diff --git a/.travis.yml b/.travis.yml
index 9a618fc2b..c4319bfcb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,8 +29,8 @@ script:
   - coverage erase
   - python setup.py clean
   - python setup.py build_ext --inplace
-  - coverage run --append --omit=/usr/* selftest.py
-  - coverage run --append --omit=/usr/* Tests/run.py
+  - coverage run --append --source=PIL selftest.py
+  - coverage run --append --source=PIL Tests/run.py
 
 after_success:
   - coverage report