diff --git a/scripts/ci/before_install.sh b/scripts/ci/before_install.sh
index bad644d54..66469fd2d 100644
--- a/scripts/ci/before_install.sh
+++ b/scripts/ci/before_install.sh
@@ -7,6 +7,7 @@ if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
     # NOTE: used to install and run our style checking tools
     osx_python_ver=3.6.2
     eval "$(pyenv init -)"
+    pyenv install --list
     pyenv install --skip-existing --keep --verbose $osx_python_ver
     pyenv shell $osx_python_ver
     python --version