect(data).toMatchInlineSnapshot(`
-        Array [
-          Object {
-            "errors": Array [
-              Array [
+        [
+          {
+            "errors": [
+              [
                 "test-only: render error #1",
                 1,
               ],
             ],
-            "warnings": Array [
-              Array [
+            "warnings": [
+              [
                 "test-only: render warning #1",
                 1,
               ],
             ],
           },
-          Object {
-            "errors": Array [
-              Array [
+          {
+            "errors": [
+              [
                 "test-only: render error #2",
                 1,
               ],
             ],
-            "warnings": Array [],
+            "warnings": [],
           },
         ]
       `);
@@ -2615,24 +2615,24 @@ describe('InspectedElement', () => {
         await getErrorsAndWarningsForElementAtIndex(1),
       ];
       expect(data).toMatchInlineSnapshot(`
-        Array [
-          Object {
-            "errors": Array [
-              Array [
+        [
+          {
+            "errors": [
+              [
                 "test-only: render error #1",
                 1,
               ],
             ],
-            "warnings": Array [],
+            "warnings": [],
           },
-          Object {
-            "errors": Array [
-              Array [
+          {
+            "errors": [
+              [
                 "test-only: render error #2",
                 1,
               ],
             ],
-            "warnings": Array [],
+            "warnings": [],
           },
         ]
       `);
@@ -2674,25 +2674,25 @@ describe('InspectedElement', () => {
         await getErrorsAndWarningsForElementAtIndex(1),
       ];
       expect(data).toMatchInlineSnapshot(`
-        Array [
-          Object {
-            "errors": Array [
-              Array [
+        [
+          {
+            "errors": [
+              [
                 "test-only: render error #1",
                 1,
               ],
             ],
-            "warnings": Array [
-              Array [
+            "warnings": [
+              [
                 "test-only: render warning #1",
                 1,
               ],
             ],
           },
-          Object {
-            "errors": Array [],
-            "warnings": Array [
-              Array [
+          {
+            "errors": [],
+            "warnings": [
+              [
                 "test-only: render warning #2",
                 1,
               ],
@@ -2712,20 +2712,20 @@ describe('InspectedElement', () => {
         await getErrorsAndWarningsForElementAtIndex(1),
       ];
       expect(data).toMatchInlineSnapshot(`
-        Array [
-          Object {
-            "errors": Array [],
-            "warnings": Array [
-              Array [
+        [
+          {
+            "errors": [],
+            "warnings": [
+              [
                 "test-only: render warning #1",
                 1,
               ],
             ],
           },
-          Object {
-            "errors": Array [],
-            "warnings": Array [
-              Array [
+          {
+            "errors": [],
+            "warnings": [
+              [
                 "test-only: render warning #2",
                 1,
               ],
@@ -2773,15 +2773,15 @@ describe('InspectedElement', () => {
 
     const inspectedElement = await inspectElementAtIndex(4);
     expect(inspectedElement.owners).toMatchInlineSnapshot(`
-      Array [
-        Object {
+      [
+        {
           "displayName": "Child",
           "hocDisplayNames": null,
           "id": 3,
           "key": null,
           "type": 5,
         },
-        Object {
+        {
           "displayName": "App",
           "hocDisplayNames": null,
           "id": 2,
diff --git a/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js b/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
index b89fab7c1e8c4..c6f748a30ed85 100644
--- a/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
+++ b/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
@@ -74,13 +74,13 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
-        "context": Object {},
+      {
+        "context": {},
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {
+        "props": {
           "a": 1,
           "b": "abc",
         },
@@ -117,13 +117,13 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
-        "context": Object {},
+      {
+        "context": {},
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {
+        "props": {
           "boolean_false": false,
           "boolean_true": true,
           "float": 1.23,
@@ -213,7 +213,7 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
+      {
         "anonymous_fn": Dehydrated {
           "preview_short": ƒ () {},
           "preview_long": ƒ () {},
@@ -222,7 +222,7 @@ describe('InspectedElementContext', () => {
           "preview_short": ArrayBuffer(3),
           "preview_long": ArrayBuffer(3),
         },
-        "array_of_arrays": Array [
+        "array_of_arrays": [
           Dehydrated {
             "preview_short": Array(2),
             "preview_long": [Array(3), Array(0)],
@@ -252,7 +252,7 @@ describe('InspectedElementContext', () => {
           "preview_short": <div />,
           "preview_long": <div />,
         },
-        "immutable": Object {
+        "immutable": {
           "0": Dehydrated {
             "preview_short": Array(2),
             "preview_long": ["a", List(3)],
@@ -266,7 +266,7 @@ describe('InspectedElementContext', () => {
             "preview_long": ["c", Map(2)],
           },
         },
-        "map": Object {
+        "map": {
           "0": Dehydrated {
             "preview_short": Array(2),
             "preview_long": ["name", "Brian"],
@@ -276,7 +276,7 @@ describe('InspectedElementContext', () => {
             "preview_long": ["food", "sushi"],
           },
         },
-        "map_of_maps": Object {
+        "map_of_maps": {
           "0": Dehydrated {
             "preview_short": Array(2),
             "preview_long": ["first", Map(2)],
@@ -286,7 +286,7 @@ describe('InspectedElementContext', () => {
             "preview_long": ["second", Map(2)],
           },
         },
-        "object_of_objects": Object {
+        "object_of_objects": {
           "inner": Dehydrated {
             "preview_short": {…},
             "preview_long": {boolean: true, number: 123, string: "abc"},
@@ -300,11 +300,11 @@ describe('InspectedElementContext', () => {
           "preview_short": /abc/giu,
           "preview_long": /abc/giu,
         },
-        "set": Object {
+        "set": {
           "0": "abc",
           "1": 123,
         },
-        "set_of_sets": Object {
+        "set_of_sets": {
           "0": Dehydrated {
             "preview_short": Set(3),
             "preview_long": Set(3) {"a", "b", "c"},
@@ -318,7 +318,7 @@ describe('InspectedElementContext', () => {
           "preview_short": Symbol(symbol),
           "preview_long": Symbol(symbol),
         },
-        "typed_array": Object {
+        "typed_array": {
           "0": 100,
           "1": -100,
           "2": 0,
@@ -347,8 +347,8 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "object": Object {
+      {
+        "object": {
           "boolean": true,
           "number": 123,
           "string": "abc",
@@ -404,13 +404,13 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
-        "context": Object {},
+      {
+        "context": {},
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {
+        "props": {
           "iteratable": Dehydrated {
             "preview_short": Generator,
             "preview_long": Generator,
@@ -459,14 +459,14 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
-        "context": Object {},
+      {
+        "context": {},
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {
-          "data": Object {
+        "props": {
+          "data": {
             "_number": 42,
             "number": 42,
           },
@@ -549,14 +549,14 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement).toMatchInlineSnapshot(`
-      Object {
-        "context": Object {},
+      {
+        "context": {},
         "events": undefined,
         "hooks": null,
         "id": 2,
         "owners": null,
-        "props": Object {
-          "data": Object {
+        "props": {
+          "data": {
             "123": 3,
             "Symbol(enumerableSymbol)": 3,
             "Symbol(enumerableSymbolBase)": 1,
@@ -619,8 +619,8 @@ describe('InspectedElementContext', () => {
     const inspectedElement = await read(id);
 
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "data": Object {
+      {
+        "data": {
           "a": undefined,
           "b": Infinity,
           "c": NaN,
@@ -659,8 +659,8 @@ describe('InspectedElementContext', () => {
 
     let inspectedElement = await read(id);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
+      {
+        "nestedObject": {
           "a": Dehydrated {
             "preview_short": {…},
             "preview_long": {b: {…}},
@@ -671,10 +671,10 @@ describe('InspectedElementContext', () => {
 
     inspectedElement = await read(id, ['props', 'nestedObject', 'a']);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
               "c": Dehydrated {
                 "preview_short": Array(1),
                 "preview_long": [{…}],
@@ -687,12 +687,12 @@ describe('InspectedElementContext', () => {
 
     inspectedElement = await read(id, ['props', 'nestedObject', 'a', 'b', 'c']);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
-              "c": Array [
-                Object {
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
+              "c": [
+                {
                   "d": Dehydrated {
                     "preview_short": {…},
                     "preview_long": {e: {…}},
@@ -715,14 +715,14 @@ describe('InspectedElementContext', () => {
       'd',
     ]);
     expect(inspectedElement.props).toMatchInlineSnapshot(`
-      Object {
-        "nestedObject": Object {
-          "a": Object {
-            "b": Object {
-              "c": Array [
-                Object {
-                  "d": Object {
-                    "e": Object {},
+      {
+        "nestedObject": {
+          "a": {
+            "b": {
+              "c": [
+                {
+                  "d": {
+                    "e": {},
                   },
                 },
               ],
diff --git a/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js b/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js
index dfdea1c21a1f1..0da44023c02da 100644
--- a/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js
+++ b/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js
@@ -114,14 +114,14 @@ describe('OwnersListContext', () => {
     const firstChild = ((store.getElementAtIndex(2): any): Element);
 
