diff --git a/src/nti/externalization/_base_interfaces.py b/src/nti/externalization/_base_interfaces.py
index d730cef..c528ecb 100644
--- a/src/nti/externalization/_base_interfaces.py
+++ b/src/nti/externalization/_base_interfaces.py
@@ -304,7 +304,7 @@ def __init__(self, use_iso8601_for_unix_timestamp=False):
         #: to "Created Time" and "Last Modified."
         self.use_iso8601_for_unix_timestamp = use_iso8601_for_unix_timestamp
 
-    def __repr__(self):
+    def __repr__(self): # pragma: no cover
         return "ExternalizationPolicy(use_iso8601_for_unix_timestamp=%s)" % (
             self.use_iso8601_for_unix_timestamp
         )