diff --git a/tests/test_cadquery.py b/tests/test_cadquery.py
index 7dcdce52e..79af65a63 100644
--- a/tests/test_cadquery.py
+++ b/tests/test_cadquery.py
@@ -5741,6 +5741,11 @@ def test_toVtk(self):
         assert isinstance(vtk, vtkPolyData)
         assert vtk.GetNumberOfPolys() == 2
 
+    def test_clean(self):
+
+        solid = Workplane().circle(15).extrude(until=40, both=True)
+        assert len(solid.faces().all()) == 3
+
     def test_iterators(self):
 
         w = Workplane().box(1, 1, 1)