diff --git a/.travis.yml b/.travis.yml
index cc4c2ef..1cde667 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,18 @@ jobs:
     - os: linux
       dist: trusty
       env: R_CODECOV=true
-    - os: osx
+    - stage: precache
+      os: osx
+      osx_image: xcode8.3
+      script: true
+    - stage: osxdeathmarch
+      os: osx
+      osx_image: xcode8.3
+#before_install:
+#  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install llvm &&
+#    export PATH="/usr/local/opt/llvm/bin:$PATH" &&
+#    export LDFLAGS="-L/usr/local/opt/llvm/lib" &&
+#    export CFLAGS="-I/usr/local/opt/llvm/include"; fi
 r_packages:
 - covr
 after_success: