diff --git a/main_test.go b/main_test.go
index 418e6b6..5e1acf4 100644
--- a/main_test.go
+++ b/main_test.go
@@ -39,6 +39,8 @@ func TestRun(t *testing.T) {
 	t.Cleanup(s.Close)
 	action := githubactions.New(githubactions.WithGetenv(func(key string) string {
 		switch key {
+		case "GITHUB_OUTPUT":
+			return os.Getenv(key)
 		case "INPUT_OVH-ENDPOINT":
 			return "http://" + s.Listener.Addr().String()
 		}