diff --git a/test/mitmproxy/proxy/protocol/test_http1.py b/test/mitmproxy/proxy/protocol/test_http1.py
index 07cd7dcc0..b642afb3d 100644
--- a/test/mitmproxy/proxy/protocol/test_http1.py
+++ b/test/mitmproxy/proxy/protocol/test_http1.py
@@ -65,6 +65,7 @@ class TestExpectHeader(tservers.HTTPProxyTest):
         assert resp.status_code == 200
 
         client.finish()
+        client.close()
 
 
 class TestHeadContentLength(tservers.HTTPProxyTest):