diff --git a/.appveyor.yml b/.appveyor.yml
index 7d5c650d5..d3a790aaa 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -14,6 +14,7 @@ environment:
 
 install:
   - C:\Python27\python -u scripts\dev\ci\appveyor_install.py
+  - set PATH=%PATH%;C:\Python36
 
 test_script:
   - C:\Python34\Scripts\tox -e %TESTENV%