diff --git a/tests/test_flatland_core_grid_grid_utils.py b/tests/test_flatland_core_grid_grid_utils.py
index 61693c4f6376efe044ce9da37e5550d51f8fdfd6..35ecd247dc9908c4c70529ad977e22b45f8add1d 100644
--- a/tests/test_flatland_core_grid_grid_utils.py
+++ b/tests/test_flatland_core_grid_grid_utils.py
@@ -71,7 +71,7 @@ def test_vec2d_norm():
     res_1 = Vec2d.get_norm(node_a)
     res_2 = Vec2d.get_norm(node_b)
     assert np.sqrt(1 * 1 + 2 * 2) == res_1
-    assert np.sqrt(1 * 1 + (-2) * -(2)) == res_2
+    assert np.sqrt(1 * 1 + (-2) * (-2)) == res_2
 
 
 def test_vec2d_normalize():