diff --git a/django_pyscss/utils.py b/django_pyscss/utils.py
index 8ff5ad9..d668280 100644
--- a/django_pyscss/utils.py
+++ b/django_pyscss/utils.py
@@ -13,6 +13,7 @@ def find_all_files(glob):
     """
     for finder in finders.get_finders():
         for path, storage in finder.list([]):
-            if fnmatch.fnmatchcase(os.path.join(storage.prefix or '', path),
+            if fnmatch.fnmatchcase(os.path.join(getattr(storage, 'prefix', '')
+                                                or '', path),
                                    glob):
                 yield path, storage
diff --git a/testproject/runtests.py b/testproject/runtests.py
index 394f24a..09930f0 100644
--- a/testproject/runtests.py
+++ b/testproject/runtests.py
@@ -3,6 +3,10 @@ import os
 import sys
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "testproject.testproject.settings")
 
+import django
+if hasattr(django, 'setup'):
+    django.setup()
+
 from django.test.utils import get_runner
 from django.conf import settings