diff --git a/tests/annotations/tests.py b/tests/annotations/tests.py
index 5928266e60..35b1b2bc51 100644
--- a/tests/annotations/tests.py
+++ b/tests/annotations/tests.py
@@ -16,23 +16,16 @@ from .models import (
 )
 
 
-def cxOracle_513_py3_bug(func):
+def cxOracle_py3_bug(func):
     """
-    cx_Oracle versions up to and including 5.1.3 have a bug with respect to
-    string handling under Python3 (essentially, they treat Python3 strings
-    as Python2 strings rather than unicode). This makes some tests here
-    fail under Python 3 -- so we mark them as expected failures.
-
-    See  https://code.djangoproject.com/ticket/23843, in particular comment 6,
-    which points to https://bitbucket.org/anthony_tuininga/cx_oracle/issue/6/
+    There's a bug in Django/cx_Oracle with respect to string handling under
+    Python 3 (essentially, they treat Python 3 strings as Python 2 strings
+    rather than unicode). This makes some tests here fail under Python 3, so
+    we mark them as expected failures until someone fixes them in #23843.
     """
     from unittest import expectedFailure
     from django.db import connection
-
-    if connection.vendor == 'oracle' and six.PY3 and connection.Database.version <= '5.1.3':
-        return expectedFailure(func)
-    else:
-        return func
+    return expectedFailure(func) if connection.vendor == 'oracle' and six.PY3 else func
 
 
 class NonAggregateAnnotationTestCase(TestCase):
@@ -387,7 +380,7 @@ class NonAggregateAnnotationTestCase(TestCase):
                 e.id, e.first_name, e.manager, e.random_value, e.last_name, e.age,
                 e.salary, e.store.name, e.annotated_value))
 
-    @cxOracle_513_py3_bug
+    @cxOracle_py3_bug
     def test_custom_functions(self):
         Company(name='Apple', motto=None, ticker_name='APPL', description='Beautiful Devices').save()
         Company(name='Django Software Foundation', motto=None, ticker_name=None, description=None).save()
@@ -413,7 +406,7 @@ class NonAggregateAnnotationTestCase(TestCase):
             lambda c: (c.name, c.tagline)
         )
 
-    @cxOracle_513_py3_bug
+    @cxOracle_py3_bug
     def test_custom_functions_can_ref_other_functions(self):
         Company(name='Apple', motto=None, ticker_name='APPL', description='Beautiful Devices').save()
         Company(name='Django Software Foundation', motto=None, ticker_name=None, description=None).save()