diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..8474b6c
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,44 @@
+// SPDX-FileCopyrightText: 2023 Olivier Charvin
+// SPDX-License-Identifier: CC0-1.0
+
+package main
+
+import (
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/sethvargo/go-githubactions"
+)
+
+func TestRun(t *testing.T) {
+	s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		default:
+			t.Errorf("unexpected request on %s", r.URL.Path)
+		case "/auth/time":
+		case "/domain/zone/FAKEVALUE-INPUT_DOMAIN/record/FAKEVALUE-INPUT_RECORD-ID":
+			buf, err := io.ReadAll(r.Body)
+			if err != nil {
+				t.Errorf("could not read request body: %v", err)
+			}
+			if string(buf) != `{"subDomain":"FAKEVALUE-INPUT_SUBDOMAIN","target":"\"FAKEVALUE-INPUT_VALUE\""}` {
+				t.Errorf("unexpected body: %s", string(buf))
+			}
+		}
+	}))
+	t.Cleanup(s.Close)
+	s.Listener.Addr()
+	action := githubactions.New(githubactions.WithGetenv(func(key string) string {
+		switch key {
+		case "INPUT_OVH-ENDPOINT":
+			return "http://" + s.Listener.Addr().String()
+		}
+		return "FAKEVALUE-" + key
+	}))
+	err := run(action)
+	if err != nil {
+		t.Fatal(err)
+	}
+}