diff --git a/test/karma-test-shim.js b/test/karma-test-shim.js
index 4b6426f002e..95f56912384 100644
--- a/test/karma-test-shim.js
+++ b/test/karma-test-shim.js
@@ -25,17 +25,17 @@ System.config({
   packages: {
     'base/dist/components': {
       defaultExtension: false,
-      format: 'register',
+      format: 'cjs',
       map: getPathsMap('components')
     },
     'base/dist/core': {
       defaultExtension: false,
-      format: 'register',
+      format: 'cjs',
       map: getPathsMap('core')
     },
     'base/dist/directives': {
       defaultExtension: false,
-      format: 'register',
+      format: 'cjs',
       map: getPathsMap('directives')
     },
   }