diff --git a/tests/conftest.py b/tests/conftest.py
index 794ad221..11063ec1 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -67,6 +67,8 @@ setup(
         local.path('__init__.py').write('')
         local.path('main.py').write("""
 def func():
+    import sys
+    print repr(sys.argv[1:])
     print 'Hello World'
     return 0
 """)
@@ -142,4 +144,4 @@ def config_for_python_pre_commit_git_repo(python_pre_commit_git_repo):
 
     jsonschema.validate([config], CONFIG_JSON_SCHEMA)
 
-    return config
\ No newline at end of file
+    return config
diff --git a/tests/repository_test.py b/tests/repository_test.py
index f8d73cb8..f34b4ca2 100644
--- a/tests/repository_test.py
+++ b/tests/repository_test.py
@@ -46,10 +46,10 @@ def test_install_python_repo_in_env(python_pre_commit_git_repo, config_for_pytho
 def test_run_a_python_hook(config_for_python_pre_commit_git_repo):
     repo = Repository(config_for_python_pre_commit_git_repo)
     repo.install()
-    ret = repo.run_hook('foo', [])
+    ret = repo.run_hook('foo', ['/dev/null'])
 
     assert ret[0] == 0
-    assert ret[1] == 'Hello World\n'
+    assert ret[1] == "['/dev/null']\nHello World\n"
 
 
 @pytest.mark.integration