diff --git a/tenant_schemas/postgresql_backend/base.py b/tenant_schemas/postgresql_backend/base.py
index 8602051..a77ff6a 100644
--- a/tenant_schemas/postgresql_backend/base.py
+++ b/tenant_schemas/postgresql_backend/base.py
@@ -193,7 +193,7 @@ class ContentTypeCacheDescriptor(object):
             @lru_cache(maxsize=200)
             def get_cache(schema_name):
                 return {}
-            global_cache[obj.model] = get_cache
+            model_cache[obj.model] = get_cache
         tenant = getattr(connection, 'tenant', None)
         schema_name = getattr(tenant, 'schema_name', 'public')
         return get_cache(schema_name)
@@ -207,6 +207,9 @@ def ContentTypeManager_new__init__(self, *args, **kwargs):
         del self._cache
 ContentTypeManager.__init__ = ContentTypeManager_new__init__
 
+if '_cache' in ContentType.objects.__dict__:
+    del ContentType.objects._cache
+
 if hasattr(ContentType._meta, 'local_managers'):
     for manager in ContentType._meta.local_managers:
         if '_cache' in manager.__dict__: