diff --git a/src/core/core_utils.js b/src/core/core_utils.js
index c507dfdcc2ca43..9d9c08fed22cb0 100644
--- a/src/core/core_utils.js
+++ b/src/core/core_utils.js
@@ -242,10 +242,15 @@ function isBooleanArray(arr, len) {
  * @returns {boolean}
  */
 function isNumberArray(arr, len) {
+  // ArrayBuffer.isView... check allows us to have typed arrays but not the
+  // BigInt64Array/BigUint64Array types (their elements aren't "number").
   return (
-    Array.isArray(arr) &&
-    (len === null || arr.length === len) &&
-    arr.every(x => typeof x === "number")
+    (ArrayBuffer.isView(arr) &&
+      (arr.length === 0 || typeof arr[0] === "number") &&
+      (len === null || arr.length === len)) ||
+    (Array.isArray(arr) &&
+      (len === null || arr.length === len) &&
+      arr.every(x => typeof x === "number"))
   );
 }
 
diff --git a/test/driver.js b/test/driver.js
index 8b26975f92aea5..362c3d33d6ba09 100644
--- a/test/driver.js
+++ b/test/driver.js
@@ -610,7 +610,7 @@ class Driver {
 
         if (task.annotationStorage) {
           for (const annotation of Object.values(task.annotationStorage)) {
-            const { bitmapName } = annotation;
+            const { bitmapName, quadPoints } = annotation;
             if (bitmapName) {
               promise = promise.then(async doc => {
                 const response = await fetch(
@@ -643,6 +643,11 @@ class Driver {
                 return doc;
               });
             }
+            if (quadPoints) {
+              // Just to ensure that the quadPoints are always a Float32Array
+              // like IRL (in order to avoid bugs like bug 1907958).
+              annotation.quadPoints = new Float32Array(quadPoints);
+            }
           }
         }