diff --git a/src/gateway/session-message-events.test.ts b/src/gateway/session-message-events.test.ts
index 4d8f89de4f1..640c0da393e 100644
--- a/src/gateway/session-message-events.test.ts
+++ b/src/gateway/session-message-events.test.ts
@@ -24,11 +24,8 @@ let harness: Awaited<ReturnType<typeof createGatewaySuiteHarness>>;
 let subscribedOperatorWs:
   | Awaited<ReturnType<Awaited<ReturnType<typeof createGatewaySuiteHarness>>["openWs"]>>
   | undefined;
-let previousMinimalGateway: string | undefined;
 
 beforeAll(async () => {
-  previousMinimalGateway = process.env.OPENCLAW_TEST_MINIMAL_GATEWAY;
-  delete process.env.OPENCLAW_TEST_MINIMAL_GATEWAY;
   harness = await createGatewaySuiteHarness();
   subscribedOperatorWs = await harness.openWs();
   await connectOk(subscribedOperatorWs, {
@@ -43,11 +40,6 @@ afterAll(async () => {
   if (harness) {
     await harness.close();
   }
-  if (previousMinimalGateway === undefined) {
-    delete process.env.OPENCLAW_TEST_MINIMAL_GATEWAY;
-  } else {
-    process.env.OPENCLAW_TEST_MINIMAL_GATEWAY = previousMinimalGateway;
-  }
 });
 
 afterEach(async () => {