diff --git a/downpour/resolver.py b/downpour/resolver.py
index 94a2080..0b510c8 100644
--- a/downpour/resolver.py
+++ b/downpour/resolver.py
@@ -13,7 +13,6 @@
 # under the License.
 
 import itertools
-import os.path
 
 
 class Resolver:
diff --git a/tox.ini b/tox.ini
index 70c08f7..d26307f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps = -r{toxinidir}/test-requirements.txt
 commands = python setup.py test --slowest --testr-args='{posargs}'
 
 [testenv:pep8]
-commands = flake8 {posargs}
+commands = flake8 downpour {posargs}
 
 [testenv:venv]
 commands = {posargs}