diff --git a/dynamiq_engine/tests/test_pairwise_interactions.py b/dynamiq_engine/tests/test_pairwise_interactions.py
index f2865e4..18f9542 100644
--- a/dynamiq_engine/tests/test_pairwise_interactions.py
+++ b/dynamiq_engine/tests/test_pairwise_interactions.py
@@ -184,3 +184,11 @@ def test_d2fdx2(self):
         }
         check_function(self.gaussian.d2fdx2, tests)
 
+class testLennardJonesInteraction(object):
+    pass
+
+class testWCAInteraction(object):
+    pass
+
+class testGeneralizedWCAInteraction(object):
+    pass