diff --git a/tooz/coordination.py b/tooz/coordination.py
index 1b6dedf..1881d9b 100644
--- a/tooz/coordination.py
+++ b/tooz/coordination.py
@@ -127,6 +127,11 @@ class MemberJoinedGroup(Event):
         self.group_id = group_id
         self.member_id = member_id
 
+    def __repr__(self):
+        return "<%s: group %s: +member %s>" % (self.__class__.__name__,
+                                               self.member_id,
+                                               self.group_id)
+
 
 class MemberLeftGroup(Event):
     """A member left a group event."""
@@ -135,6 +140,11 @@ class MemberLeftGroup(Event):
         self.group_id = group_id
         self.member_id = member_id
 
+    def __repr__(self):
+        return "<%s: group %s: -member %s>" % (self.__class__.__name__,
+                                               self.member_id,
+                                               self.group_id)
+
 
 class LeaderElected(Event):
     """A leader as been elected."""