diff --git a/src/net/http/serve_test.go b/src/net/http/serve_test.go
index d301d15eb1b49bf018bca88bbc583c2f2e01fe4d..7d964b309eac4040a6e1e0c2ac6d6915017243ea 100644
--- a/src/net/http/serve_test.go
+++ b/src/net/http/serve_test.go
@@ -929,7 +929,6 @@ func (c *blockingRemoteAddrConn) RemoteAddr() net.Addr {
 
 // Issue 12943
 func TestServerAllowsBlockingRemoteAddr(t *testing.T) {
-	setParallel(t)
 	defer afterTest(t)
 	ts := httptest.NewUnstartedServer(HandlerFunc(func(w ResponseWriter, r *Request) {
 		fmt.Fprintf(w, "RA:%s", r.RemoteAddr)