diff --git a/packages/next/src/server/lib/router-utils/build-data-route.ts b/packages/next/src/server/lib/router-utils/build-data-route.ts
index 6aab1d9144ceb..b0564da5ac1a1 100644
--- a/packages/next/src/server/lib/router-utils/build-data-route.ts
+++ b/packages/next/src/server/lib/router-utils/build-data-route.ts
@@ -33,7 +33,7 @@ export function buildDataRoute(page: string, buildId: string) {
         `^${path.posix.join(
           '/_next/data',
           escapeStringRegexp(buildId),
-          `${pagePath}.json`
+          `${pagePath}\\.json`
         )}$`
       ).source
     )
diff --git a/test/e2e/edge-pages-support/index.test.ts b/test/e2e/edge-pages-support/index.test.ts
index 9ba79dc3b28f4..625489c236d1f 100644
--- a/test/e2e/edge-pages-support/index.test.ts
+++ b/test/e2e/edge-pages-support/index.test.ts
@@ -163,7 +163,7 @@ describe('edge-render-getserversideprops', () => {
       expect(manifest.dataRoutes).toEqual([
         {
           dataRouteRegex: normalizeRegEx(
-            `^/_next/data/${escapeStringRegexp(next.buildId)}/index.json$`
+            `^/_next/data/${escapeStringRegexp(next.buildId)}/index\\.json$`
           ),
           page: '/',
         },
diff --git a/test/e2e/getserversideprops/test/index.test.ts b/test/e2e/getserversideprops/test/index.test.ts
index 09c8450bd3b07..b0957855a4ae0 100644
--- a/test/e2e/getserversideprops/test/index.test.ts
+++ b/test/e2e/getserversideprops/test/index.test.ts
@@ -26,19 +26,19 @@ let next: NextInstance
 const expectedManifestRoutes = () => [
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/index.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/index\\.json$`
     ),
     page: '/',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/another.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/another\\.json$`
     ),
     page: '/another',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/blog.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/blog\\.json$`
     ),
     page: '/blog',
   },
@@ -83,44 +83,44 @@ const expectedManifestRoutes = () => [
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/custom-cache.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/custom-cache\\.json$`
     ),
     page: '/custom-cache',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/default-revalidate.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/default-revalidate\\.json$`
     ),
     page: '/default-revalidate',
   },
   {
     dataRouteRegex: `^\\/_next\\/data\\/${escapeRegex(
       buildId
-    )}\\/early-request-end.json$`,
+    )}\\/early-request-end\\.json$`,
     page: '/early-request-end',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/enoent.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/enoent\\.json$`
     ),
     page: '/enoent',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/invalid-keys.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/invalid-keys\\.json$`
     ),
     page: '/invalid-keys',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/non-json.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/non-json\\.json$`
     ),
     page: '/non-json',
   },
   {
     dataRouteRegex: `^\\/_next\\/data\\/${escapeRegex(
       buildId
-    )}\\/not-found.json$`,
+    )}\\/not-found\\.json$`,
     page: '/not-found',
   },
   {
@@ -137,13 +137,13 @@ const expectedManifestRoutes = () => [
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/promise.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/promise\\.json$`
     ),
     page: '/promise',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/promise\\/mutate-res.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/promise\\/mutate-res\\.json$`
     ),
     page: '/promise/mutate-res',
   },
@@ -151,7 +151,7 @@ const expectedManifestRoutes = () => [
     dataRouteRegex: normalizeRegEx(
       `^\\/_next\\/data\\/${escapeRegex(
         buildId
-      )}\\/promise\\/mutate-res-no-streaming.json$`
+      )}\\/promise\\/mutate-res-no-streaming\\.json$`
     ),
     page: '/promise/mutate-res-no-streaming',
   },
@@ -159,25 +159,25 @@ const expectedManifestRoutes = () => [
     dataRouteRegex: normalizeRegEx(
       `^\\/_next\\/data\\/${escapeRegex(
         buildId
-      )}\\/promise\\/mutate-res-props.json$`
+      )}\\/promise\\/mutate-res-props\\.json$`
     ),
     page: '/promise/mutate-res-props',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/refresh.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/refresh\\.json$`
     ),
