diff --git a/test/typeparam/issue48424.go b/test/typeparam/issue48424.go
index b1238df697..3253e6457b 100644
--- a/test/typeparam/issue48424.go
+++ b/test/typeparam/issue48424.go
@@ -1,4 +1,4 @@
-// run
+// run -gcflags=-G=3
 
 // Copyright 2021 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style