diff --git a/packages/backend-openapi-utils/src/testUtils.ts b/packages/backend-openapi-utils/src/testUtils.ts
index ebe22fce26..11716050db 100644
--- a/packages/backend-openapi-utils/src/testUtils.ts
+++ b/packages/backend-openapi-utils/src/testUtils.ts
@@ -29,7 +29,9 @@ const proxiesToCleanup: Proxy[] = [];
  */
 export async function wrapServer(app: Express): Promise<Server> {
   const proxy = new Proxy();
+  proxiesToCleanup.push(proxy);
   await proxy.setup();
+
   const server = app.listen(proxy.forwardTo.port);
   await proxy.initialize(`http://localhost:${proxy.forwardTo.port}`, server);