diff --git a/tests/dev_server.spec.ts b/tests/dev_server.spec.ts
index aaf8489..74aabf5 100644
--- a/tests/dev_server.spec.ts
+++ b/tests/dev_server.spec.ts
@@ -93,7 +93,7 @@ test.group('DevServer', () => {
     await devServer.startAndWatch(ts)
     cleanup(() => devServer.close())
 
-    await sleep(100)
+    await sleep(1000)
     await fs.create('index.ts', 'foo')
   }).waitForDone()