diff --git a/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts b/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts
index 09041b0634d19..444a51f739515 100644
--- a/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts
+++ b/packages/@aws-cdk/cfnspec/build-tools/create-missing-libraries.ts
@@ -242,6 +242,7 @@ async function main() {
       '.eslintrc.js',
       'jest.config.js',
       'junit.xml',
+      'test/',
     ]);
 
     await write('lib/index.ts', [