      def test_pk_related_lookup_does_not_exist(self):
          with pytest.raises(serializers.ValidationError) as excinfo:
              self.field.to_internal_value(4)
          msg = excinfo.value.detail[0]
          assert msg == "Invalid pk '4' - object does not exist."
  
      def test_pk_related_lookup_invalid_type(self):
          with pytest.raises(serializers.ValidationError) as excinfo:
              self.field.to_internal_value(BadType())
          msg = excinfo.value.detail[0]
 
</s> remove msgid "Invalid pk '{pk_value}' - object does not exist."
 </s> add msgid "Invalid pk \"{pk_value}\" - object does not exist." </s> remove msgid "Invalid page ({page_number}): {message}."
 </s> add msgid "Invalid page \"{page_number}\": {message}." </s> remove                 msg = _("Unable to log in with provided credentials.")
 </s> add                 msg = _('Unable to log in with provided credentials.') </s> remove         'required': _("This field is required."),
        'does_not_exist': _("Invalid pk \"{pk_value}\" - object does not exist."),
        'incorrect_type': _("Incorrect type. Expected pk value, received {data_type}."),
 </s> add         'required': _('This field is required.'),
        'does_not_exist': _('Invalid pk "{pk_value}" - object does not exist.'),
        'incorrect_type': _('Incorrect type. Expected pk value, received {data_type}.'), </s> remove                     msg = _("User account is disabled.")
 </s> add                     msg = _('User account is disabled.')
        assert msg == 'Invalid pk "4" - object does not exist.'
      def test_pk_related_lookup_does_not_exist(self):
          with pytest.raises(serializers.ValidationError) as excinfo:
              self.field.to_internal_value(4)
          msg = excinfo.value.detail[0]
        assert msg == 'Invalid pk "4" - object does not exist.'
  
      def test_pk_related_lookup_invalid_type(self):
          with pytest.raises(serializers.ValidationError) as excinfo:
              self.field.to_internal_value(BadType())
          msg = excinfo.value.detail[0]
keep keep keep keep replace keep keep keep keep keep
 prefer single quotes in source and double quotes in user visible strings; add some missing full stops to user visible strings 
tests/test_relations.py