Tests(tox): Require tox <= 2.9.1

[ppu.git] / appveyor.yml

diff --git a/appveyor.yml b/appveyor.yml
index a2f112bc8e1f6e598639b5db85ec5a1024d844e9..509c25c5431c77a9b9b112db9cea59235c2bd746 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -50,7 +50,7 @@ install:
   - "python --version"
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
   - "python -m pip install --upgrade pip setuptools"
-  - "pip install --upgrade tox"
+  - "pip install --upgrade \"tox <= 2.9.1\""
   - "pip --version"
 
 # No build step - we don't have C extensions