     expect(await getOwnersListForOwner(parent)).toMatchInlineSnapshot(`
-      Array [
+      [
         "Grandparent",
         "Parent",
       ]
     `);
 
     expect(await getOwnersListForOwner(firstChild)).toMatchInlineSnapshot(`
-      Array [
+      [
         "Grandparent",
         "Parent",
         "Child",
@@ -157,7 +157,7 @@ describe('OwnersListContext', () => {
     const firstChild = ((store.getElementAtIndex(1): any): Element);
 
     expect(await getOwnersListForOwner(firstChild)).toMatchInlineSnapshot(`
-      Array [
+      [
         "Grandparent",
         "Parent",
         "Child",
@@ -183,7 +183,7 @@ describe('OwnersListContext', () => {
     const grandparent = ((store.getElementAtIndex(0): any): Element);
 
     expect(await getOwnersListForOwner(grandparent)).toMatchInlineSnapshot(`
-      Array [
+      [
         "Grandparent",
       ]
     `);
@@ -212,7 +212,7 @@ describe('OwnersListContext', () => {
     const wrapped = ((store.getElementAtIndex(2): any): Element);
 
     expect(await getOwnersListForOwner(wrapped)).toMatchInlineSnapshot(`
-      Array [
+      [
         "Grandparent",
         "InnerComponent",
         "InnerComponent",
diff --git a/packages/react-devtools-shared/src/__tests__/preprocessData-test.js b/packages/react-devtools-shared/src/__tests__/preprocessData-test.js
index 282b33eba59ed..ff4964927c69d 100644
--- a/packages/react-devtools-shared/src/__tests__/preprocessData-test.js
+++ b/packages/react-devtools-shared/src/__tests__/preprocessData-test.js
@@ -322,11 +322,11 @@ describe('Timeline profiler', () => {
           randomSample,
         ]);
         expect(data).toMatchInlineSnapshot(`
-                Object {
+                {
                   "batchUIDToMeasuresMap": Map {},
-                  "componentMeasures": Array [],
+                  "componentMeasures": [],
                   "duration": 0.005,
-                  "flamechart": Array [],
+                  "flamechart": [],
                   "internalModuleSourceToRanges": Map {},
                   "laneToLabelMap": Map {
                     0 => "Sync",
@@ -362,48 +362,48 @@ describe('Timeline profiler', () => {
                     30 => "Offscreen",
                   },
                   "laneToReactMeasureMap": Map {
-                    0 => Array [],
-                    1 => Array [],
-                    2 => Array [],
-                    3 => Array [],
-                    4 => Array [],
-                    5 => Array [],
-                    6 => Array [],
-                    7 => Array [],
-                    8 => Array [],
-                    9 => Array [],
-                    10 => Array [],
-                    11 => Array [],
-                    12 => Array [],
-                    13 => Array [],
-                    14 => Array [],
-                    15 => Array [],
-                    16 => Array [],
-                    17 => Array [],
-                    18 => Array [],
-                    19 => Array [],
-                    20 => Array [],
-                    21 => Array [],
-                    22 => Array [],
-                    23 => Array [],
-                    24 => Array [],
-                    25 => Array [],
-                    26 => Array [],
-                    27 => Array [],
-                    28 => Array [],
-                    29 => Array [],
-                    30 => Array [],
+                    0 => [],
+                    1 => [],
+                    2 => [],
+                    3 => [],
+                    4 => [],
+                    5 => [],
+                    6 => [],
+                    7 => [],
+                    8 => [],
+                    9 => [],
+                    10 => [],
+                    11 => [],
+                    12 => [],
+                    13 => [],
+                    14 => [],
+                    15 => [],
+                    16 => [],
+                    17 => [],
+                    18 => [],
+                    19 => [],
+                    20 => [],
+                    21 => [],
+                    22 => [],
+                    23 => [],
+                    24 => [],
+                    25 => [],
+                    26 => [],
+                    27 => [],
+                    28 => [],
+                    29 => [],
+                    30 => [],
                   },
-                  "nativeEvents": Array [],
-                  "networkMeasures": Array [],
-                  "otherUserTimingMarks": Array [],
+                  "nativeEvents": [],
+                  "networkMeasures": [],
+                  "otherUserTimingMarks": [],
                   "reactVersion": "<filtered-version>",
-                  "schedulingEvents": Array [],
+                  "schedulingEvents": [],
                   "snapshotHeight": 0,
-                  "snapshots": Array [],
+                  "snapshots": [],
                   "startTime": 1,
-                  "suspenseEvents": Array [],
-                  "thrownErrors": Array [],
+                  "suspenseEvents": [],
+                  "thrownErrors": [],
                 }
           `);
       });
@@ -447,10 +447,10 @@ describe('Timeline profiler', () => {
           }),
         ]);
         expect(data).toMatchInlineSnapshot(`
-          Object {
+          {
             "batchUIDToMeasuresMap": Map {
-              0 => Array [
-                Object {
+              0 => [
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.005,
@@ -458,7 +458,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.001,
@@ -466,7 +466,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.003,
@@ -474,7 +474,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.008,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 1,
                   "duration": 0.001,
@@ -484,9 +484,9 @@ describe('Timeline profiler', () => {
                 },
               ],
             },
-            "componentMeasures": Array [],
+            "componentMeasures": [],
             "duration": 0.011,
-            "flamechart": Array [],
+            "flamechart": [],
             "internalModuleSourceToRanges": Map {},
             "laneToLabelMap": Map {
               0 => "Sync",
@@ -522,17 +522,17 @@ describe('Timeline profiler', () => {
               30 => "Offscreen",
             },
             "laneToReactMeasureMap": Map {
-              0 => Array [],
-              1 => Array [],
-              2 => Array [],
-              3 => Array [],
-              4 => Array [],
-              5 => Array [],
-              6 => Array [],
-              7 => Array [],
-              8 => Array [],
-              9 => Array [
-                Object {
+              0 => [],
+              1 => [],
+              2 => [],
+              3 => [],
+              4 => [],
+              5 => [],
+              6 => [],
+              7 => [],
+              8 => [],
+              9 => [
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.005,
@@ -540,7 +540,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.001,
@@ -548,7 +548,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.003,
@@ -556,7 +556,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.008,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 1,
                   "duration": 0.001,
@@ -565,34 +565,34 @@ describe('Timeline profiler', () => {
                   "type": "layout-effects",
                 },
               ],
-              10 => Array [],
-              11 => Array [],
-              12 => Array [],
-              13 => Array [],
-              14 => Array [],
-              15 => Array [],
-              16 => Array [],
-              17 => Array [],
-              18 => Array [],
-              19 => Array [],
-              20 => Array [],
-              21 => Array [],
-              22 => Array [],
-              23 => Array [],
-              24 => Array [],
-              25 => Array [],
-              26 => Array [],
-              27 => Array [],
-              28 => Array [],
-              29 => Array [],
-              30 => Array [],
+              10 => [],
+              11 => [],
+              12 => [],
+              13 => [],
+              14 => [],
+              15 => [],
+              16 => [],
+              17 => [],
+              18 => [],
+              19 => [],
+              20 => [],
+              21 => [],
+              22 => [],
+              23 => [],
+              24 => [],
+              25 => [],
+              26 => [],
+              27 => [],
+              28 => [],
+              29 => [],
+              30 => [],
             },
-            "nativeEvents": Array [],
-            "networkMeasures": Array [],
-            "otherUserTimingMarks": Array [],
+            "nativeEvents": [],
+            "networkMeasures": [],
+            "otherUserTimingMarks": [],
             "reactVersion": "<filtered-version>",
-            "schedulingEvents": Array [
-              Object {
+            "schedulingEvents": [
+              {
                 "lanes": "0b0000000000000000000000000001001",
                 "timestamp": 0.005,
                 "type": "schedule-render",
@@ -600,10 +600,10 @@ describe('Timeline profiler', () => {
               },
             ],
             "snapshotHeight": 0,
-            "snapshots": Array [],
+            "snapshots": [],
             "startTime": 1,
-            "suspenseEvents": Array [],
-            "thrownErrors": Array [],
+            "suspenseEvents": [],
+            "thrownErrors": [],
           }
         `);
       });
@@ -616,10 +616,10 @@ describe('Timeline profiler', () => {
           ...createUserTimingData(clearedMarks),
         ]);
         expect(data).toMatchInlineSnapshot(`
-          Object {
+          {
             "batchUIDToMeasuresMap": Map {
-              0 => Array [
-                Object {
+              0 => [
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.01,
@@ -627,7 +627,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.001,
@@ -635,7 +635,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.008,
@@ -643,7 +643,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.008,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 1,
                   "duration": 0.001,
@@ -653,19 +653,19 @@ describe('Timeline profiler', () => {
                 },
               ],
             },
-            "componentMeasures": Array [],
+            "componentMeasures": [],
             "duration": 0.016,
-            "flamechart": Array [],
+            "flamechart": [],
             "internalModuleSourceToRanges": Map {
-              undefined => Array [
-                Array [
-                  Object {
+              undefined => [
+                [
+                  {
                     "columnNumber": 0,
                     "functionName": "filtered",
                     "lineNumber": 0,
                     "source": "  at filtered (<anonymous>:0:0)",
                   },
-                  Object {
+                  {
                     "columnNumber": 1,
                     "functionName": "filtered",
                     "lineNumber": 1,
@@ -708,9 +708,9 @@ describe('Timeline profiler', () => {
               30 => "Offscreen",
             },
             "laneToReactMeasureMap": Map {
-              0 => Array [],
-              1 => Array [
-                Object {
+              0 => [],
+              1 => [
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.01,
@@ -718,7 +718,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.001,
@@ -726,7 +726,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.008,
@@ -734,7 +734,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.008,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 1,
                   "duration": 0.001,
@@ -743,42 +743,42 @@ describe('Timeline profiler', () => {
                   "type": "layout-effects",
                 },
               ],
-              2 => Array [],
-              3 => Array [],
-              4 => Array [],
-              5 => Array [],
-              6 => Array [],
-              7 => Array [],
-              8 => Array [],
-              9 => Array [],
-              10 => Array [],
-              11 => Array [],
-              12 => Array [],
-              13 => Array [],
-              14 => Array [],
-              15 => Array [],
-              16 => Array [],
-              17 => Array [],
-              18 => Array [],
-              19 => Array [],
-              20 => Array [],
-              21 => Array [],
-              22 => Array [],
-              23 => Array [],
-              24 => Array [],
-              25 => Array [],
-              26 => Array [],
-              27 => Array [],
-              28 => Array [],
-              29 => Array [],
-              30 => Array [],
+              2 => [],
+              3 => [],
+              4 => [],
+              5 => [],
+              6 => [],
+              7 => [],
+              8 => [],
+              9 => [],
+              10 => [],
+              11 => [],
+              12 => [],
+              13 => [],
+              14 => [],
+              15 => [],
+              16 => [],
+              17 => [],
+              18 => [],
+              19 => [],
+              20 => [],
+              21 => [],
+              22 => [],
+              23 => [],
+              24 => [],
+              25 => [],
+              26 => [],
+              27 => [],
+              28 => [],
+              29 => [],
+              30 => [],
             },
-            "nativeEvents": Array [],
-            "networkMeasures": Array [],
-            "otherUserTimingMarks": Array [],
+            "nativeEvents": [],
+            "networkMeasures": [],
+            "otherUserTimingMarks": [],
             "reactVersion": "<filtered-version>",
-            "schedulingEvents": Array [
-              Object {
+            "schedulingEvents": [
+              {
                 "lanes": "0b0000000000000000000000000000001",
                 "timestamp": 0.005,
                 "type": "schedule-render",
