diff --git a/server/src/__tests__/issue-comment-reopen-routes.test.ts b/server/src/__tests__/issue-comment-reopen-routes.test.ts
index 4bcc6a12b84..d388d78e213 100644
--- a/server/src/__tests__/issue-comment-reopen-routes.test.ts
+++ b/server/src/__tests__/issue-comment-reopen-routes.test.ts
@@ -590,10 +590,20 @@ describe.sequential("issue comment reopen routes", () => {
     ["resume", { resume: true }],
     ["reopen", { reopen: true }],
   ])(
-    "rejects mention-granted non-assignee agent POST comments on closed issues with %s intent",
+    "allows mention-granted non-assignee agent POST comments on closed issues with %s intent without reopening",
     async (_name, intent) => {
       const mentionedAgentId = "33333333-3333-4333-8333-333333333333";
       mockIssueService.getById.mockResolvedValue(makeIssue("done"));
+      mockIssueService.addComment.mockResolvedValue({
+        id: "comment-1",
+        issueId: "11111111-1111-4111-8111-111111111111",
+        companyId: "company-1",
+        body: "Please continue this closed issue.",
+        createdAt: new Date(),
+        updatedAt: new Date(),
+        authorAgentId: mentionedAgentId,
+        authorUserId: null,
+      });
       mockAccessService.decide.mockImplementation(async (input: { action?: string }) => {
         const allowed = input.action === "issue:comment";
         return {
@@ -608,12 +618,11 @@ describe.sequential("issue comment reopen routes", () => {
         .post("/api/issues/11111111-1111-4111-8111-111111111111/comments")
         .send({ body: "Please continue this closed issue.", ...intent });
 
-      expect(res.status, JSON.stringify(res.body)).toBe(403);
-      expect(res.body.error).toBe("Issue is outside this actor's authorization boundary");
+      expect(res.status, JSON.stringify(res.body)).toBe(201);
       expect(mockAccessService.decide).toHaveBeenCalledWith(expect.objectContaining({ action: "issue:comment" }));
-      expect(mockAccessService.decide).toHaveBeenCalledWith(expect.objectContaining({ action: "issue:mutate" }));
+      expect(mockAccessService.decide).not.toHaveBeenCalledWith(expect.objectContaining({ action: "issue:mutate" }));
       expect(mockIssueService.update).not.toHaveBeenCalled();
-      expect(mockIssueService.addComment).not.toHaveBeenCalled();
+      expect(mockIssueService.addComment).toHaveBeenCalled();
       expect(mockHeartbeatService.wakeup).not.toHaveBeenCalled();
     },
   );