diff --git a/__tests__/add-pr-comment.test.ts b/__tests__/add-pr-comment.test.ts
index f4639ee..51f9aa4 100644
--- a/__tests__/add-pr-comment.test.ts
+++ b/__tests__/add-pr-comment.test.ts
@@ -90,7 +90,7 @@ describe('add-pr-comment action', () => {
   afterAll(() => server.close())
 
   beforeEach(() => {
-    inputs = defaultInputs
+    inputs = { ...defaultInputs }
     issueNumber = defaultIssueNumber
     repoFullName = defaultRepoFullName