diff --git a/vars/tox.groovy b/vars/tox.groovy
new file mode 100644
index 0000000..c26fcf3
--- /dev/null
+++ b/vars/tox.groovy
@@ -0,0 +1,7 @@
+def call() {
+    tmpdir = env.TMPDIR ? env.TMPDIR : '.'
+    sh """
+virtualenv -p python3 ${tmpdir}/venv/
+${tmpdir}/venv/bin/pip install tox
+PGPORT=`python -c 'import struct; import socket; s=socket.socket(); s.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, struct.pack("ii", 1, 0)); s.bind(("", 0)); print(s.getsockname()[1]); s.close()'` pg_virtualenv -o fsync=off ${tmpdir}/venv/bin/tox -rv"""
+}