diff --git a/tools/with_venv.sh b/tools/with_venv.sh
index 94e05c12..262b86d4 100755
--- a/tools/with_venv.sh
+++ b/tools/with_venv.sh
@@ -1,7 +1,8 @@
 #!/bin/bash
 tools_path=${tools_path:-$(dirname $0)}
 venv_path=${venv_path:-${tools_path}}
-venv_dir=${venv_name:-/../.venv}
+tox_env=$(cd ${venv_path} && find ../.tox -maxdepth 1 -name "py*" | sort | tail -n1)
+venv_dir=${venv_name:-${tox_env}}
 TOOLS=${tools_path}
 VENV=${venv:-${venv_path}/${venv_dir}}
 source ${VENV}/bin/activate && "$@"