diff --git a/views/ngXosLib/karma.conf.js b/views/ngXosLib/karma.conf.js
index 060e7dd..ae486dc 100644
--- a/views/ngXosLib/karma.conf.js
+++ b/views/ngXosLib/karma.conf.js
@@ -43,7 +43,7 @@
     // preprocess matching files before serving them to the browser
     // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
     preprocessors: {
-      '**/*.test.js': ['babel']
+      'xosHelpers/**/*.js': ['babel'],
     },
 
     babelPreprocessor: {