diff --git a/tests/env.py b/tests/env.py
index f246b08..5cded44 100644
--- a/tests/env.py
+++ b/tests/env.py
@@ -10,3 +10,5 @@
 PYPY = platform.python_implementation() == "PyPy"
 
 PY2 = sys.version_info.major == 2
+
+PY = sys.version_info