diff --git a/test-requirements.txt b/test-requirements.txt
index d3ea4961..9b3ac4f2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,8 +2,6 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
--e git://github.com/openstack/horizon.git#egg=horizon
-
 hacking<0.11,>=0.10.0
 coverage>=3.6 # Apache-2.0
 ddt>=1.0.1 # MIT
diff --git a/tools/install_venv.py b/tools/install_venv.py
index 8550e2c6..bcb1f93d 100644
--- a/tools/install_venv.py
+++ b/tools/install_venv.py
@@ -32,6 +32,7 @@ VENV = os.path.join(ROOT, '.venv')
 WITH_VENV = os.path.join(ROOT, 'tools', 'with_venv.sh')
 PIP_REQUIRES = os.path.join(ROOT, 'requirements.txt')
 TEST_REQUIRES = os.path.join(ROOT, 'test-requirements.txt')
+PIP_INSTALL_WRAPPER = os.path.join(ROOT, 'tools', 'pip_install.sh')
 
 
 def die(message, *args):
@@ -113,11 +114,16 @@ def pip_install(*args):
     run_command(args, redirect_output=False)
 
 
+def pip_install_with_horizon(*args):
+    args = [WITH_VENV, PIP_INSTALL_WRAPPER, 'unconstrained'] + list(args)
+    run_command(args, redirect_output=False)
+
+
 def install_dependencies(venv=VENV):
     print "Installing dependencies..."
     print "(This may take several minutes, don't panic)"
-    pip_install('-r', TEST_REQUIRES)
-    pip_install('-r', PIP_REQUIRES)
+    pip_install_with_horizon('-r', TEST_REQUIRES)
+    pip_install_with_horizon('-r', PIP_REQUIRES)
 
     # Tell the virtual env how to "import dashboard"
     py = 'python%d.%d' % (sys.version_info[0], sys.version_info[1])
diff --git a/tools/pip_install.sh b/tools/pip_install.sh
new file mode 100755
index 00000000..b1003edf
--- /dev/null
+++ b/tools/pip_install.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# The original script is borrowed from neutron-* repos.
+
+# Many of horizon's repos suffer from the problem of depending on horizon,
+# but it not existing on pypi.
+
+# This wrapper for tox's package installer will use the existing package
+# if it exists, else use zuul-cloner if that program exists, else grab it
+# from horizon master via a hard-coded URL. That last case should only
+# happen with devs running unit tests locally.
+
+# From the tox.ini config page:
+# install_command=ARGV
+# default:
+# pip install {opts} {packages}
+
+ZUUL_CLONER=/usr/zuul-env/bin/zuul-cloner
+BRANCH_NAME=master
+horizon_installed=$(echo "import horizon" | python 2>/dev/null ; echo $?)
+
+set -e
+
+install_cmd="pip install"
+if [ "$1" = "constrained" ]; then
+    install_cmd="$install_cmd $2"
+    shift
+fi
+shift
+
+if [ $horizon_installed -eq 0 ]; then
+    echo "ALREADY INSTALLED" > /tmp/tox_install.txt
+    echo "Horizon already installed; using existing package"
+elif [ -x "$ZUUL_CLONER" ]; then
+    export ZUUL_BRANCH=${ZUUL_BRANCH-$BRANCH}
+    echo "ZUUL CLONER" > /tmp/tox_install.txt
+    cwd=$(/bin/pwd)
+    cd /tmp
+    $ZUUL_CLONER --cache-dir \
+        /opt/git \
+        --branch $BRANCH_NAME \
+        git://git.openstack.org \
+        openstack/horizon
+    cd openstack/horizon
+    $install_cmd -e .
+    cd "$cwd"
+else
+    echo "PIP HARDCODE" > /tmp/tox_install.txt
+    if [ -z "$HORIZON_PIP_LOCATION" ]; then
+        HORIZON_PIP_LOCATION="git+https://git.openstack.org/openstack/horizon@$BRANCH_NAME#egg=horizon"
+    fi
+    $install_cmd -U -e ${HORIZON_PIP_LOCATION}
+fi
+
+$install_cmd -U $*
+exit $?
diff --git a/tox.ini b/tox.ini
index 138f2665..a4c4137c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ skipsdist = True
 
 [testenv]
 usedevelop = True
-install_command = pip install -U {opts} {packages}
+install_command = {toxinidir}/tools/pip_install.sh unconstrained {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt