diff --git a/tests/test_direct_api/test_face.py b/tests/test_direct_api/test_face.py
index 353c20c..82460c0 100644
--- a/tests/test_direct_api/test_face.py
+++ b/tests/test_direct_api/test_face.py
@@ -494,6 +494,14 @@ class TestFace(unittest.TestCase):
         with self.assertRaises(RuntimeError):
             Face.make_surface_patch(edge_constraints=[])
 
+        with self.assertRaises(RuntimeError):
+            Face.make_surface_patch(
+                edge_constraints=[
+                    Edge.make_line((0, 0), (1, 0)),
+                    Edge.make_line((0, 0), (0, 1)),
+                ]
+            )
+
     # def test_to_arcs(self):
     #     with BuildSketch() as bs:
     #         with BuildLine() as bl: