diff --git a/lib/index.test-d.ts b/lib/index.test-d.ts
index a23f25e6..a3d8d9bd 100644
--- a/lib/index.test-d.ts
+++ b/lib/index.test-d.ts
@@ -8,3 +8,12 @@ expectType<Buffer>((await curl<Buffer>('http://a.com', {})).data);
 expectType<string>((await curl<string>('http://a.com', {
   method: 'HEAD',
 })).data);
+
+// HttpClientResponse
+const res = await curl<Buffer>('http://a.com');
+expectType<number | undefined>(res.res.timing?.queuing);
+expectType<number | undefined>(res.res.timing?.dnslookup);
+expectType<number | undefined>(res.res.timing?.connected);
+expectType<number | undefined>(res.res.timing?.requestSent);
+expectType<number | undefined>(res.res.timing?.waiting);
+expectType<number | undefined>(res.res.timing?.contentDownload);