diff --git a/tests/unit/test_pillar.py b/tests/unit/test_pillar.py
index <HASH>..<HASH> 100644
--- a/tests/unit/test_pillar.py
+++ b/tests/unit/test_pillar.py
@@ -439,8 +439,8 @@ class PillarTestCase(TestCase):
             'renderer_blacklist': [],
             'renderer_whitelist': [],
             'state_top': '',
-            'pillar_roots': [],
-            'file_roots': [],
+            'pillar_roots': {},
+            'file_roots': {},
             'extension_modules': ''
         }
         grains = {
mocked file_roots and pillar_roots should be dicts