@@ -786,10 +786,10 @@ describe('Timeline profiler', () => {
               },
             ],
             "snapshotHeight": 0,
-            "snapshots": Array [],
+            "snapshots": [],
             "startTime": 4,
-            "suspenseEvents": Array [],
-            "thrownErrors": Array [],
+            "suspenseEvents": [],
+            "thrownErrors": [],
           }
         `);
       });
@@ -813,10 +813,10 @@ describe('Timeline profiler', () => {
           ...createUserTimingData(clearedMarks),
         ]);
         expect(data).toMatchInlineSnapshot(`
-          Object {
+          {
             "batchUIDToMeasuresMap": Map {
-              0 => Array [
-                Object {
+              0 => [
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.012,
@@ -824,7 +824,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.003,
@@ -832,7 +832,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.008,
@@ -840,7 +840,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.01,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 1,
                   "duration": 0.001,
@@ -848,7 +848,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.016,
                   "type": "layout-effects",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.004,
@@ -857,8 +857,8 @@ describe('Timeline profiler', () => {
                   "type": "passive-effects",
                 },
               ],
-              1 => Array [
-                Object {
+              1 => [
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.012,
@@ -866,7 +866,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.024,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.003,
@@ -874,7 +874,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.024,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.008,
@@ -882,7 +882,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.028,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 1,
                   "duration": 0.001,
@@ -890,7 +890,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.034,
                   "type": "layout-effects",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.003,
@@ -900,29 +900,29 @@ describe('Timeline profiler', () => {
                 },
               ],
             },
-            "componentMeasures": Array [
-              Object {
+            "componentMeasures": [
+              {
                 "componentName": "App",
                 "duration": 0.001,
                 "timestamp": 0.007,
                 "type": "render",
                 "warning": null,
               },
-              Object {
+              {
                 "componentName": "App",
                 "duration": 0.002,
                 "timestamp": 0.02,
                 "type": "passive-effect-mount",
                 "warning": null,
               },
-              Object {
+              {
                 "componentName": "App",
                 "duration": 0.001,
                 "timestamp": 0.025,
                 "type": "render",
                 "warning": null,
               },
-              Object {
+              {
                 "componentName": "App",
                 "duration": 0.001,
                 "timestamp": 0.038,
@@ -931,17 +931,17 @@ describe('Timeline profiler', () => {
               },
             ],
             "duration": 0.04,
-            "flamechart": Array [],
+            "flamechart": [],
             "internalModuleSourceToRanges": Map {
-              undefined => Array [
-                Array [
-                  Object {
+              undefined => [
+                [
+                  {
                     "columnNumber": 0,
                     "functionName": "filtered",
                     "lineNumber": 0,
                     "source": "  at filtered (<anonymous>:0:0)",
                   },
-                  Object {
+                  {
                     "columnNumber": 1,
                     "functionName": "filtered",
                     "lineNumber": 1,
@@ -984,13 +984,13 @@ describe('Timeline profiler', () => {
               30 => "Offscreen",
             },
             "laneToReactMeasureMap": Map {
-              0 => Array [],
-              1 => Array [],
-              2 => Array [],
-              3 => Array [],
-              4 => Array [],
-              5 => Array [
-                Object {
+              0 => [],
+              1 => [],
+              2 => [],
+              3 => [],
+              4 => [],
+              5 => [
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.012,
@@ -998,7 +998,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.003,
@@ -1006,7 +1006,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.006,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.008,
@@ -1014,7 +1014,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.01,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 1,
                   "duration": 0.001,
@@ -1022,7 +1022,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.016,
                   "type": "layout-effects",
                 },
-                Object {
+                {
                   "batchUID": 0,
                   "depth": 0,
                   "duration": 0.004,
@@ -1030,7 +1030,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.019,
                   "type": "passive-effects",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.012,
@@ -1038,7 +1038,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.024,
                   "type": "render-idle",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.003,
@@ -1046,7 +1046,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.024,
                   "type": "render",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.008,
@@ -1054,7 +1054,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.028,
                   "type": "commit",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 1,
                   "duration": 0.001,
@@ -1062,7 +1062,7 @@ describe('Timeline profiler', () => {
                   "timestamp": 0.034,
                   "type": "layout-effects",
                 },
-                Object {
+                {
                   "batchUID": 1,
                   "depth": 0,
                   "duration": 0.003,
@@ -1071,44 +1071,44 @@ describe('Timeline profiler', () => {
                   "type": "passive-effects",
                 },
               ],
-              6 => Array [],
-              7 => Array [],
-              8 => Array [],
-              9 => Array [],
-              10 => Array [],
-              11 => Array [],
-              12 => Array [],
-              13 => Array [],
-              14 => Array [],
-              15 => Array [],
-              16 => Array [],
-              17 => Array [],
-              18 => Array [],
-              19 => Array [],
-              20 => Array [],
-              21 => Array [],
-              22 => Array [],
-              23 => Array [],
-              24 => Array [],
-              25 => Array [],
-              26 => Array [],
-              27 => Array [],
-              28 => Array [],
-              29 => Array [],
-              30 => Array [],
+              6 => [],
+              7 => [],
+              8 => [],
+              9 => [],
+              10 => [],
+              11 => [],
+              12 => [],
+              13 => [],
+              14 => [],
+              15 => [],
+              16 => [],
+              17 => [],
+              18 => [],
+              19 => [],
+              20 => [],
+              21 => [],
+              22 => [],
+              23 => [],
+              24 => [],
+              25 => [],
+              26 => [],
+              27 => [],
+              28 => [],
+              29 => [],
+              30 => [],
             },
-            "nativeEvents": Array [],
-            "networkMeasures": Array [],
-            "otherUserTimingMarks": Array [],
+            "nativeEvents": [],
+            "networkMeasures": [],
+            "otherUserTimingMarks": [],
             "reactVersion": "<filtered-version>",
-            "schedulingEvents": Array [
-              Object {
+            "schedulingEvents": [
+              {
                 "lanes": "0b0000000000000000000000000000101",
                 "timestamp": 0.005,
                 "type": "schedule-render",
                 "warning": null,
               },
-              Object {
+              {
                 "componentName": "App",
                 "lanes": "0b0000000000000000000000000000101",
                 "timestamp": 0.021,
@@ -1117,10 +1117,10 @@ describe('Timeline profiler', () => {
               },
             ],
             "snapshotHeight": 0,
-            "snapshots": Array [],
+            "snapshots": [],
             "startTime": 4,
-            "suspenseEvents": Array [],
-            "thrownErrors": Array [],
+            "suspenseEvents": [],
+            "thrownErrors": [],
           }
         `);
       });
@@ -1194,16 +1194,16 @@ describe('Timeline profiler', () => {
           ...userTimingData,
         ]);
         expect(data.otherUserTimingMarks).toMatchInlineSnapshot(`
-                Array [
-                  Object {
+                [
+                  {
                     "name": "VCWithoutImage: root",
                     "timestamp": 0.003,
                   },
-                  Object {
+                  {
                     "name": "--a-mark-that-looks-like-one-of-ours",
                     "timestamp": 0.004,
                   },
-                  Object {
+                  {
                     "name": "Some other mark",
                     "timestamp": 0.005,
                   },
@@ -1948,10 +1948,10 @@ describe('Timeline profiler', () => {
       expect(data).toHaveLength(1);
       const timelineData = data[0];
       expect(timelineData).toMatchInlineSnapshot(`
-        Object {
+        {
           "batchUIDToMeasuresMap": Map {
-            1 => Array [
-              Object {
+            1 => [
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -1959,7 +1959,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -1967,7 +1967,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -1975,7 +1975,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 1,
                 "duration": 0,
@@ -1985,9 +1985,9 @@ describe('Timeline profiler', () => {
               },
             ],
           },
-          "componentMeasures": Array [],
+          "componentMeasures": [],
           "duration": 20,
-          "flamechart": Array [],
+          "flamechart": [],
           "internalModuleSourceToRanges": Map {},
           "laneToLabelMap": Map {
             1 => "SyncHydrationLane",
@@ -2023,9 +2023,9 @@ describe('Timeline profiler', () => {
             1073741824 => "Offscreen",
           },
           "laneToReactMeasureMap": Map {
-            1 => Array [],
-            2 => Array [
-              Object {
+            1 => [],
+            2 => [
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2033,7 +2033,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2041,7 +2041,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2049,7 +2049,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 1,
                 "duration": 0,
@@ -2058,42 +2058,42 @@ describe('Timeline profiler', () => {
                 "type": "layout-effects",
               },
             ],
-            4 => Array [],
-            8 => Array [],
-            16 => Array [],
-            32 => Array [],
-            64 => Array [],
-            128 => Array [],
-            256 => Array [],
-            512 => Array [],
-            1024 => Array [],
-            2048 => Array [],
-            4096 => Array [],
-            8192 => Array [],
-            16384 => Array [],
-            32768 => Array [],
-            65536 => Array [],
-            131072 => Array [],
-            262144 => Array [],
-            524288 => Array [],
-            1048576 => Array [],
-            2097152 => Array [],
-            4194304 => Array [],
-            8388608 => Array [],
-            16777216 => Array [],
-            33554432 => Array [],
-            67108864 => Array [],
-            134217728 => Array [],
-            268435456 => Array [],
-            536870912 => Array [],
-            1073741824 => Array [],
+            4 => [],
+            8 => [],
+            16 => [],
+            32 => [],
+            64 => [],
+            128 => [],
+            256 => [],
+            512 => [],
+            1024 => [],
+            2048 => [],
+            4096 => [],
+            8192 => [],
+            16384 => [],
+            32768 => [],
+            65536 => [],
+            131072 => [],
+            262144 => [],
+            524288 => [],
+            1048576 => [],
+            2097152 => [],
+            4194304 => [],
+            8388608 => [],
+            16777216 => [],
+            33554432 => [],
+            67108864 => [],
+            134217728 => [],
+            268435456 => [],
+            536870912 => [],
+            1073741824 => [],
           },
-          "nativeEvents": Array [],
-          "networkMeasures": Array [],
-          "otherUserTimingMarks": Array [],
+          "nativeEvents": [],
+          "networkMeasures": [],
+          "otherUserTimingMarks": [],
           "reactVersion": "<filtered-version>",
-          "schedulingEvents": Array [
-            Object {
+          "schedulingEvents": [
+            {
               "lanes": "0b0000000000000000000000000000010",
               "timestamp": 10,
               "type": "schedule-render",
@@ -2101,10 +2101,10 @@ describe('Timeline profiler', () => {
             },
           ],
           "snapshotHeight": 0,
-          "snapshots": Array [],
+          "snapshots": [],
           "startTime": -10,
-          "suspenseEvents": Array [],
-          "thrownErrors": Array [],
+          "suspenseEvents": [],
+          "thrownErrors": [],
         }
       `);
     });
@@ -2137,10 +2137,10 @@ describe('Timeline profiler', () => {
       });
 
