Serialize instance in retrieve

2 jobs from instance-fixes in 1 minute 29 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #1631
flake8

00:19

failed #1632
test

01:10

 
Test test
    raise TypeError("%s() got an unexpected keyword argument '%s'" % (cls.__name__, kwarg))
TypeError: Instance() got an unexpected keyword argument 'access_method'

----------------------------------------------------------------------
Ran 5 tests in 0.434s

FAILED (errors=1)
Destroying test database for alias 'default'...
ERROR: Job failed: exit code 1