diff --git a/appveyor.yml b/appveyor.yml
index 005e0d1a..96da08c9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,4 +20,5 @@ install:
   - "%PYTHON%/Scripts/pip.exe install -U -r requirements.txt"
 
 test_script:
+  - "%PYTHON%/python.exe -m flake8"
   - "%PYTHON%/Scripts/py.test.exe -sv"