diff --git a/setup.cfg b/setup.cfg
index 0ea9576f6..e9e464aed 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -53,7 +53,7 @@ putty-ignore =
     /# pragma: no mccabe/ : +C901
     tests/*/test_*.py : +D100,D101,D401
     tests/unit/browser/http/test_content_disposition.py : +D400
-    scripts/dev/ci/install.py : +C901,FI53
+    scripts/dev/ci/appveyor_install.py : +FI53
 copyright-check = True
 copyright-regexp = # Copyright [\d-]+ .*
 copyright-min-file-size = 110