diff --git a/requirements.txt b/requirements.txt
index b1ed3cb6a..c892d4e71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,4 @@ oslo.service!=1.28.1,>=1.24.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 oslo.privsep>=1.23.0 # Apache-2.0
 pyroute2>=0.4.21;sys_platform!='win32' # Apache-2.0 (+ dual licensed GPL2)
-# This project does depend on neutron as a library, but the
-# openstack tooling does not play nicely with projects that
-# are not publicly available in pypi.
-# -e git+https://git.openstack.org/openstack/neutron#egg=neutron
+neutron>=12.0.0  # Apache-2.0
diff --git a/tools/tox_install.sh b/tools/tox_install.sh
deleted file mode 100755
index fb31ec263..000000000
--- a/tools/tox_install.sh
+++ /dev/null
@@ -1,70 +0,0 @@
-#!/usr/bin/env bash
-
-# Many of neutron's repos suffer from the problem of depending on neutron,
-# 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 neutron 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
-neutron_installed=$(echo "import neutron" | python 2>/dev/null ; echo $?)
-NEUTRON_DIR=$HOME/neutron
-
-set -e
-set -x
-
-install_cmd="pip install -c$1"
-shift
-
-# The devstack based functional tests have neutron checked out in
-# $NEUTRON_DIR on the test systems - with the change to test in it.
-# Use this directory if it exists, so that this script installs the
-# neutron version to test here.
-# Note that the functional tests use sudo to run tox and thus
-# variables used for zuul-cloner to check out the correct version are
-# lost.
-if [ -d "$NEUTRON_DIR" ]; then
-    echo "FOUND Neutron code at $NEUTRON_DIR - using"
-    $install_cmd -U -e $NEUTRON_DIR
-elif [ $neutron_installed -eq 0 ]; then
-    echo "ALREADY INSTALLED" > /tmp/tox_install.txt
-    location=$(python -c "import neutron; print(neutron.__file__)")
-    echo "ALREADY INSTALLED at $location"
-
-    echo "Neutron already installed; using existing package"
-elif [ -x "$ZUUL_CLONER" ]; then
-    echo "ZUUL CLONER" > /tmp/tox_install.txt
-    # Make this relative to current working directory so that
-    # git clean can remove it. We cannot remove the directory directly
-    # since it is referenced after $install_cmd -e.
-    mkdir -p .tmp
-    NEUTRON_DIR=$(/bin/mktemp -d -p $(pwd)/.tmp)
-    pushd $NEUTRON_DIR
-    $ZUUL_CLONER --cache-dir \
-        /opt/git \
-        --branch $BRANCH_NAME \
-        git://git.openstack.org \
-        openstack/neutron
-    cd openstack/neutron
-    $install_cmd -e .
-    popd
-else
-    echo "PIP HARDCODE" > /tmp/tox_install.txt
-    if [ -z "$NEUTRON_GIT_REPO" ]; then
-        NEUTRON_GIT_REPO="https://git.openstack.org/openstack/neutron"
-    fi
-    SRC_DIR="$VIRTUAL_ENV/src/neutron"
-    git clone --depth 1 --branch $BRANCH_NAME $NEUTRON_GIT_REPO $SRC_DIR
-    $install_cmd -U -e $SRC_DIR
-fi
-
-$install_cmd -U $*
-exit $?
diff --git a/tox.ini b/tox.ini
index 16f745ae5..6c5997da2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,9 +7,8 @@ skipsdist = True
 setenv = VIRTUAL_ENV={envdir}
          PYTHONWARNINGS=default::DeprecationWarning
 usedevelop = True
-install_command =
-  {toxinidir}/tools/tox_install.sh {env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
-deps = -r{toxinidir}/requirements.txt
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+       -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 whitelist_externals = sh find
 commands =