diff --git a/tests/test_tile.py b/tests/test_tile.py
index 8b5f48b2..1c68de5a 100644
--- a/tests/test_tile.py
+++ b/tests/test_tile.py
@@ -125,3 +125,18 @@ def test_tiles_children_range(self):
         exp.sort()
         for actual_child, exp_child in zip(actual, exp):
             self.assertEqual(exp_child, actual_child)
+
+
+class TestReproject(unittest.TestCase):
+
+    def test_reproject(self):
+        from tilequeue.tile import reproject_lnglat_to_mercator
+        coord = reproject_lnglat_to_mercator(0, 0)
+        self.assertAlmostEqual(0, coord[0])
+        self.assertAlmostEqual(0, coord[1])
+
+    def test_reproject_with_z(self):
+        from tilequeue.tile import reproject_lnglat_to_mercator
+        coord = reproject_lnglat_to_mercator(0, 0, 0)
+        self.assertAlmostEqual(0, coord[0])
+        self.assertAlmostEqual(0, coord[1])
diff --git a/tilequeue/tile.py b/tilequeue/tile.py
index ce741b9d..d46d3775 100644
--- a/tilequeue/tile.py
+++ b/tilequeue/tile.py
@@ -93,7 +93,7 @@ def coord_to_bounds(coord):
     return bounds
 
 
-def reproject_lnglat_to_mercator(x, y):
+def reproject_lnglat_to_mercator(x, y, *unused_coords):
     return pyproj.transform(latlng_proj, merc_proj, x, y)