diff --git a/tests/test_grid.py b/tests/test_grid.py
index b7da02121..2bfea35e0 100644
--- a/tests/test_grid.py
+++ b/tests/test_grid.py
@@ -10,6 +10,10 @@ def test_distance():
     assert distance((1, 2), (5, 5)) == 5.0
 
 
+def test_distance2():
+	assert distance2((1, 2), (5, 5)) == 25.0
+
+
 def test_vector_clip():
     assert vector_clip((-1, 10), (0, 0), (9, 9)) == (0, 9)