diff --git a/test/abi/regabipragma.go b/test/abi/regabipragma.go
index 6a1b193..e7ecd58 100644
--- a/test/abi/regabipragma.go
+++ b/test/abi/regabipragma.go
@@ -1,4 +1,4 @@
-// runindir
+// runindir -gcflags=-c=1
 // +build !windows
 
 // Copyright 2021 The Go Authors. All rights reserved.
diff --git a/test/run.go b/test/run.go
index 116f983..dba4d16 100644
--- a/test/run.go
+++ b/test/run.go
@@ -902,6 +902,7 @@
 		if *linkshared {
 			cmd = append(cmd, "-linkshared")
 		}
+		cmd = append(cmd, flags...)
 		cmd = append(cmd, ".")
 		out, err := runcmd(cmd...)
 		if err != nil {