diff --git a/tests/test_acceptance.py b/tests/test_acceptance.py
index a26c236..e67c462 100644
--- a/tests/test_acceptance.py
+++ b/tests/test_acceptance.py
@@ -1986,6 +1986,12 @@ def test_log(self):
 
         pybars.log = original_log
 
+    def test_log_underlying_function(self):
+        # log implementation and test are just stubs
+        template = u"{{log '123'}}"
+        result = ''
+        self.assertRender(template, {}, result)
+
     def test_overriding_property_lookup(self):
         pass
         # Empty upstream