diff --git a/src/net/timeout_test.go b/src/net/timeout_test.go
index 5832306591..98e3164fb9 100644
--- a/src/net/timeout_test.go
+++ b/src/net/timeout_test.go
@@ -996,7 +996,6 @@ func TestReadWriteDeadlineRace(t *testing.T) {
 	if testing.Short() {
 		N = 50
 	}
-	defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
 
 	ln, err := newLocalListener("tcp")
 	if err != nil {