diff --git a/UnitTests/before_install.sh b/UnitTests/before_install.sh
index 28c5e23e..e2626bd8 100644
--- a/UnitTests/before_install.sh
+++ b/UnitTests/before_install.sh
@@ -32,4 +32,5 @@ elif [[ "$TESTOS" == "OSX" ]]; then
   sudo pip3 install flake8 --upgrade --no-cache-dir
   sudo pip3 install pyyaml --upgrade --no-cache-dir
   sudo pip3 install ford --upgrade --no-cache-dir
+  sudo pip3 install distutils --upgrade --no-cache-dir
 fi