diff --git a/test/reporters/helpers.js b/test/reporters/helpers.js
index c47880f135..bd49392a40 100644
--- a/test/reporters/helpers.js
+++ b/test/reporters/helpers.js
@@ -23,7 +23,7 @@ function createMockRunner(runStr, ifStr1, ifStr2, ifStr3, arg1, arg2) {
     on: runnerFunction,
     once: runnerFunction
   };
-  mockRunner.stats = createStatsCollector(mockRunner);
+  createStatsCollector(mockRunner);
   return mockRunner;
 }