diff --git a/packages/paperclip-runner/src/drivers/acpx/profile-compatibility.test.ts b/packages/paperclip-runner/src/drivers/acpx/profile-compatibility.test.ts
index 5945a843d9..4af46c0f83 100644
--- a/packages/paperclip-runner/src/drivers/acpx/profile-compatibility.test.ts
+++ b/packages/paperclip-runner/src/drivers/acpx/profile-compatibility.test.ts
@@ -5,6 +5,7 @@ import { isSupportedAcpxProfileVersion } from "./profile-compatibility.js";
 describe("historical ACPX profile decoding", () => {
   it("retains each provider's existing revision boundary", () => {
     expect(isSupportedAcpxProfileVersion("cursor", 15)).toBe(true);
+    expect(isSupportedAcpxProfileVersion("cursor", 16)).toBe(false);
     for (const agent of ["pi", "copilot"]) {
       expect(isSupportedAcpxProfileVersion(agent, 16)).toBe(true);
       const current = QUALIFIED_ACPX_PROFILE_DATA[agent as "pi" | "copilot"].agentProfileVersion;