Fixed #11665 -- Made TestCase check deferrable constraints after each test.

docs/topics/testing/tools.txt

@@ -761,11 +761,18 @@ additions, including:
 * Wraps the tests within two nested ``atomic`` blocks: one for the whole class
   and one for each test.
 
+* Checks deferrable database constraints at the end of each test.
+
 * Creates a TestClient instance.
 
 * Django-specific assertions for testing for things like redirection and form
   errors.
 
+.. versionchanged:: 1.10
+
+    The check for deferrable database constraints at the end of each test was
+    added.
+
 .. classmethod:: TestCase.setUpTestData()
 
     The class-level ``atomic`` block described above allows the creation of