  from MySQLdb.converters import conversions, Thing2Literal
  from MySQLdb.constants import FIELD_TYPE, CLIENT
  
  from django.conf import settings
  from django.db import utils
  from django.db.backends import *
  from django.db.backends.mysql.client import DatabaseClient
 
</s> remove                                          "definitions installed?")
 </s> add                                          "definitions and pytz installed?")
try:
    import pytz
except ImportError:
    pytz = None

  from MySQLdb.converters import conversions, Thing2Literal
  from MySQLdb.constants import FIELD_TYPE, CLIENT
  
try:
    import pytz
except ImportError:
    pytz = None

  from django.conf import settings
  from django.db import utils
  from django.db.backends import *
  from django.db.backends.mysql.client import DatabaseClient
keep keep add keep keep keep keep
 Fixed test failures on MySQL.

Some tests failed when the time zone definitions were loaded in MySQL
and pytz wasn't installed. This setup isn't supported. 
django/db/backends/mysql/base.py