diff --git a/test/lib/next-test-utils.ts b/test/lib/next-test-utils.ts
index af93d6068b..a353c0c87c 100644
--- a/test/lib/next-test-utils.ts
+++ b/test/lib/next-test-utils.ts
@@ -529,6 +529,9 @@ export async function killApp(
   instance?: ChildProcess,
   signal: NodeJS.Signals | number = 'SIGKILL'
 ) {
+  if (!instance) {
+    return
+  }
   if (
     instance?.pid &&
     instance.exitCode === null &&
@@ -558,7 +561,10 @@ export async function startApp(app: NextServer) {
   return server
 }
 
-export async function stopApp(server: http.Server) {
+export async function stopApp(server: http.Server | undefined) {
+  if (!server) {
+    return
+  }
   if (server['__app']) {
     await server['__app'].close()
   }
diff --git a/test/production/bfcache-routing/index.test.ts b/test/production/bfcache-routing/index.test.ts
index 6c816e8952..4df1876bba 100644
--- a/test/production/bfcache-routing/index.test.ts
+++ b/test/production/bfcache-routing/index.test.ts
@@ -22,9 +22,7 @@ describe('bfcache-routing', () => {
   })
 
   afterAll(() => {
-    if (app) {
-      stopApp(app)
-    }
+    stopApp(app)
   })
 
   it('should not suspend indefinitely when page is restored from bfcache after an mpa navigation', async () => {