       expect(timelineData).toMatchInlineSnapshot(`
-        Object {
+        {
           "batchUIDToMeasuresMap": Map {
-            1 => Array [
-              Object {
+            1 => [
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2148,7 +2148,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2156,7 +2156,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2164,7 +2164,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 1,
                 "duration": 0,
@@ -2172,7 +2172,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "layout-effects",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2181,8 +2181,8 @@ describe('Timeline profiler', () => {
                 "type": "passive-effects",
               },
             ],
-            2 => Array [
-              Object {
+            2 => [
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2190,7 +2190,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2198,7 +2198,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2206,7 +2206,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 1,
                 "duration": 0,
@@ -2214,7 +2214,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "layout-effects",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2224,29 +2224,29 @@ describe('Timeline profiler', () => {
               },
             ],
           },
-          "componentMeasures": Array [
-            Object {
+          "componentMeasures": [
+            {
               "componentName": "App",
               "duration": 0,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "App",
               "duration": 0,
               "timestamp": 10,
               "type": "passive-effect-mount",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "App",
               "duration": 0,
               "timestamp": 10,
               "type": "render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "App",
               "duration": 0,
               "timestamp": 10,
@@ -2255,7 +2255,7 @@ describe('Timeline profiler', () => {
             },
           ],
           "duration": 20,
-          "flamechart": Array [],
+          "flamechart": [],
           "internalModuleSourceToRanges": Map {},
           "laneToLabelMap": Map {
             1 => "SyncHydrationLane",
@@ -2291,13 +2291,13 @@ describe('Timeline profiler', () => {
             1073741824 => "Offscreen",
           },
           "laneToReactMeasureMap": Map {
-            1 => Array [],
-            2 => Array [],
-            4 => Array [],
-            8 => Array [],
-            16 => Array [],
-            32 => Array [
-              Object {
+            1 => [],
+            2 => [],
+            4 => [],
+            8 => [],
+            16 => [],
+            32 => [
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2305,7 +2305,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2313,7 +2313,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2321,7 +2321,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 1,
                 "duration": 0,
@@ -2329,7 +2329,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "layout-effects",
               },
-              Object {
+              {
                 "batchUID": 1,
                 "depth": 0,
                 "duration": 0,
@@ -2337,7 +2337,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "passive-effects",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2345,7 +2345,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render-idle",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2353,7 +2353,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "render",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2361,7 +2361,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "commit",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 1,
                 "duration": 0,
@@ -2369,7 +2369,7 @@ describe('Timeline profiler', () => {
                 "timestamp": 10,
                 "type": "layout-effects",
               },
-              Object {
+              {
                 "batchUID": 2,
                 "depth": 0,
                 "duration": 0,
@@ -2378,44 +2378,44 @@ describe('Timeline profiler', () => {
                 "type": "passive-effects",
               },
             ],
-            64 => Array [],
-            128 => Array [],
-            256 => Array [],
-            512 => Array [],
-            1024 => Array [],
-            2048 => Array [],
-            4096 => Array [],
-            8192 => Array [],
-            16384 => Array [],
-            32768 => Array [],
-            65536 => Array [],
-            131072 => Array [],
-            262144 => Array [],
-            524288 => Array [],
-            1048576 => Array [],
-            2097152 => Array [],
-            4194304 => Array [],
-            8388608 => Array [],
-            16777216 => Array [],
-            33554432 => Array [],
-            67108864 => Array [],
-            134217728 => Array [],
-            268435456 => Array [],
-            536870912 => Array [],
-            1073741824 => Array [],
+            64 => [],
+            128 => [],
+            256 => [],
+            512 => [],
+            1024 => [],
+            2048 => [],
+            4096 => [],
+            8192 => [],
+            16384 => [],
+            32768 => [],
+            65536 => [],
+            131072 => [],
+            262144 => [],
+            524288 => [],
+            1048576 => [],
+            2097152 => [],
+            4194304 => [],
+            8388608 => [],
+            16777216 => [],
+            33554432 => [],
+            67108864 => [],
+            134217728 => [],
+            268435456 => [],
+            536870912 => [],
+            1073741824 => [],
           },
-          "nativeEvents": Array [],
-          "networkMeasures": Array [],
-          "otherUserTimingMarks": Array [],
+          "nativeEvents": [],
+          "networkMeasures": [],
+          "otherUserTimingMarks": [],
           "reactVersion": "<filtered-version>",
-          "schedulingEvents": Array [
-            Object {
+          "schedulingEvents": [
+            {
               "lanes": "0b0000000000000000000000000100000",
               "timestamp": 10,
               "type": "schedule-render",
               "warning": null,
             },
-            Object {
+            {
               "componentName": "App",
               "componentStack": "
             in App (at **)",
@@ -2426,10 +2426,10 @@ describe('Timeline profiler', () => {
             },
           ],
           "snapshotHeight": 0,
-          "snapshots": Array [],
+          "snapshots": [],
           "startTime": -10,
-          "suspenseEvents": Array [],
-          "thrownErrors": Array [],
+          "suspenseEvents": [],
+          "thrownErrors": [],
         }
       `);
     });
diff --git a/packages/react-devtools-shared/src/__tests__/profilerChangeDescriptions-test.js b/packages/react-devtools-shared/src/__tests__/profilerChangeDescriptions-test.js
index 05966356e51aa..b93aa4916357d 100644
--- a/packages/react-devtools-shared/src/__tests__/profilerChangeDescriptions-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilerChangeDescriptions-test.js
@@ -89,12 +89,12 @@ describe('Profiler change descriptions', () => {
     expect(element.hocDisplayNames).toBeNull();
     expect(commitData.changeDescriptions.get(element.id))
       .toMatchInlineSnapshot(`
-      Object {
+      {
         "context": true,
         "didHooksChange": false,
         "hooks": null,
         "isFirstMount": false,
-        "props": Array [],
+        "props": [],
         "state": null,
       }
     `);
@@ -109,12 +109,12 @@ describe('Profiler change descriptions', () => {
     expect(element.hocDisplayNames).toBeNull();
     expect(commitData.changeDescriptions.get(element.id))
       .toMatchInlineSnapshot(`
-      Object {
+      {
         "context": true,
         "didHooksChange": false,
         "hooks": null,
         "isFirstMount": false,
-        "props": Array [],
+        "props": [],
         "state": null,
       }
     `);
@@ -124,12 +124,12 @@ describe('Profiler change descriptions', () => {
     expect(element.hocDisplayNames).toEqual(['ForwardRef']);
     expect(commitData.changeDescriptions.get(element.id))
       .toMatchInlineSnapshot(`
-      Object {
+      {
         "context": null,
         "didHooksChange": false,
         "hooks": null,
         "isFirstMount": false,
-        "props": Array [],
+        "props": [],
         "state": null,
       }
     `);
@@ -139,12 +139,12 @@ describe('Profiler change descriptions', () => {
     expect(element.hocDisplayNames).toBeNull();
     expect(commitData.changeDescriptions.get(element.id))
       .toMatchInlineSnapshot(`
-      Object {
+      {
         "context": true,
         "didHooksChange": false,
         "hooks": null,
         "isFirstMount": false,
-        "props": Array [],
+        "props": [],
         "state": null,
       }
     `);
diff --git a/packages/react-devtools-shared/src/__tests__/profilingCache-test.js b/packages/react-devtools-shared/src/__tests__/profilingCache-test.js
index dbee76a5ce3fd..d8d0690aa9c2a 100644
--- a/packages/react-devtools-shared/src/__tests__/profilingCache-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilingCache-test.js
@@ -267,35 +267,35 @@ describe('ProfilingCache', () => {
     expect(changeDescriptions).toHaveLength(5);
     expect(changeDescriptions[0]).toMatchInlineSnapshot(`
       Map {
-        2 => Object {
+        2 => {
           "context": null,
           "didHooksChange": false,
           "isFirstMount": true,
           "props": null,
           "state": null,
         },
-        4 => Object {
+        4 => {
           "context": null,
           "didHooksChange": false,
           "isFirstMount": true,
           "props": null,
           "state": null,
         },
-        5 => Object {
+        5 => {
           "context": null,
           "didHooksChange": false,
           "isFirstMount": true,
           "props": null,
           "state": null,
         },
-        6 => Object {
+        6 => {
           "context": null,
           "didHooksChange": false,
           "isFirstMount": true,
           "props": null,
           "state": null,
         },
-        7 => Object {
+        7 => {
           "context": null,
           "didHooksChange": false,
           "isFirstMount": true,
@@ -306,51 +306,51 @@ describe('ProfilingCache', () => {
     `);
     expect(changeDescriptions[1]).toMatchInlineSnapshot(`
       Map {
-        5 => Object {
+        5 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [
+          "props": [
             "count",
           ],
           "state": null,
         },
-        4 => Object {
+        4 => {
           "context": true,
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        7 => Object {
+        7 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [
+          "props": [
             "count",
           ],
           "state": null,
         },
-        6 => Object {
-          "context": Array [
+        6 => {
+          "context": [
             "count",
           ],
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        2 => Object {
+        2 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
-          "state": Array [
+          "props": [],
+          "state": [
             "count",
           ],
         },
@@ -358,140 +358,140 @@ describe('ProfilingCache', () => {
     `);
     expect(changeDescriptions[2]).toMatchInlineSnapshot(`
       Map {
-        5 => Object {
+        5 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        4 => Object {
+        4 => {
           "context": false,
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        7 => Object {
+        7 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        6 => Object {
-          "context": Array [],
+        6 => {
+          "context": [],
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        2 => Object {
+        2 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [
+          "props": [
             "foo",
           ],
-          "state": Array [],
+          "state": [],
         },
       }
     `);
     expect(changeDescriptions[3]).toMatchInlineSnapshot(`
       Map {
-        5 => Object {
+        5 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        4 => Object {
+        4 => {
           "context": false,
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        7 => Object {
+        7 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        6 => Object {
-          "context": Array [],
+        6 => {
+          "context": [],
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        2 => Object {
+        2 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [
+          "props": [
             "foo",
             "bar",
           ],
-          "state": Array [],
+          "state": [],
         },
       }
     `);
     expect(changeDescriptions[4]).toMatchInlineSnapshot(`
       Map {
-        5 => Object {
+        5 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        4 => Object {
+        4 => {
           "context": false,
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        7 => Object {
+        7 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        6 => Object {
-          "context": Array [],
+        6 => {
+          "context": [],
           "didHooksChange": false,
           "hooks": null,
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
-        2 => Object {
+        2 => {
           "context": null,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [
+          "props": [
             "bar",
           ],
-          "state": Array [],
+          "state": [],
         },
       }
     `);
@@ -630,7 +630,7 @@ describe('ProfilingCache', () => {
     // 1st render: No change
     expect(changeDescriptions[0]).toMatchInlineSnapshot(`
       Map {
-        3 => Object {
+        3 => {
           "context": null,
           "didHooksChange": false,
           "isFirstMount": true,
@@ -643,12 +643,12 @@ describe('ProfilingCache', () => {
     // 2nd render: Changed props
     expect(changeDescriptions[1]).toMatchInlineSnapshot(`
       Map {
-        3 => Object {
+        3 => {
           "context": false,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [
+          "props": [
             "count",
           ],
           "state": null,
@@ -659,14 +659,14 @@ describe('ProfilingCache', () => {
     // 3rd render: Changed useReducer
     expect(changeDescriptions[2]).toMatchInlineSnapshot(`
       Map {
-        3 => Object {
+        3 => {
           "context": false,
           "didHooksChange": true,
-          "hooks": Array [
+          "hooks": [
             1,
           ],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
       }
@@ -675,14 +675,14 @@ describe('ProfilingCache', () => {
     // 4th render: Changed useState
     expect(changeDescriptions[3]).toMatchInlineSnapshot(`
       Map {
-        3 => Object {
+        3 => {
           "context": false,
           "didHooksChange": true,
-          "hooks": Array [
+          "hooks": [
             0,
           ],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
       }
@@ -691,12 +691,12 @@ describe('ProfilingCache', () => {
     // 5th render: Changed context
     expect(changeDescriptions[4]).toMatchInlineSnapshot(`
       Map {
-        3 => Object {
+        3 => {
           "context": true,
           "didHooksChange": false,
-          "hooks": Array [],
+          "hooks": [],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
       }
@@ -705,14 +705,14 @@ describe('ProfilingCache', () => {
     // 6th render: Sync external store
     expect(changeDescriptions[5]).toMatchInlineSnapshot(`
       Map {
-        3 => Object {
+        3 => {
           "context": false,
           "didHooksChange": true,
-          "hooks": Array [
+          "hooks": [
             2,
           ],
           "isFirstMount": false,
-          "props": Array [],
+          "props": [],
           "state": null,
         },
       }
@@ -901,25 +901,25 @@ describe('ProfilingCache', () => {
     }
 
