diff --git a/tools/cdk-build-tools/lib/feature-flag.ts b/tools/cdk-build-tools/lib/feature-flag.ts
index eec1d28d6e9e4..36b22588288aa 100644
--- a/tools/cdk-build-tools/lib/feature-flag.ts
+++ b/tools/cdk-build-tools/lib/feature-flag.ts
@@ -30,9 +30,8 @@ export function testFutureBehavior<T>(
 
   const major = cdkMajorVersion(repoRoot);
   if (major === 2) {
-    // Temporaily disable CDKv2 behaviour
-    // const app = new cdkApp();
-    // return test(name, async () => fn(app));
+    const app = new cdkApp();
+    return test(name, async () => fn(app));
   }
   const app = new cdkApp({ context: flags });
   return test(name, () => fn(app));
@@ -59,8 +58,7 @@ export function testLegacyBehavior<T>(
 
   const major = cdkMajorVersion(repoRoot);
   if (major === 2) {
-    // Temporarily disable CDKv2 behaviour
-    // return;
+    return;
   }
   const app = new cdkApp();
   return test(name, () => fn(app));
@@ -78,4 +76,4 @@ function cdkMajorVersion(repoRoot: string) {
     throw new Error(`version ${ver} is not a semver`);
   }
   return sem.major;
-}
\ No newline at end of file
+}