diff --git a/src/agent/mock-manager.ts b/src/agent/mock-manager.ts
index ab51417..821f730 100644
--- a/src/agent/mock-manager.ts
+++ b/src/agent/mock-manager.ts
@@ -474,9 +474,9 @@ export class MockAgentManager implements AgentManager {
     if (!record) {
       throw new Error(`Agent '${agentId}' not found`);
     }
-    // In mock, we just mark it as dismissed in memory
-    // Real implementation would update database
-    record.info.updatedAt = new Date();
+    const now = new Date();
+    record.info.userDismissedAt = now;
+    record.info.updatedAt = now;
   }
 
   /**