--- test/mitmproxy/test_version.py.old	2020-08-02 12:01:29.000000000 +0200
+++ test/mitmproxy/test_version.py	2020-08-02 12:00:02.000000000 +0200
@@ -20,6 +20,7 @@
     version.VERSION = "3.0.0rc2"
 
     with mock.patch('subprocess.check_output') as m:
+      with mock.patch('subprocess.run') as do_not_fail:
         m.return_value = b"tag-0-cafecafe"
         assert version.get_dev_version() == "3.0.0rc2"