diff --git a/.appveyor.yml b/.appveyor.yml
index e380db569..be8b46ab2 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -14,4 +14,4 @@ install:
   - C:\Python27\python -u scripts\dev\ci_install.py
 
 test_script:
-  - C:\Python34\Scripts\tox -e %TESTENV%
+  - C:\Python34\Scripts\tox -e %TESTENV% -- -p "no:sugar" tests