diff --git a/x-pack/scripts/functional_tests.js b/x-pack/scripts/functional_tests.js
index f513d117e08ae..46bcac2fc2c67 100644
--- a/x-pack/scripts/functional_tests.js
+++ b/x-pack/scripts/functional_tests.js
@@ -21,7 +21,7 @@ require('@kbn/test').runTestsCli([
   require.resolve('../test/token_api_integration/config.js'),
   require.resolve('../test/oidc_api_integration/config.ts'),
   require.resolve('../test/oidc_api_integration/implicit_flow.config.ts'),
-  // require.resolve('../test/pki_api_integration/config.ts'),
+  require.resolve('../test/pki_api_integration/config.ts'),
   require.resolve('../test/spaces_api_integration/spaces_only/config'),
   require.resolve('../test/spaces_api_integration/security_and_spaces/config_trial'),
   require.resolve('../test/spaces_api_integration/security_and_spaces/config_basic'),