diff --git a/tests/strategies/test_coord.py b/tests/strategies/test_coord.py
index 6d7508d..9c02591 100644
--- a/tests/strategies/test_coord.py
+++ b/tests/strategies/test_coord.py
@@ -60,7 +60,7 @@ def test_fixed_random_mix(self):
         """Tests an invalid level of participation on prob selection raises a 'ValueError'"""
         gen = default_rng()
 
-        children = create_children(numWorkers=1, numAggr=2)
+        children = create_children(num_workers=1, num_aggrs=2)
 
         with pytest.raises(ValueError):
             fixed_random = random_worker_selection(