diff --git a/rest_framework_httpsignature/tests.py b/rest_framework_httpsignature/tests.py
index e2eda6e..b77d73e 100644
--- a/rest_framework_httpsignature/tests.py
+++ b/rest_framework_httpsignature/tests.py
@@ -137,7 +137,7 @@ def test_build_signature(self):
         signature_string = self.auth.build_signature(
             self.KEYID, SECRET, req)
         signature = re.match(
-            '.*signature="(.+)",?.*', signature_string).group(1)
+            r'.*signature="(.+)",.*', signature_string).group(1)
         self.assertEqual(expected_signature, signature)
 
 
diff --git a/test_settings.py b/test_settings.py
index deb178e..be0cdbd 100644
--- a/test_settings.py
+++ b/test_settings.py
@@ -12,6 +12,5 @@
     'rest_framework_httpsignature',
 )
 
-ROOT_URLCONF = 'rest_framework_httpsignature.tests'
 
 SECRET_KEY = 'MY PRIVATE SECRET'