1 files changed, 1 insertions, 0 deletions

diff --git a/appveyor.yml b/appveyor.yml
index c9bb8ee..4817dac 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,6 @@
 version: 1.0.{build}

 environment:

+  APPVEYOR: TRUE

   matrix:

   - TOXENV: py27

   - TOXENV: py35