diff --git a/.travis.yml b/.travis.yml
index 7776087..8ea3b31 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,5 +11,6 @@ python:
 before_install:
   - python setup.py bdist_wheel --include-test-subpackage
   - pip install dist/feedgen*
+  - rm -rf feedgen
 
 script: make test
diff --git a/Makefile b/Makefile
index e9457b4..4ae3541 100644
--- a/Makefile
+++ b/Makefile
@@ -48,7 +48,7 @@ publish_wheel: sdist
 	python setup.py bdist_wheel upload
 
 test:
-	python -I -m unittest feedgen.tests.test_feed
-	python -I -m unittest feedgen.tests.test_entry
-	python -I -m unittest feedgen.tests.test_extension
+	python -m unittest feedgen.tests.test_feed
+	python -m unittest feedgen.tests.test_entry
+	python -m unittest feedgen.tests.test_extension
 	@rm -f tmp_Atomfeed.xml tmp_Rssfeed.xml