fix: flaky worker-sandbox tests

worker-sandbox/src/lib.rs

@@ -467,7 +467,7 @@ pub async fn main(req: Request, env: Env, _ctx: worker::Context) -> Result<Respo
             let signal = controller.signal();
 
             let fetch_fut = async {
-                let fetch = Fetch::Url("http://localhost:8787/wait/200".parse().unwrap());
+                let fetch = Fetch::Url("http://localhost:8787/wait/2000".parse().unwrap());
                 fetch.send_with_signal(&signal).await
             };
             let delay_fut = async {

worker-sandbox/tests/requests.rs

@@ -262,7 +262,7 @@ fn request_init_fetch() {
 #[test]
 fn cancelled_fetch() {
     let body = get("cancelled-fetch", |r| r).text().unwrap();
-    assert_eq!(body, "AbortError: The operation was aborted");
+    assert!(body.starts_with("AbortError: The operation was aborted"));
 }
 
 #[test]