diff --git a/openstack-common.conf b/openstack-common.conf
index e4461d82..f305e6f2 100644
--- a/openstack-common.conf
+++ b/openstack-common.conf
@@ -2,6 +2,7 @@
 
 # The list of modules to copy from oslo-incubator.git
 module=fixture.config
+script = tools/run_cross_tests.sh
 
 # The base module to hold the copy of openstack.common
 base=oslo.db
diff --git a/tools/run_cross_tests.sh b/tools/run_cross_tests.sh
new file mode 100755
index 00000000..5e7bc118
--- /dev/null
+++ b/tools/run_cross_tests.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+#
+# Run cross-project tests
+#
+# Usage:
+#
+#   run_cross_tests.sh project_dir venv
+
+# Fail the build if any command fails
+set -e
+
+project_dir="$1"
+venv="$2"
+
+if [ -z "$project_dir" -o -z "$venv" ]
+then
+    cat - <<EOF
+ERROR: Missing argument(s)
+
+Usage:
+
+  $0 PROJECT_DIR VIRTUAL_ENV
+
+Example, run the python 2.7 tests for python-neutronclient:
+
+  $0 /opt/stack/python-neutronclient py27
+
+EOF
+    exit 1
+fi
+
+# Set up the virtualenv without running the tests
+(cd $project_dir && tox --notest -e $venv)
+
+tox_envbin=$project_dir/.tox/$venv/bin
+
+our_name=$(python setup.py --name)
+
+# Replace the pip-installed package with the version in our source
+# tree. Look to see if we are already installed before trying to
+# uninstall ourselves, to avoid failures from packages that do not use us
+# yet.
+if $tox_envbin/pip freeze | grep -q $our_name
+then
+    $tox_envbin/pip uninstall -y $our_name
+fi
+$tox_envbin/pip install -U .
+
+# Run the tests
+(cd $project_dir && tox -e $venv)
+result=$?
+
+
+# The below checks are modified from
+# openstack-infra/config/modules/jenkins/files/slave_scripts/run-unittests.sh.
+
+# They expect to be run in the project being tested.
+cd $project_dir
+
+echo "Begin pip freeze output from test virtualenv:"
+echo "======================================================================"
+.tox/$venv/bin/pip freeze
+echo "======================================================================"
+
+# We only want to run the next check if the tool is installed, so look
+# for it before continuing.
+if [ -f /usr/local/jenkins/slave_scripts/subunit2html.py -a -d ".testrepository" ] ; then
+    if [ -f ".testrepository/0.2" ] ; then
+        cp .testrepository/0.2 ./subunit_log.txt
+    elif [ -f ".testrepository/0" ] ; then
+        .tox/$venv/bin/subunit-1to2 < .testrepository/0 > ./subunit_log.txt
+    fi
+    .tox/$venv/bin/python /usr/local/jenkins/slave_scripts/subunit2html.py ./subunit_log.txt testr_results.html
+    gzip -9 ./subunit_log.txt
+    gzip -9 ./testr_results.html
+
+    export PYTHON=.tox/$venv/bin/python
+    set -e
+    rancount=$(.tox/$venv/bin/testr last | sed -ne 's/Ran \([0-9]\+\).*tests in.*/\1/p')
+    if [ "$rancount" -eq "0" ] ; then
+        echo
+        echo "Zero tests were run. At least one test should have been run."
+        echo "Failing this test as a result"
+        echo
+        exit 1
+    fi
+fi
+
+# If we make it this far, report status based on the tests that were
+# run.
+exit $result