diff --git a/tests/integration/api_activitypub_repository_test.go b/tests/integration/api_activitypub_repository_test.go
index 748c77bef0..60d7e32822 100644
--- a/tests/integration/api_activitypub_repository_test.go
+++ b/tests/integration/api_activitypub_repository_test.go
@@ -59,7 +59,7 @@ func TestActivityPubMissingRepository(t *testing.T) {
 	})
 }
 
-func TestActivityPubRepositoryInbox(t *testing.T) {
+func TestActivityPubRepositoryInboxValid(t *testing.T) {
 	setting.Federation.Enabled = true
 	testWebRoutes = routers.NormalRoutes()
 	defer func() {
@@ -84,16 +84,42 @@ func TestActivityPubRepositoryInbox(t *testing.T) {
 		repoInboxUrl := fmt.Sprintf("%s/api/v1/activitypub/repository-id/%v/inbox",
 			srv.URL, repositoryID)
 
-		// valid activity request succeeds
 		activity := []byte(fmt.Sprintf(`{"type":"Like","startTime":"2024-03-27T00:00:00Z","actor":"%s/api/v1/activitypub/user-id/2","object":"%s/api/v1/activitypub/repository-id/%v"}`,
 			srv.URL, srv.URL, repositoryID))
 		resp, err := c.Post(activity, repoInboxUrl)
 		assert.NoError(t, err)
 		assert.Equal(t, http.StatusNoContent, resp.StatusCode)
-
-		// invalid activity request succeeds
-		activity = []byte(fmt.Sprintf(`{"type":"Wrong"}`))
-		resp, err = c.Post(activity, repoInboxUrl)
-		assert.Error(t, err)
+	})
+}
+
+func TestActivityPubRepositoryInboxInvalid(t *testing.T) {
+	setting.Federation.Enabled = true
+	testWebRoutes = routers.NormalRoutes()
+	defer func() {
+		setting.Federation.Enabled = false
+		testWebRoutes = routers.NormalRoutes()
+	}()
+
+	srv := httptest.NewServer(testWebRoutes)
+	defer srv.Close()
+
+	onGiteaRun(t, func(*testing.T, *url.URL) {
+		appURL := setting.AppURL
+		setting.AppURL = srv.URL + "/"
+		defer func() {
+			setting.Database.LogSQL = false
+			setting.AppURL = appURL
+		}()
+		actionsUser := user.NewActionsUser()
+		repositoryID := 2
+		c, err := activitypub.NewClient(db.DefaultContext, actionsUser, "not used")
+		assert.NoError(t, err)
+		repoInboxUrl := fmt.Sprintf("%s/api/v1/activitypub/repository-id/%v/inbox",
+			srv.URL, repositoryID)
+
+		activity := []byte(fmt.Sprintf(`{"type":"Wrong"}`))
+		resp, err := c.Post(activity, repoInboxUrl)
+		assert.NoError(t, err)
+		assert.Equal(t, http.StatusNotAcceptable, resp.StatusCode)
 	})
 }