diff --git a/macrostep-test.el b/macrostep-test.el
index 9de1fae..c49ac0a 100644
--- a/macrostep-test.el
+++ b/macrostep-test.el
@@ -410,7 +410,7 @@
      (should (macrostep-lax-looking-at ,string))
      (macrostep-collapse)))
 
-(ert-deftest macrostep-expand-c-macros ()
+(defun macrostep-expand-c-macros ()
   (with-temp-buffer
     (insert
      ;; A random example adapted from Emacs's src/lisp.h.