     page: '/refresh',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/slow.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/slow\\.json$`
     ),
     page: '/slow',
   },
   {
     dataRouteRegex: normalizeRegEx(
-      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/something.json$`
+      `^\\/_next\\/data\\/${escapeRegex(buildId)}\\/something\\.json$`
     ),
     page: '/something',
   },
diff --git a/test/e2e/prerender.test.ts b/test/e2e/prerender.test.ts
index 238742b745f3d..531f47efba330 100644
--- a/test/e2e/prerender.test.ts
+++ b/test/e2e/prerender.test.ts
@@ -1334,7 +1334,7 @@ describe('Prerender', () => {
           expect(dataRoutes).toEqual([
             {
               dataRouteRegex: normalizeRegEx(
-                `^\\/_next\\/data\\/${escapeRegex(next.buildId)}\\/index.json$`
+                `^\\/_next\\/data\\/${escapeRegex(next.buildId)}\\/index\\.json$`
               ),
               page: '/',
             },
@@ -1342,7 +1342,7 @@ describe('Prerender', () => {
               dataRouteRegex: normalizeRegEx(
                 `^\\/_next\\/data\\/${escapeRegex(
                   next.buildId
-                )}\\/another.json$`
+                )}\\/another\\.json$`
               ),
               page: '/another',
             },
@@ -1364,7 +1364,7 @@ describe('Prerender', () => {
               dataRouteRegex: normalizeRegEx(
                 `^\\/_next\\/data\\/${escapeRegex(
                   next.buildId
-                )}\\/bad-gssp.json$`
+                )}\\/bad-gssp\\.json$`
               ),
               page: '/bad-gssp',
             },
@@ -1372,7 +1372,7 @@ describe('Prerender', () => {
               dataRouteRegex: normalizeRegEx(
                 `^\\/_next\\/data\\/${escapeRegex(
                   next.buildId
-                )}\\/bad-ssr.json$`
+                )}\\/bad-ssr\\.json$`
               ),
               page: '/bad-ssr',
             },
@@ -1414,7 +1414,7 @@ describe('Prerender', () => {
             },
             {
               dataRouteRegex: normalizeRegEx(
-                `^\\/_next\\/data\\/${escapeRegex(next.buildId)}\\/blog.json$`
+                `^\\/_next\\/data\\/${escapeRegex(next.buildId)}\\/blog\\.json$`
               ),
               page: '/blog',
             },
@@ -1493,7 +1493,7 @@ describe('Prerender', () => {
               dataRouteRegex: normalizeRegEx(
                 `^\\/_next\\/data\\/${escapeRegex(
                   next.buildId
-                )}\\/default-revalidate.json$`
+                )}\\/default-revalidate\\.json$`
               ),
               page: '/default-revalidate',
             },
@@ -1530,7 +1530,7 @@ describe('Prerender', () => {
             //   dataRouteRegex: normalizeRegEx(
             //     `^\\/_next\\/data\\/${escapeRegex(
             //       next.buildId
-            //     )}\\/index\\/index.json$`
+            //     )}\\/index\\/index\\.json$`
             //   ),
             //   page: '/index',
             // },
@@ -1551,13 +1551,13 @@ describe('Prerender', () => {
             {
               dataRouteRegex: `^\\/_next\\/data\\/${escapeRegex(
                 next.buildId
-              )}\\/large-page-data.json$`,
+              )}\\/large-page-data\\.json$`,
               page: '/large-page-data',
             },
             {
               dataRouteRegex: `^\\/_next\\/data\\/${escapeRegex(
                 next.buildId
-              )}\\/large-page-data-ssr.json$`,
+              )}\\/large-page-data-ssr\\.json$`,
               page: '/large-page-data-ssr',
             },
             {
@@ -1592,7 +1592,7 @@ describe('Prerender', () => {
               dataRouteRegex: normalizeRegEx(
                 `^\\/_next\\/data\\/${escapeRegex(
                   next.buildId
-                )}\\/preview.json$`
+                )}\\/preview\\.json$`
               ),
               page: '/preview',
             },
@@ -1600,13 +1600,13 @@ describe('Prerender', () => {
               dataRouteRegex: normalizeRegEx(
                 `^\\/_next\\/data\\/${escapeRegex(
                   next.buildId
-                )}\\/something.json$`
+                )}\\/something\\.json$`
               ),
               page: '/something',
             },
             {
               dataRouteRegex: normalizeRegEx(
-                `^\\/_next\\/data\\/${escapeRegex(next.buildId)}\\/ssr.json$`
+                `^\\/_next\\/data\\/${escapeRegex(next.buildId)}\\/ssr\\.json$`
               ),
               page: '/ssr',
             },