diff --git a/tests/test_grid_generation.py b/tests/test_grid_generation.py
index 3fa2ab25..9a542fa1 100644
--- a/tests/test_grid_generation.py
+++ b/tests/test_grid_generation.py
@@ -23,7 +23,7 @@ def test_angle_between(v1, v2, v3, true_angle):
 @pytest.mark.parametrize(
     ("lat", "lon", "true_area"),
     [
-        (Y, X, 0.5 * np.pi),
+        (lat, lon, 0.5 * np.pi),
     ],
 )
 def test_quad_area(lat, lon, true_area):