diff --git a/packages/next/src/build/analysis/get-page-static-info.ts b/packages/next/src/build/analysis/get-page-static-info.ts
index f4dc24a74893..4b465cccb669 100644
--- a/packages/next/src/build/analysis/get-page-static-info.ts
+++ b/packages/next/src/build/analysis/get-page-static-info.ts
@@ -332,7 +332,7 @@ export async function getPageStaticInfo(params: {
 
     const requiresServerRuntime = ssr || ssg || pageType === 'app'
 
-    const isAnAPIRoute = isAPIRoute(page?.replace(/^\/pages\//, '/'))
+    const isAnAPIRoute = isAPIRoute(page?.replace(/^(?:\/src)?\/pages\//, '/'))
 
     resolvedRuntime = isEdgeRuntime(resolvedRuntime)
       ? resolvedRuntime
diff --git a/test/e2e/edge-configurable-runtime/app/src/pages/api/edge.js b/test/e2e/edge-configurable-runtime/app/src/pages/api/edge.js
new file mode 100644
index 000000000000..beac5edf5a72
--- /dev/null
+++ b/test/e2e/edge-configurable-runtime/app/src/pages/api/edge.js
@@ -0,0 +1,2 @@
+export default () => new Response('ok')
+export const config = { runtime: 'edge' }
diff --git a/test/e2e/edge-configurable-runtime/app/src/pages/index.jsx b/test/e2e/edge-configurable-runtime/app/src/pages/index.jsx
new file mode 100644
index 000000000000..dc344c3effb9
--- /dev/null
+++ b/test/e2e/edge-configurable-runtime/app/src/pages/index.jsx
@@ -0,0 +1 @@
+export default () => <p>hello world</p>
diff --git a/test/e2e/edge-configurable-runtime/index.test.ts b/test/e2e/edge-configurable-runtime/index.test.ts
index 9d93f70c60dd..75bbd2529082 100644
--- a/test/e2e/edge-configurable-runtime/index.test.ts
+++ b/test/e2e/edge-configurable-runtime/index.test.ts
@@ -4,14 +4,16 @@ import { fetchViaHTTP, File, nextBuild } from 'next-test-utils'
 import { join } from 'path'
 import stripAnsi from 'strip-ansi'
 
-const appDir = join(__dirname, './app')
 const pagePath = 'pages/index.jsx'
 const apiPath = 'pages/api/edge.js'
-const page = new File(join(appDir, pagePath))
-const api = new File(join(appDir, apiPath))
 
-describe('Configurable runtime for pages and API routes', () => {
+describe.each([
+  { appDir: join(__dirname, './app/src'), title: 'src/pages and API routes' },
+  { appDir: join(__dirname, './app'), title: 'pages and API routes' },
+])('Configurable runtime for $title', ({ appDir }) => {
   let next: NextInstance
+  const page = new File(join(appDir, pagePath))
+  const api = new File(join(appDir, apiPath))
 
   if ((global as any).isNextDev) {
     describe('In dev mode', () => {