diff --git a/src/syscall/syscall_unix_test.go b/src/syscall/syscall_unix_test.go
index b1fe78deba..637aece439 100644
--- a/src/syscall/syscall_unix_test.go
+++ b/src/syscall/syscall_unix_test.go
@@ -180,6 +180,9 @@ func TestPassFD(t *testing.T) {
 		uc.Close()
 	})
 	_, oobn, _, _, err := uc.ReadMsgUnix(buf, oob)
+	if err != nil {
+		t.Fatalf("ReadMsgUnix: %v", err)
+	}
 	closeUnix.Stop()
 
 	scms, err := syscall.ParseSocketControlMessage(oob[:oobn])