diff --git a/motors/motor2.py b/motors/motor2.py
index b6f8041..4bf3e97 100644
--- a/motors/motor2.py
+++ b/motors/motor2.py
@@ -20,9 +20,6 @@ def set_winds_params(self):
         super().set_winds_params()
         self.wind_params["Nc"] = "113"
 
-    def set_derived_params(self):
-        pass
-
 
 class Computation2(ComputationBase):
     def set_oper_params(self):
diff --git a/tests/test_design2.py b/tests/test_design2.py
index 56d6cff..4384e38 100644
--- a/tests/test_design2.py
+++ b/tests/test_design2.py
@@ -57,10 +57,9 @@ def test_oper_params_fully_replaced(computation2):
     }
 
 
-def test_derived_params_are_not_set(geometry2):
-    # Geometry2.set_derived_params() is a no-op, unlike Geometry's.
-    assert not hasattr(geometry2, "rotor_r_min")
-    assert not hasattr(geometry2, "rotor_r_max")
+def test_derived_params_are_set(geometry2):
+    assert hasattr(geometry2, "rotor_r_min")
+    assert hasattr(geometry2, "rotor_r_max")
 
 
 def test_solution_expressions_is_a_list_ending_in_torque(computation2):