diff --git a/src/cli/gateway-cli/run.option-collisions.test.ts b/src/cli/gateway-cli/run.option-collisions.test.ts
index d7031350db04..b9d3490b7066 100644
--- a/src/cli/gateway-cli/run.option-collisions.test.ts
+++ b/src/cli/gateway-cli/run.option-collisions.test.ts
@@ -119,9 +119,13 @@ vi.mock("../../infra/restart-sentinel.js", () => ({
   writeRestartSentinel: (payload: unknown) => writeRestartSentinel(payload),
 }));
 
-vi.mock("../../infra/supervisor-markers.js", () => ({
-  detectRespawnSupervisor: () => null,
-}));
+vi.mock("../../infra/supervisor-markers.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../../infra/supervisor-markers.js")>();
+  return {
+    ...actual,
+    detectRespawnSupervisor: () => null,
+  };
+});
 
 vi.mock("../../logging/console.js", () => ({
   setConsoleSubsystemFilter: (filters: string[]) => setConsoleSubsystemFilter(filters),