     expect(allFiberCommits).toMatchInlineSnapshot(`
-      Array [
-        Array [
+      [
+        [
           0,
           1,
           2,
         ],
-        Array [
+        [
           0,
           1,
           2,
         ],
-        Array [
+        [
           1,
           2,
         ],
-        Array [
+        [
           2,
         ],
-        Array [
+        [
           0,
         ],
       ]
@@ -949,8 +949,8 @@ describe('ProfilingCache', () => {
     const rootID = store.roots[0];
     const commitData = store.profilerStore.getDataForRoot(rootID).commitData;
     expect(commitData).toMatchInlineSnapshot(`
-      Array [
-        Object {
+      [
+        {
           "changeDescriptions": Map {},
           "duration": 0,
           "effectDuration": null,
@@ -965,8 +965,8 @@ describe('ProfilingCache', () => {
           "passiveEffectDuration": null,
           "priorityLevel": "Immediate",
           "timestamp": 0,
-          "updaters": Array [
-            Object {
+          "updaters": [
+            {
               "displayName": "render()",
               "hocDisplayNames": null,
               "id": 1,
diff --git a/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js b/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js
index 5a73cea587879..d59d616d67e61 100644
--- a/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js
@@ -107,9 +107,9 @@ describe('profiling charts', () => {
       const firstCommitData = getFlamegraphChartData(rootID, 0);
       expect(firstCommitData.commitTree.nodes.size).toBe(5);
       expect(firstCommitData.chartData.rows).toMatchInlineSnapshot(`
-        Array [
-          Array [
-            Object {
+        [
+          [
+            {
               "actualDuration": 15,
               "didRender": true,
               "id": 2,
@@ -120,8 +120,8 @@ describe('profiling charts', () => {
               "treeBaseDuration": 15,
             },
           ],
-          Array [
-            Object {
+          [
+            {
               "actualDuration": 0,
               "didRender": true,
               "id": 5,
@@ -131,7 +131,7 @@ describe('profiling charts', () => {
               "selfDuration": 0,
               "treeBaseDuration": 0,
             },
-            Object {
+            {
               "actualDuration": 2,
               "didRender": true,
               "id": 4,
@@ -141,7 +141,7 @@ describe('profiling charts', () => {
               "selfDuration": 2,
               "treeBaseDuration": 2,
             },
-            Object {
+            {
               "actualDuration": 3,
               "didRender": true,
               "id": 3,
@@ -158,9 +158,9 @@ describe('profiling charts', () => {
       const secondCommitData = getFlamegraphChartData(rootID, 1);
       expect(secondCommitData.commitTree.nodes.size).toBe(5);
       expect(secondCommitData.chartData.rows).toMatchInlineSnapshot(`
-        Array [
-          Array [
-            Object {
+        [
+          [
+            {
               "actualDuration": 10,
               "didRender": true,
               "id": 2,
@@ -171,8 +171,8 @@ describe('profiling charts', () => {
               "treeBaseDuration": 15,
             },
           ],
-          Array [
-            Object {
+          [
+            {
               "actualDuration": 0,
               "didRender": false,
               "id": 5,
@@ -182,7 +182,7 @@ describe('profiling charts', () => {
               "selfDuration": 0,
               "treeBaseDuration": 0,
             },
-            Object {
+            {
               "actualDuration": 0,
               "didRender": false,
               "id": 4,
@@ -192,7 +192,7 @@ describe('profiling charts', () => {
               "selfDuration": 0,
               "treeBaseDuration": 2,
             },
-            Object {
+            {
               "actualDuration": 0,
               "didRender": false,
               "id": 3,
@@ -258,26 +258,26 @@ describe('profiling charts', () => {
       const firstCommitData = getRankedChartData(rootID, 0);
       expect(firstCommitData.commitTree.nodes.size).toBe(5);
       expect(firstCommitData.chartData.nodes).toMatchInlineSnapshot(`
-        Array [
-          Object {
+        [
+          {
             "id": 2,
             "label": "Parent (10ms)",
             "name": "Parent",
             "value": 10,
           },
-          Object {
+          {
             "id": 3,
             "label": "Memo(Child) (Memo) key="first" (3ms)",
             "name": "Memo(Child)",
             "value": 3,
           },
-          Object {
+          {
             "id": 4,
             "label": "Memo(Child) (Memo) key="second" (2ms)",
             "name": "Memo(Child)",
             "value": 2,
           },
-          Object {
+          {
             "id": 5,
             "label": "Memo(Child) (Memo) key="third" (<0.1ms)",
             "name": "Memo(Child)",
@@ -290,8 +290,8 @@ describe('profiling charts', () => {
       const secondCommitData = getRankedChartData(rootID, 1);
       expect(secondCommitData.commitTree.nodes.size).toBe(5);
       expect(secondCommitData.chartData.nodes).toMatchInlineSnapshot(`
-        Array [
-          Object {
+        [
+          {
             "id": 2,
             "label": "Parent (10ms)",
             "name": "Parent",
diff --git a/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js b/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js
index d504481841eae..afeeaf9db839a 100644
--- a/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js
+++ b/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js
@@ -259,7 +259,7 @@ describe('StoreStressConcurrent', () => {
     }
 
