Index: Lib/unittest/case.py
===================================================================
--- Lib/unittest/case.py	(revision 86828)
+++ Lib/unittest/case.py	(working copy)
@@ -1008,25 +1008,28 @@
             expected = collections.Counter(iter(expected_seq))
             actual = collections.Counter(iter(actual_seq))
         except TypeError:
-            # Unsortable items (example: set(), complex(), ...)
+            # Unhashable items (example: list(), dict(), etc)
             expected = list(expected_seq)
             actual = list(actual_seq)
             missing, unexpected = unorderable_list_difference(expected, actual)
-        else:
-            if expected == actual:
-                return
-            missing = list(expected - actual)
-            unexpected = list(actual - expected)
-
-        errors = []
-        if missing:
-            errors.append('Expected, but missing:\n    %s' %
-                           safe_repr(missing))
-        if unexpected:
-            errors.append('Unexpected, but present:\n    %s' %
-                           safe_repr(unexpected))
-        if errors:
-            standardMsg = '\n'.join(errors)
+            errors = []
+            if missing:
+                errors.append('Expected, but missing:\n    %s' %
+                               safe_repr(missing))
+            if unexpected:
+                errors.append('Unexpected, but present:\n    %s' %
+                               safe_repr(unexpected))
+            if errors:
+                standardMsg = '\n'.join(errors)
+                self.fail(self._formatMessage(msg, standardMsg))
+            return
+    
+        if expected != actual:
+            errors = []
+            for k in (expected - actual) + (actual - expected):
+                errors.append('expected %d, got %d: %s' %
+                              (expected[k], actual[k], safe_repr(k)))
+            standardMsg = safe_repr('\n'.join(errors))
             self.fail(self._formatMessage(msg, standardMsg))
 
     # Old name for assertCountEqual()