diff --git a/.gitignore b/.gitignore
index b2e0c88..6c53d83 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,6 +45,7 @@ htmlcov/
 .coverage
 .coverage.*
 .cache
+.pytest_cache/
 
 # virtualenv
 venv/
diff --git a/tox.ini b/tox.ini
index 63a16b9..8cb330f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,12 @@
 [tox]
-envlist = py26, py27, py33, py34, py35, py36, flake8
+envlist = py27, py34, py35, py36, flake8
 
 [testenv]
 deps =
     pytest
     pytest-cov
 commands =
-    pip install -r requirements.txt --use-wheel
+    pip install -r requirements.txt
     py.test --junitxml=junit-{envname}.xml --cov-report xml tests.py
 
 [testenv:flake8]