     expect(snapshots).toMatchInlineSnapshot(`
-      Array [
+      [
         "[root]
         ▾ <Root>
             <A key="a">",
@@ -430,7 +430,7 @@ describe('StoreStressConcurrent', () => {
     }
 
     expect(snapshots).toMatchInlineSnapshot(`
-      Array [
+      [
         "[root]
         ▾ <Root>
             <X>
@@ -950,7 +950,7 @@ describe('StoreStressConcurrent', () => {
     }
 
     expect(snapshots).toMatchInlineSnapshot(`
-      Array [
+      [
         "[root]
         ▾ <Root>
             <X>
diff --git a/packages/react-devtools-shared/src/backend/StyleX/__tests__/utils-test.js b/packages/react-devtools-shared/src/backend/StyleX/__tests__/utils-test.js
index 4aaf3ec42b204..00d587ec048cd 100644
--- a/packages/react-devtools-shared/src/backend/StyleX/__tests__/utils-test.js
+++ b/packages/react-devtools-shared/src/backend/StyleX/__tests__/utils-test.js
@@ -35,30 +35,30 @@ describe('Stylex plugin utils', () => {
 
   it('should gracefully handle empty values', () => {
     expect(getStyleXData(null)).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {},
-        "sources": Array [],
+      {
+        "resolvedStyles": {},
+        "sources": [],
       }
     `);
 
     expect(getStyleXData(undefined)).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {},
-        "sources": Array [],
+      {
+        "resolvedStyles": {},
+        "sources": [],
       }
     `);
 
     expect(getStyleXData('')).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {},
-        "sources": Array [],
+      {
+        "resolvedStyles": {},
+        "sources": [],
       }
     `);
 
