diff --git a/test/fixtures/my-egg-bin/lib/cmd/test-debug.js b/test/fixtures/my-egg-bin/lib/cmd/test-debug.js
index 02ac0e78..b9baa155 100644
--- a/test/fixtures/my-egg-bin/lib/cmd/test-debug.js
+++ b/test/fixtures/my-egg-bin/lib/cmd/test-debug.js
@@ -8,7 +8,7 @@ class TestDebugCommand extends Command {
   }
 
   * run(context) {
-    const testArgs = this.formatTestArgs(context);
+    const testArgs = yield this.formatTestArgs(context);
     console.log('%j', testArgs);
   }
 }