diff --git a/tests/main.test.ts b/tests/main.test.ts
index ef790a26..fcbc279e 100644
--- a/tests/main.test.ts
+++ b/tests/main.test.ts
@@ -98,6 +98,13 @@ describe("Action tests", () => {
           return HttpResponse.json({}, { status: 404 });
         },
         { once: true }
+      ),
+      http.get(
+        "https://api.github.com/repos/:org/:repo/issues/:id/timeline",
+        () => {
+          return HttpResponse.json([{ id: 1, created_at: lastActivityDate }]);
+        },
+        { once: true }
       )
     );
     jest.mock(actionsGithubPackage, () => ({