diff --git a/x-pack/scripts/functional_tests.js b/x-pack/scripts/functional_tests.js
index 6efe35dd58e7b..18ab9bad52450 100644
--- a/x-pack/scripts/functional_tests.js
+++ b/x-pack/scripts/functional_tests.js
@@ -15,7 +15,7 @@ require('@kbn/test').runTestsCli([
   require.resolve('../test/alerting_api_integration/spaces_only/config.ts'),
   require.resolve('../test/alerting_api_integration/security_and_spaces/config.ts'),
   require.resolve('../test/plugin_api_integration/config.js'),
-  require.resolve('../test/plugin_functional/config.js'),
+  require.resolve('../test/plugin_functional/config'),
   require.resolve('../test/kerberos_api_integration/config'),
   require.resolve('../test/kerberos_api_integration/anonymous_access.config'),
   require.resolve('../test/saml_api_integration/config'),