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[1.4.x] Fixed #20904: Test failure on Oracle

Just skip the failing test, the failure isn't really relevant; also,
both the test and the reason for its failure were removed in 1.5.

Thanks Tim Graham for advice on 1.5.
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1 parent d5da495 commit d9dc98159d0454d74aebec3e9a763ddecea0961e @shaib shaib committed
Showing with 8 additions and 1 deletion.
  1. +8 −1 tests/regressiontests/test_runner/
9 tests/regressiontests/test_runner/
@@ -10,7 +10,7 @@
from django.core.exceptions import ImproperlyConfigured
from import call_command
from django import db
-from django.test import simple
+from django.test import simple, skipIfDBFeature
from django.test.simple import DjangoTestSuiteRunner, get_tests
from django.test.testcases import connections_support_transactions
from django.test.utils import get_warnings_state, restore_warnings_state
@@ -217,6 +217,13 @@ def test_all_options_given(self):
class Ticket16885RegressionTests(unittest.TestCase):
+ # Skipped if empty strings are nulls because this feature causes
+ # database setup to fail on model validation for models defined
+ # with string PKs (such models are already in the AppCache), while
+ # the test cares neither about models nor about the database backend
+ # from settings.
+ @skipIfDBFeature('interprets_empty_strings_as_nulls')
def test_ticket_16885(self):
"""Features are also confirmed on mirrored databases."""
old_db_connections = db.connections

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