diff --git a/src/agents/pi-embedded-runner/run/auth-controller.test.ts b/src/agents/pi-embedded-runner/run/auth-controller.test.ts
index e6feeb4a5c6..c786dfbbc31 100644
--- a/src/agents/pi-embedded-runner/run/auth-controller.test.ts
+++ b/src/agents/pi-embedded-runner/run/auth-controller.test.ts
@@ -494,9 +494,7 @@ describe("createEmbeddedRunAuthController", () => {
       expect(setRuntimeApiKey).toHaveBeenCalledWith("custom-openai", "__aws_sdk_auth__");
       expect(harness.runtimeAuthState).toBeNull();
       expect(warn).toHaveBeenCalledWith(
-        expect.stringContaining(
-          "prepareProviderRuntimeAuth failed for custom-openai, falling back to sentinel: No runtime auth plugin",
-        ),
+        "prepareProviderRuntimeAuth failed for custom-openai, falling back to sentinel: No runtime auth plugin",
       );
     });
   });