diff --git a/tox.ini b/tox.ini
index bc20613..604c295 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,6 +34,8 @@ deps = black
 commands = black --check --diff --include "^[^.].*\.py$" .
 
 [testenv:py26]
+install_command = pip install {opts} {packages}
+list_dependencies_command = pip freeze
 basepython = python2.6
 passenv = {[base]passenv}
 setenv =