diff --git a/django/contrib/gis/tests/geoapp/tests.py b/django/contrib/gis/tests/geoapp/tests.py
index f4699aed8f..122b4dcd4e 100644
--- a/django/contrib/gis/tests/geoapp/tests.py
+++ b/django/contrib/gis/tests/geoapp/tests.py
@@ -6,7 +6,7 @@ import unittest
 from django.db import connection
 from django.contrib.gis import gdal
 from django.contrib.gis.geos import HAS_GEOS
-from django.contrib.gis.tests.utils import oracle, postgis, spatialite
+from django.contrib.gis.tests.utils import no_oracle, oracle, postgis, spatialite
 from django.test import TestCase, skipUnlessDBFeature
 from django.utils import six
 
@@ -784,7 +784,11 @@ class GeoQuerySetTest(TestCase):
                         self.assertAlmostEqual(c1[0] + xfac, c2[0], 5)
                         self.assertAlmostEqual(c1[1] + yfac, c2[1], 5)
 
+    # TODO: Oracle can be made to pass if
+    # union1 = union2 = fromstr('POINT (-97.5211570000000023 34.4646419999999978)')
+    # but this seems unexpected and should be investigated to determine the cause.
     @skipUnlessDBFeature("has_unionagg_method")
+    @no_oracle
     def test_unionagg(self):
         "Testing the `unionagg` (aggregate union) GeoQuerySet method."
         tx = Country.objects.get(name='Texas').mpoly