diff --git a/.travis.yml b/.travis.yml
index c4edc30d8..1bd8c3101 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,7 @@ env:
     # running pip install.
     - PIP_WHEEL_DIR=$HOME/.cache/pip/wheels
     - PIP_FIND_LINKS=file://$HOME/.cache/pip/wheels
+    - PIP_DOWNLOAD_CACHE=$HOME/.cache/pip
   matrix:
     - TOX_ENV=py27-flake8
     - TOX_ENV=py27-docs
diff --git a/pip_install.sh b/pip_install.sh
deleted file mode 100755
index 07826b602..000000000
--- a/pip_install.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-echo "$@"
-pip wheel "$@"
-pip install --upgrade "$@"
diff --git a/tox.ini b/tox.ini
index 71bb22eab..5119bbb37 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,10 +6,12 @@ envlist =
        {py27,py32,py33,py34}-django{17,18beta}
 
 [testenv]
-install_command = ./pip_install.sh {opts} {packages}
 commands = ./runtests.py --fast
 setenv =
        PYTHONDONTWRITEBYTECODE=1
+       PIP_WHEEL_DIR=$HOME/.cache/pip/wheels
+       PIP_FIND_LINKS=file://$HOME/.cache/pip/wheels
+       PIP_DOWNLOAD_CACHE=$HOME/.cache/pi
 deps =
        django14: Django==1.4.11  # Should track minimum supported
        django15: Django==1.5.6  # Should track minimum supported