diff --git a/ts/test-sdk.classes.testserver.ts b/ts/test-sdk.classes.testserver.ts
index 8badb8b..8e2e5a0 100644
--- a/ts/test-sdk.classes.testserver.ts
+++ b/ts/test-sdk.classes.testserver.ts
@@ -36,8 +36,8 @@ export class AgTestServer {
     if (this.server) {
       const previousServer = this.server;
       this.server = null;
-      await this.server.startedPromise;
-      await this.server.stop();
+      await previousServer.startedPromise;
+      await previousServer.stop();
     }
   }
 }