Do your test classes use setUpClass() and/or tearDownClass()? If so, are 
you missing super() calls in those methods?

On Monday, July 13, 2015 at 9:37:03 AM UTC-4, tom.sz...@eporta.com wrote:
>
> Thanks for the link
> This is the commit at which my tests start failing:
> da9fe5c Fixed #20392 -- Added TestCase.setUpTestData()
>
> On Monday, July 13, 2015 at 12:39:57 PM UTC+1, Tim Graham wrote:
>>
>> That's a starting point, but there are still a lot of commits between 1.8 
>> and 1.7.x. Here's what I meant by "bisecting the commit":
>>
>>
>> https://docs.djangoproject.com/en/dev/internals/contributing/triaging-tickets/#bisecting-a-regression
>>
>> On Monday, July 13, 2015 at 5:50:49 AM UTC-4, tom.sz...@eporta.com wrote:
>>>
>>> Thanks for the swift reply. The problem starts with Django 1.8.0. My 
>>> test suite passes on all 1.7.x versions.
>>>
>>> On Friday, July 10, 2015 at 2:32:25 PM UTC+1, Tim Graham wrote:
>>>>
>>>> No ideas, but if you could bisect to find the Django commit where the 
>>>> problem started to appear that will probably help.
>>>>
>>>> On Friday, July 10, 2015 at 7:21:37 AM UTC-4, tom.sz...@eporta.com 
>>>> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I've recently tried upgrading from Django 1.7.6 to 1.8.3 but haven't 
>>>>> been able to get my test suite to pass.
>>>>>
>>>>> My main problem is that all of the tests pass when run individually, 
>>>>> but when run as an entire test suite, many arbitraily fail due to an 
>>>>> *InterfaceError: 
>>>>> connection already closed*:
>>>>>
>>>>>   File 
>>>>> "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py"
>>>>> , line 838, in execute_sql
>>>>>     cursor = self.connection.cursor()
>>>>>   File 
>>>>> "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py"
>>>>> , line 164, in cursor
>>>>>     cursor = self.make_cursor(self._cursor())
>>>>>   File 
>>>>> "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py"
>>>>> , line 137, in _cursor
>>>>>     return self.create_cursor()
>>>>>   File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", 
>>>>> line 97, in __exit__
>>>>>     six.reraise(dj_exc_type, dj_exc_value, traceback)
>>>>>   File 
>>>>> "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py"
>>>>> , line 137, in _cursor
>>>>>     return self.create_cursor()
>>>>>   File 
>>>>> "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql_psycopg2/base.py"
>>>>> , line 212, in create_cursor
>>>>>     cursor = self.connection.cursor()
>>>>> InterfaceError: connection already closed
>>>>>
>>>>>
>>>>>
>>>>> I was previously using psycopg2.6 with Postgres 9.3 and have tried 
>>>>> upgrading to psycopg2.6.1 with Postgres 9.4, but this hasn't helped.
>>>>>
>>>>> Forcing all my TestCase classes to inherit from SimpleTestCase 
>>>>> resolves this issue, but inheriting from SimpleTestCase isn't something 
>>>>> that I wish to do.
>>>>>
>>>>> Any help would be much appreciated.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Tom
>>>>>
>>>>

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