diff --git a/python/tests/test_Table.py b/python/tests/test_Table.py
index ac5859ecb..8f617aff5 100644
--- a/python/tests/test_Table.py
+++ b/python/tests/test_Table.py
@@ -22,7 +22,7 @@ class TestTable:
 
     @pytest.mark.parametrize('N',[10,40])
     def test_len(self,N):
-        len(Table(np.random.rand(N,3),{'X':3})) == N
+        assert len(Table(np.random.rand(N,3),{'X':3})) == N
 
     def test_get_scalar(self,default):
         d = default.get('s')