diff --git a/test/unit/__init__.py b/test/unit/__init__.py
index fc098ca009..019b8ffef2 100644
--- a/test/unit/__init__.py
+++ b/test/unit/__init__.py
@@ -140,6 +140,7 @@ class FakeRing(Ring):
         self._reload()
 
     def get_part(self, *args, **kwargs):
+        # always call the real method, even if the fake ignores the result
         real_part = super(FakeRing, self).get_part(*args, **kwargs)
         if self._part_shift == 32:
             return 1