diff --git a/tests/aggregation_regress/models.py b/tests/aggregation_regress/models.py
index 3498cbf168..f7b42a229e 100644
--- a/tests/aggregation_regress/models.py
+++ b/tests/aggregation_regress/models.py
@@ -10,17 +10,11 @@ class Author(models.Model):
     age = models.IntegerField()
     friends = models.ManyToManyField('self', blank=True)
 
-    def __str__(self):
-        return self.name
-
 
 class Publisher(models.Model):
     name = models.CharField(max_length=255)
     num_awards = models.IntegerField()
 
-    def __str__(self):
-        return self.name
-
 
 class ItemTag(models.Model):
     tag = models.CharField(max_length=100)
@@ -44,9 +38,6 @@ class Book(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class Store(models.Model):
     name = models.CharField(max_length=255)
@@ -54,9 +45,6 @@ class Store(models.Model):
     original_opening = models.DateTimeField()
     friday_night_closing = models.TimeField()
 
-    def __str__(self):
-        return self.name
-
 
 class Entries(models.Model):
     EntryID = models.AutoField(primary_key=True, db_column='Entry ID')
@@ -81,9 +69,6 @@ class WithManualPK(models.Model):
 class HardbackBook(Book):
     weight = models.FloatField()
 
-    def __str__(self):
-        return "%s (hardback): %s" % (self.name, self.weight)
-
 
 # Models for ticket #21150
 class Alfa(models.Model):
diff --git a/tests/annotations/models.py b/tests/annotations/models.py
index c8fbe17792..500240df9b 100644
--- a/tests/annotations/models.py
+++ b/tests/annotations/models.py
@@ -54,11 +54,6 @@ class Company(models.Model):
     ticker_name = models.CharField(max_length=10, null=True, blank=True)
     description = models.CharField(max_length=200, null=True, blank=True)
 
-    def __str__(self):
-        return 'Company(name=%s, motto=%s, ticker_name=%s, description=%s)' % (
-            self.name, self.motto, self.ticker_name, self.description,
-        )
-
 
 class Ticket(models.Model):
     active_at = models.DateTimeField()
diff --git a/tests/contenttypes_tests/models.py b/tests/contenttypes_tests/models.py
index eeab6296ee..2e0640459f 100644
--- a/tests/contenttypes_tests/models.py
+++ b/tests/contenttypes_tests/models.py
@@ -12,16 +12,10 @@ class Site(models.Model):
     domain = models.CharField(max_length=100)
     objects = SiteManager()
 
-    def __str__(self):
-        return self.domain
-
 
 class Author(models.Model):
     name = models.CharField(max_length=100)
 
-    def __str__(self):
-        return self.name
-
     def get_absolute_url(self):
         return '/authors/%s/' % self.id
 
@@ -32,16 +26,10 @@ class Article(models.Model):
     author = models.ForeignKey(Author, models.CASCADE)
     date_created = models.DateTimeField()
 
-    def __str__(self):
-        return self.title
-
 
 class SchemeIncludedURL(models.Model):
     url = models.URLField(max_length=100)
 
-    def __str__(self):
-        return self.url
-
     def get_absolute_url(self):
         return self.url
 
@@ -62,9 +50,6 @@ class FooWithoutUrl(models.Model):
     """
     name = models.CharField(max_length=30, unique=True)
 
-    def __str__(self):
-        return self.name
-
 
 class FooWithUrl(FooWithoutUrl):
     """
@@ -99,9 +84,6 @@ class Answer(models.Model):
     class Meta:
         order_with_respect_to = 'question'
 
-    def __str__(self):
-        return self.text
-
 
 class Post(models.Model):
     """An ordered tag on an item."""
@@ -114,18 +96,12 @@ class Post(models.Model):
     class Meta:
         order_with_respect_to = 'parent'
 
-    def __str__(self):
-        return self.title
-
 
 class ModelWithNullFKToSite(models.Model):
     title = models.CharField(max_length=200)
     site = models.ForeignKey(Site, null=True, on_delete=models.CASCADE)
     post = models.ForeignKey(Post, null=True, on_delete=models.CASCADE)
 
