diff --git a/src/config/config.hooks-mapping-agentid.test.ts b/src/config/config.hooks-mapping-agentid.test.ts
index a19b1863a..de1d27920 100644
--- a/src/config/config.hooks-mapping-agentid.test.ts
+++ b/src/config/config.hooks-mapping-agentid.test.ts
@@ -48,8 +48,9 @@ describe("hooks.mappings agentId validation", () => {
     });
     expect(res.ok).toBe(false);
     if (!res.ok) {
-      expect(res.error).toContain("nonexistent-agent");
-      expect(res.error).toContain("not in agents.list");
+      const messages = res.issues.map((i) => i.message).join(" ");
+      expect(messages).toContain("nonexistent-agent");
+      expect(messages).toContain("not in agents.list");
     }
   });