diff --git a/prjxray/overlay.py b/prjxray/overlay.py
index 95ef8e38..64c7cce6 100644
--- a/prjxray/overlay.py
+++ b/prjxray/overlay.py
@@ -15,8 +15,7 @@ class Overlay(object):
 
     """
 
-    def __init__(self, grid, region_dict):
-        self.grid = grid
+    def __init__(self, region_dict):
         self.region_dict = region_dict
 
     def tile_in_roi(self, grid_loc):
diff --git a/tests/test_util.py b/tests/test_util.py
index dae5b13c..2187630c 100755
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -22,10 +22,10 @@ environ['XRAY_DATABASE_ROOT'] = '.'
 environ['XRAY_PART'] = './'
 
 from prjxray.util import get_roi, get_db_root
-from prjxray.db import Database
 from prjxray.overlay import Overlay
 from prjxray.grid_types import GridLoc
 
+
 @contextmanager
 def setup_database(contents):
     with TemporaryDirectory() as d:
@@ -72,16 +72,16 @@ class TestUtil(TestCase):
                 list(get_roi().gen_sites()), [('ATILE', 'FOO', 'BAR')])
 
     def test_in_roi_overlay(self):
-        db = Database(get_db_root(), './database/artix7/xc7a50tfgg484-1')
         region_dict = {}
         region_dict['pr1'] = (10, 58, 0, 51)
         region_dict['pr2'] = (10, 58, 52, 103)
-        overlay = Overlay(db.grid(), region_dict)
+        overlay = Overlay(region_dict)
         self.assertFalse(overlay.tile_in_roi(GridLoc(18, 50)))
         self.assertFalse(overlay.tile_in_roi(GridLoc(18, 84)))
         self.assertTrue(overlay.tile_in_roi(GridLoc(8, 50)))
         self.assertTrue(overlay.tile_in_roi(GridLoc(18, 112)))
         self.assertTrue(overlay.tile_in_roi(GridLoc(80, 40)))
 
+
 if __name__ == '__main__':
     main()