diff --git a/tests/test_preset_models.py b/tests/test_preset_models.py
index 5aeb258..be82248 100644
--- a/tests/test_preset_models.py
+++ b/tests/test_preset_models.py
@@ -81,6 +81,7 @@ def test_WDM(self):
                                     'center_x': [0.5, 1.0],
                                     'center_y': [-1, 0]}
         wdm = WDM(0.5, 1.5,
+                  7.7,
                   add_globular_clusters=True,
                   kwargs_globular_clusters=kwargs_globular_clusters)
         _ = wdm.lensing_quantities()