diff --git a/modeltranslation/tests/tests.py b/modeltranslation/tests/tests.py
index 4228d31..0924206 100644
--- a/modeltranslation/tests/tests.py
+++ b/modeltranslation/tests/tests.py
@@ -4,6 +4,7 @@ from unittest import skipUnless
 import datetime
 import fnmatch
 import imp
+import io
 import os
 import shutil
 
@@ -164,6 +165,12 @@ class ModeltranslationTransactionTestBase(TransactionTestCase):
             # 5. makemigrations (``migrate=False`` in case of south)
             if MIGRATIONS:
                 call_command('makemigrations', 'auth', verbosity=2, interactive=False)
+                # At this point there should not be any migrations to generate
+                out = io.StringIO()
+                call_command('makemigrations', 'auth', verbosity=3,
+                             dry_run=True, interactive=False, stdout=out)
+                assert "No changes detected in app 'auth'\n" == out.getvalue(), \
+                    "Unexpected auth migration:\n %s" % out.getvalue()
 
             # 6. Syncdb (``migrate=False`` in case of south)
             call_command('migrate', verbosity=0, interactive=False, run_syncdb=True)
diff --git a/modeltranslation/translator.py b/modeltranslation/translator.py
index 7040094..55e4e94 100644
--- a/modeltranslation/translator.py
+++ b/modeltranslation/translator.py
@@ -200,6 +200,18 @@ def patch_manager_class(manager):
                     self._constructor_args[1],  # kwargs
                 )
 
+            def __hash__(self):
+                return id(self)
+
+            def __eq__(self, other):
+                if isinstance(other, NewMultilingualManager):
+                    return self._old_module == other._old_module and \
+                        self._old_class == other._old_class
+                if hasattr(other, "__module__") and hasattr(other, "__class__"):
+                    return self._old_module == other.__module__ and \
+                        self._old_class == other.__class__.__name__
+                return False
+
         manager.__class__ = NewMultilingualManager