diff --git a/dictorm/test/test_dictorm.py b/dictorm/test/test_dictorm.py
index 6253123..06bbf72 100755
--- a/dictorm/test/test_dictorm.py
+++ b/dictorm/test/test_dictorm.py
@@ -53,11 +53,6 @@ def assertRaisesAny(cls, exps, func, a=None, kw=None):
             if isinstance(e, exps): return
         raise Exception('Did not raise one of the exceptions provided!')
 
-    @classmethod
-    def assertType(cls, a, b):
-        if not isinstance(a, b):
-            raise TypeError('{0} is not type {1}'.format(str(a), b0))
-
     def assertEqualNoRefs(self, a, b):
         return self.assertEqual(_no_refs(a), _no_refs(b))
 
@@ -878,11 +873,11 @@ def test_results_cache(self):
 
         subordinates = bob['subordinates']
         for sub in subordinates:
-            self.assertType(sub, dictorm.Dict)
+            assert isinstance(sub, dictorm.Dict)
         # Error would be raised if subordinates isn't cached
         bob._table.get_where = error
         for sub in subordinates:
-            self.assertType(sub, dictorm.Dict)
+            assert isinstance(sub, dictorm.Dict)
 
     def test_reference_order(self):
         """