diff --git a/go/types/stdlib_test.go b/go/types/stdlib_test.go
index 02d00dfa77..d6aa82ac53 100644
--- a/go/types/stdlib_test.go
+++ b/go/types/stdlib_test.go
@@ -122,7 +122,7 @@ func TestStdTest(t *testing.T) {
 
 	// test/recover4.go is only built for Linux and Darwin.
 	// TODO(gri) Remove once tests consider +build tags (issue 10370).
-	if runtime.GOOS != "linux" || runtime.GOOS != "darwin" {
+	if runtime.GOOS != "linux" && runtime.GOOS != "darwin" {
 		return
 	}