diff --git a/lib/cmd/test.js b/lib/cmd/test.js
index c2ed834d..294443d1 100644
--- a/lib/cmd/test.js
+++ b/lib/cmd/test.js
@@ -102,7 +102,7 @@ class TestCommand extends Command {
     }
 
     // expand glob and skip node_modules and fixtures
-    files = globby.sync(files.concat('!test/**/{fixtures, node_modules}/**/*.test.js'));
+    files = globby.sync(files.concat([ '!test/fixtures', '!test/node_modules' ]));
     files.sort();
 
     // auto add setup file as the first test file