diff --git a/packages/next-swc/crates/next-dev-tests/tests/integration/next/app/404-custom/input/app/test.tsx b/packages/next-swc/crates/next-dev-tests/tests/integration/next/app/404-custom/input/app/test.tsx
index 3f059c305953e..fb3db2527086c 100644
--- a/packages/next-swc/crates/next-dev-tests/tests/integration/next/app/404-custom/input/app/test.tsx
+++ b/packages/next-swc/crates/next-dev-tests/tests/integration/next/app/404-custom/input/app/test.tsx
@@ -48,6 +48,7 @@ function runTests(harness: Harness, iframe: HTMLIFrameElement) {
     TIMEOUT
   )
 
+  // TODO: This test is flaky, so it needs a particularly long timeout.
   it(
     'renders a custom 404 page',
     async () => {
@@ -58,7 +59,7 @@ function runTests(harness: Harness, iframe: HTMLIFrameElement) {
         iframe.contentDocument!.querySelector('[data-test-notfound]')
       ).not.toBeNull()
     },
-    TIMEOUT
+    LONG_TIMEOUT
   )
 
   // TODO: This test is flaky, so it needs a particularly long timeout.