diff --git a/ognibuild/debian/fix_build.py b/ognibuild/debian/fix_build.py
index 0ea8a8b..907a69e 100644
--- a/ognibuild/debian/fix_build.py
+++ b/ognibuild/debian/fix_build.py
@@ -507,6 +507,9 @@ class PgBuildExtOutOfDateControlFixer(BuildFixer):
     def can_fix(self, problem):
         return isinstance(problem, NeedPgBuildExtUpdateControl)
 
+    def __repr__(self):
+        return "%s()" % (type(self).__name__, )
+
     def _fix(self, error, context):
         logging.info("Running 'pg_buildext updatecontrol'")
         self.session.check_call(["pg_buildext", "updatecontrol"])
diff --git a/ognibuild/resolver/apt.py b/ognibuild/resolver/apt.py
index 4392bfc..8cd4f25 100644
--- a/ognibuild/resolver/apt.py
+++ b/ognibuild/resolver/apt.py
@@ -598,6 +598,9 @@ class AptResolver(Resolver):
     def __str__(self):
         return "apt"
 
+    def __repr__(self):
+        return "%s()" % (type(self).__name__, )
+
     @classmethod
     def from_session(cls, session):
         return cls(AptManager.from_session(session))