diff --git a/modules/__mocks__/prefix.js b/modules/__mocks__/prefix.js
new file mode 100644
index 00000000..73e6817b
--- /dev/null
+++ b/modules/__mocks__/prefix.js
@@ -0,0 +1,7 @@
+'use strict';
+
+var prefixMock = function(style, mode) {
+  return style;
+};
+
+module.exports = prefixMock;