     expect(getStyleXData([undefined])).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {},
-        "sources": Array [],
+      {
+        "resolvedStyles": {},
+        "sources": [],
       }
     `);
   });
@@ -87,13 +87,13 @@ describe('Stylex plugin utils', () => {
         alignItems: 'bar',
       }),
     ).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {
+      {
+        "resolvedStyles": {
           "alignItems": "center",
           "display": "flex",
           "flexDirection": "center",
         },
-        "sources": Array [
+        "sources": [
           "Example__style",
         ],
       }
@@ -123,13 +123,13 @@ describe('Stylex plugin utils', () => {
         },
       ]),
     ).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {
+      {
+        "resolvedStyles": {
           "alignItems": "center",
           "display": "flex",
           "flexDirection": "center",
         },
-        "sources": Array [
+        "sources": [
           "Example1__style",
           "Example2__style",
         ],
@@ -164,13 +164,13 @@ describe('Stylex plugin utils', () => {
         false,
       ]),
     ).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {
+      {
+        "resolvedStyles": {
           "alignItems": "center",
           "display": "flex",
           "flexDirection": "center",
         },
-        "sources": Array [
+        "sources": [
           "Example1__style",
           "Example2__style",
         ],
@@ -204,15 +204,15 @@ describe('Stylex plugin utils', () => {
         },
       }),
     ).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {
-          ":hover": Object {
+      {
+        "resolvedStyles": {
+          ":hover": {
             "color": "blue",
             "textDecoration": "none",
           },
           "color": "black",
         },
-        "sources": Array [
+        "sources": [
           "Example__style",
         ],
       }
@@ -244,13 +244,13 @@ describe('Stylex plugin utils', () => {
         false,
       ]),
     ).toMatchInlineSnapshot(`
-      Object {
-        "resolvedStyles": Object {
+      {
+        "resolvedStyles": {
           "alignItems": "center",
           "display": "flex",
           "flexDirection": "center",
         },
-        "sources": Array [
+        "sources": [
           "Example1__style",
           "Example2__style",
           "Example3__style",
diff --git a/packages/react-devtools-shared/src/hooks/__tests__/generateHookMap-test.js b/packages/react-devtools-shared/src/hooks/__tests__/generateHookMap-test.js
index 0871d2301ef9a..b1170814e526e 100644
--- a/packages/react-devtools-shared/src/hooks/__tests__/generateHookMap-test.js
+++ b/packages/react-devtools-shared/src/hooks/__tests__/generateHookMap-test.js
@@ -70,9 +70,9 @@ export function Component() {
 
     const encodedHookMap = generateEncodedHookMap(parsed);
     expect(encodedHookMap).toMatchInlineSnapshot(`
-    Object {
+    {
       "mappings": "CAAD;KYCA,AgBDA;MREA,AWFA;SnBGA,AaHA,AMIA,AaJA;WpBKA,AiCLA;Y7CMA,AYNA",
-      "names": Array [
+      "names": [
         "<no-hook>",
         "a",
         "b",
@@ -115,9 +115,9 @@ export function Component() {
 
     const encodedHookMap = generateEncodedHookMap(parsed);
     expect(encodedHookMap).toMatchInlineSnapshot(`
-    Object {
+    {
       "mappings": "CAAD;MgBCA,AUDA;OFEA,AUFA",
-      "names": Array [
+      "names": [
         "<no-hook>",
         "theme",
         "val",
@@ -158,9 +158,9 @@ export function Component() {
 
     const encodedHookMap = generateEncodedHookMap(parsed);
     expect(encodedHookMap).toMatchInlineSnapshot(`
-    Object {
+    {
       "mappings": "CAAD;KyBCA;MKCA,AWDA;SrCDA",
-      "names": Array [
+      "names": [
         "<no-hook>",
         "InnerComponent",
         "state",
@@ -200,9 +200,9 @@ export function Component() {
 
     const encodedHookMap = generateEncodedHookMap(parsed);
     expect(encodedHookMap).toMatchInlineSnapshot(`
-    Object {
+    {
       "mappings": "CAAD;MwBCA,AWDA",
-      "names": Array [
+      "names": [
         "<no-hook>",
         "val",
       ],
diff --git a/packages/react-devtools-timeline/src/content-views/utils/__tests__/colors-test.js b/packages/react-devtools-timeline/src/content-views/utils/__tests__/colors-test.js
index ccfb3cee4bd5c..517cd3b66fee8 100644
--- a/packages/react-devtools-timeline/src/content-views/utils/__tests__/colors-test.js
+++ b/packages/react-devtools-timeline/src/content-views/utils/__tests__/colors-test.js
@@ -41,7 +41,7 @@ describe(ColorGenerator, () => {
   describe(ColorGenerator.prototype.colorForID, () => {
     it('should generate a color for an ID', () => {
       expect(new ColorGenerator().colorForID('123')).toMatchInlineSnapshot(`
-        Object {
+        {
           "a": 1,
           "h": 190,
           "l": 80,
diff --git a/packages/react-devtools-timeline/src/view-base/utils/__tests__/scrollState-test.js b/packages/react-devtools-timeline/src/view-base/utils/__tests__/scrollState-test.js
index 306caffa6076c..0241ea3f14a5f 100644
--- a/packages/react-devtools-timeline/src/view-base/utils/__tests__/scrollState-test.js
+++ b/packages/react-devtools-timeline/src/view-base/utils/__tests__/scrollState-test.js
@@ -210,7 +210,7 @@ describe(zoomState, () => {
     });
 
     expect(zoomedState).toMatchInlineSnapshot(`
-      Object {
+      {
         "length": 200,
         "offset": -50,
       }
@@ -232,7 +232,7 @@ describe(moveStateToRange, () => {
     });
 
     expect(movedState).toMatchInlineSnapshot(`
-      Object {
+      {
         "length": 400,
         "offset": -50,
       }
diff --git a/packages/react-dom/src/__tests__/ReactDOMHydrationDiff-test.js b/packages/react-dom/src/__tests__/ReactDOMHydrationDiff-test.js
index 8a37ddaa007c0..bd34fbb20ce5b 100644
--- a/packages/react-dom/src/__tests__/ReactDOMHydrationDiff-test.js
+++ b/packages/react-dom/src/__tests__/ReactDOMHydrationDiff-test.js
@@ -91,7 +91,7 @@ describe('ReactDOMServerHydration', () => {
       }
       if (gate(flags => flags.enableClientRenderFallbackOnTextMismatch)) {
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-          Array [
+          [
             "Warning: Text content did not match. Server: "server" Client: "client"
               in main (at **)
               in div (at **)
@@ -103,7 +103,7 @@ describe('ReactDOMServerHydration', () => {
         `);
       } else {
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-          Array [
+          [
             "Warning: Text content did not match. Server: "server" Client: "client"
               in main (at **)
               in div (at **)
@@ -130,7 +130,7 @@ describe('ReactDOMServerHydration', () => {
         );
       }
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-        Array [
+        [
           "Warning: Prop \`dangerouslySetInnerHTML\` did not match. Server: "<span>server</span>" Client: "<span>client</span>"
             in main (at **)
             in div (at **)
@@ -154,7 +154,7 @@ describe('ReactDOMServerHydration', () => {
         );
       }
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-        Array [
+        [
           "Warning: Prop \`className\` did not match. Server: "child server" Client: "child client"
             in main (at **)
             in div (at **)
@@ -177,7 +177,7 @@ describe('ReactDOMServerHydration', () => {
         );
       }
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-        Array [
+        [
           "Warning: Prop \`tabIndex\` did not match. Server: "null" Client: "1"
             in main (at **)
             in div (at **)
@@ -200,7 +200,7 @@ describe('ReactDOMServerHydration', () => {
         );
       }
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-        Array [
+        [
           "Warning: Extra attributes from the server: tabindex,dir
             in main (at **)
             in div (at **)
@@ -223,7 +223,7 @@ describe('ReactDOMServerHydration', () => {
         );
       }
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-        Array [
+        [
           "Warning: Prop \`tabIndex\` did not match. Server: "null" Client: "1"
             in main (at **)
             in div (at **)
@@ -247,7 +247,7 @@ describe('ReactDOMServerHydration', () => {
         );
       }
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-        Array [
+        [
           "Warning: Prop \`style\` did not match. Server: "opacity:0" Client: "opacity:1"
             in main (at **)
             in div (at **)
@@ -269,7 +269,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <main> in <div>.
                 in main (at **)
                 in div (at **)
@@ -293,7 +293,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <header> in <div>.
                 in header (at **)
                 in div (at **)
@@ -317,7 +317,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <main> in <div>.
                 in main (at **)
                 in div (at **)
@@ -341,7 +341,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <footer> in <div>.
                 in footer (at **)
                 in div (at **)
@@ -362,7 +362,7 @@ describe('ReactDOMServerHydration', () => {
         }
         if (gate(flags => flags.enableClientRenderFallbackOnTextMismatch)) {
           expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Text content did not match. Server: "" Client: "only"
                 in div (at **)
                 in Mismatch (at **)",
@@ -373,7 +373,7 @@ describe('ReactDOMServerHydration', () => {
           `);
         } else {
           expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Text content did not match. Server: "" Client: "only"
                 in div (at **)
                 in Mismatch (at **)",
@@ -394,7 +394,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching text node for "second" in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -417,7 +417,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching text node for "first" in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -440,7 +440,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching text node for "third" in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -465,7 +465,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain a <main> in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -488,7 +488,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <main> in <div>.
                 in main (at **)
                 in div (at **)
@@ -513,7 +513,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <footer> in <div>.
                 in footer (at **)
                 in div (at **)
@@ -537,7 +537,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain a <footer> in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -556,7 +556,7 @@ describe('ReactDOMServerHydration', () => {
           return <div className="parent">{!isClient && 'only'}</div>;
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain the text node "only" in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -579,7 +579,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <main> in <div>.
                 in main (at **)
                 in div (at **)
@@ -604,7 +604,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <footer> in <div>.
                 in footer (at **)
                 in div (at **)
@@ -628,7 +628,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain the text node "third" in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -662,7 +662,7 @@ describe('ReactDOMServerHydration', () => {
         }
         // TODO: This message doesn't seem to have any useful details.
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: An error occurred during hydration. The server HTML was replaced with client content in <div>.",
               "Caught [Hydration failed because the initial UI does not match what was rendered on the server.]",
               "Caught [There was an error while hydrating. Because the error happened outside of a Suspense boundary, the entire root will switch to client rendering.]",
@@ -684,7 +684,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain a <main> in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -711,7 +711,7 @@ describe('ReactDOMServerHydration', () => {
         }
         // TODO: This message doesn't seem to have any useful details.
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: An error occurred during hydration. The server HTML was replaced with client content in <div>.",
               "Caught [Hydration failed because the initial UI does not match what was rendered on the server.]",
               "Caught [There was an error while hydrating. Because the error happened outside of a Suspense boundary, the entire root will switch to client rendering.]",
@@ -739,7 +739,7 @@ describe('ReactDOMServerHydration', () => {
         // unhydrated tail nodes and this template is the first match. When we add special case handling for client
         // rendered suspense boundaries this test will likely change again
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain a <template> in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -764,7 +764,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <main> in <div>.
                 in main (at **)
                 in Suspense (at **)
@@ -790,7 +790,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <footer> in <div>.
                 in footer (at **)
                 in Suspense (at **)
@@ -822,7 +822,7 @@ describe('ReactDOMServerHydration', () => {
         }
 
