diff --git a/.travis.yml b/.travis.yml
index 1e631ef00..b8df29125 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,8 +29,9 @@ before_install:
 
 install:
   - python3 setup.py build
-  - python3 setup.py install
   - python3 setup.py bdist_wheel
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then python3 setup.py install; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo python3 setup.py installs; fi
 
 script:
   - python3 -c 'import klayout.db as db; print(dir(db))'