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Caught [The server did not finish this Suspense boundary: The server used "renderToString" which does not support Suspense. If you intended for this Suspense boundary to render the fallback content on the server consider throwing an Error somewhere within the Suspense boundary. If you intended to have the server wait for the suspended component please switch to "renderToPipeableStream" which supports Suspense on the server]",
             ]
           `);
@@ -848,7 +848,7 @@ describe('ReactDOMServerHydration', () => {
         }
 
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Caught [The server did not finish this Suspense boundary: The server used "renderToString" which does not support Suspense. If you intended for this Suspense boundary to render the fallback content on the server consider throwing an Error somewhere within the Suspense boundary. If you intended to have the server wait for the suspended component please switch to "renderToPipeableStream" which supports Suspense on the server]",
             ]
           `);
@@ -872,7 +872,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Expected server HTML to contain a matching <header> in <div>.
                 in header (at **)
                 in div (at **)
@@ -902,7 +902,7 @@ describe('ReactDOMServerHydration', () => {
           );
         }
         expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-            Array [
+            [
               "Warning: Did not expect server HTML to contain a <header> in <div>.
                 in div (at **)
                 in Mismatch (at **)",
@@ -951,7 +951,7 @@ describe('ReactDOMServerHydration', () => {
       }
 
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-          Array [
+          [
             "Warning: Expected server HTML to contain a matching <footer> in <div>.
               in footer (at **)
               in Panel (at **)
@@ -1000,7 +1000,7 @@ describe('ReactDOMServerHydration', () => {
       }
 
       expect(testMismatch(Mismatch)).toMatchInlineSnapshot(`
-          Array [
+          [
             "Warning: Did not expect server HTML to contain a <footer> in <div>.
               in div (at **)
               in ProfileSettings (at **)
diff --git a/packages/react-dom/src/__tests__/__snapshots__/ReactTestUtils-test.js.snap b/packages/react-dom/src/__tests__/__snapshots__/ReactTestUtils-test.js.snap
index 91b25eb20bc58..8dda81dcae42b 100644
--- a/packages/react-dom/src/__tests__/__snapshots__/ReactTestUtils-test.js.snap
+++ b/packages/react-dom/src/__tests__/__snapshots__/ReactTestUtils-test.js.snap
@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`ReactTestUtils Simulate should have locally attached media events 1`] = `
-Array [
+[
   "abort",
   "animationEnd",
   "animationIteration",
diff --git a/packages/react-native-renderer/src/__tests__/__snapshots__/ReactFabric-test.internal.js.snap b/packages/react-native-renderer/src/__tests__/__snapshots__/ReactFabric-test.internal.js.snap
index a97d03c0fd8df..90953ff2e6b31 100644
--- a/packages/react-native-renderer/src/__tests__/__snapshots__/ReactFabric-test.internal.js.snap
+++ b/packages/react-native-renderer/src/__tests__/__snapshots__/ReactFabric-test.internal.js.snap
@@ -103,7 +103,7 @@ exports[`ReactFabric renders and reorders children 2`] = `
 `;
 
 exports[`ReactFabric should call complete after inserting children 1`] = `
-Array [
+[
   "RCTView {"foo":"a"}
   RCTView {"foo":"b"}",
 ]
diff --git a/packages/react-server-native-relay/src/__tests__/__snapshots__/ReactFlightNativeRelay-test.internal.js.snap b/packages/react-server-native-relay/src/__tests__/__snapshots__/ReactFlightNativeRelay-test.internal.js.snap
index 5184a033b3a3a..324f64d706603 100644
--- a/packages/react-server-native-relay/src/__tests__/__snapshots__/ReactFlightNativeRelay-test.internal.js.snap
+++ b/packages/react-server-native-relay/src/__tests__/__snapshots__/ReactFlightNativeRelay-test.internal.js.snap
@@ -9,8 +9,8 @@ exports[`ReactFlightNativeRelay can render a Client Component using a module ref
 `;
 
 exports[`ReactFlightNativeRelay can render a Server Component 1`] = `
-Object {
-  "foo": Object {
+{
+  "foo": {
     "bar": <RCTView>
       <RCTText>
         A
diff --git a/packages/react/src/__tests__/__snapshots__/ReactProfiler-test.internal.js.snap b/packages/react/src/__tests__/__snapshots__/ReactProfiler-test.internal.js.snap
index 35da4c29611ab..6ea6dacc4c815 100644
--- a/packages/react/src/__tests__/__snapshots__/ReactProfiler-test.internal.js.snap
+++ b/packages/react/src/__tests__/__snapshots__/ReactProfiler-test.internal.js.snap
@@ -19,7 +19,7 @@ exports[`Profiler works in profiling and non-profiling bundles enableProfilerTim
 exports[`Profiler works in profiling and non-profiling bundles enableProfilerTimer:disabled should support an empty Profiler (with no children) 2`] = `<div />`;
 
 exports[`Profiler works in profiling and non-profiling bundles enableProfilerTimer:disabled should support nested Profilers 1`] = `
-Array [
+[
   <div>
     outer function component
   </div>,
@@ -51,7 +51,7 @@ exports[`Profiler works in profiling and non-profiling bundles enableProfilerTim
 exports[`Profiler works in profiling and non-profiling bundles enableProfilerTimer:enabled should support an empty Profiler (with no children) 2`] = `<div />`;
 
 exports[`Profiler works in profiling and non-profiling bundles enableProfilerTimer:enabled should support nested Profilers 1`] = `
-Array [
+[
   <div>
     outer function component
   </div>,
diff --git a/scripts/jest/config.base.js b/scripts/jest/config.base.js
index e7deaa4ecb6ba..96c60761b0619 100644
--- a/scripts/jest/config.base.js
+++ b/scripts/jest/config.base.js
@@ -24,9 +24,6 @@ module.exports = {
     enableGlobally: true,
     legacyFakeTimers: true,
   },
-  snapshotFormat: {
-    printBasicPrototype: true,
-  },
   snapshotSerializers: [require.resolve('jest-snapshot-serializer-raw')],
 
   testSequencer: require.resolve('./jestSequencer'),