-    def __str__(self):
-        return self.title
-
     def get_absolute_url(self):
         return '/title/%s/' % quote(self.title)
 
diff --git a/tests/custom_managers/models.py b/tests/custom_managers/models.py
index ca2e14b047..14222bfaf3 100644
--- a/tests/custom_managers/models.py
+++ b/tests/custom_managers/models.py
@@ -130,9 +130,6 @@ class FunPerson(models.Model):
 
     objects = FunPeopleManager()
 
-    def __str__(self):
-        return "%s %s" % (self.first_name, self.last_name)
-
 
 class Book(models.Model):
     title = models.CharField(max_length=50)
@@ -157,9 +154,6 @@ class Book(models.Model):
     class Meta:
         base_manager_name = 'annotated_objects'
 
-    def __str__(self):
-        return self.title
-
 
 class FastCarManager(models.Manager):
     def get_queryset(self):
@@ -173,9 +167,6 @@ class Car(models.Model):
     cars = models.Manager()
     fast_cars = FastCarManager()
 
-    def __str__(self):
-        return self.name
-
 
 class FastCarAsBase(Car):
     class Meta:
@@ -197,9 +188,6 @@ class RestrictedManager(models.Manager):
 class RelatedModel(models.Model):
     name = models.CharField(max_length=50)
 
-    def __str__(self):
-        return self.name
-
 
 class RestrictedModel(models.Model):
     name = models.CharField(max_length=50)
@@ -209,9 +197,6 @@ class RestrictedModel(models.Model):
     objects = RestrictedManager()
     plain_manager = models.Manager()
 
-    def __str__(self):
-        return self.name
-
 
 class OneToOneRestrictedModel(models.Model):
     name = models.CharField(max_length=50)
@@ -221,9 +206,6 @@ class OneToOneRestrictedModel(models.Model):
     objects = RestrictedManager()
     plain_manager = models.Manager()
 
-    def __str__(self):
-        return self.name
-
 
 class AbstractPerson(models.Model):
     abstract_persons = models.Manager()
diff --git a/tests/custom_pk/models.py b/tests/custom_pk/models.py
index 0b272c1135..edfc6712f3 100644
--- a/tests/custom_pk/models.py
+++ b/tests/custom_pk/models.py
@@ -29,16 +29,10 @@ class Business(models.Model):
     class Meta:
         verbose_name_plural = 'businesses'
 
-    def __str__(self):
-        return self.name
-
 
 class Bar(models.Model):
     id = MyAutoField(primary_key=True, db_index=True)
 
-    def __str__(self):
-        return repr(self.pk)
-
 
 class Foo(models.Model):
     bar = models.ForeignKey(Bar, models.CASCADE)
diff --git a/tests/db_functions/models.py b/tests/db_functions/models.py
index 0deea8f54c..97584326aa 100644
--- a/tests/db_functions/models.py
+++ b/tests/db_functions/models.py
@@ -10,9 +10,6 @@ class Author(models.Model):
     goes_by = models.CharField(max_length=50, null=True, blank=True)
     age = models.PositiveSmallIntegerField(default=30)
 
-    def __str__(self):
-        return self.name
-
 
 class Article(models.Model):
     authors = models.ManyToManyField(Author, related_name='articles')
@@ -24,9 +21,6 @@ class Article(models.Model):
     updated = models.DateTimeField(null=True, blank=True)
     views = models.PositiveIntegerField(default=0)
 
-    def __str__(self):
-        return self.title
-
 
 class Fan(models.Model):
     name = models.CharField(max_length=50)
@@ -34,9 +28,6 @@ class Fan(models.Model):
     author = models.ForeignKey(Author, models.CASCADE, related_name='fans')
     fan_since = models.DateTimeField(null=True, blank=True)
 
-    def __str__(self):
-        return self.name
-
 
 class DTModel(models.Model):
     name = models.CharField(max_length=32)
@@ -48,9 +39,6 @@ class DTModel(models.Model):
     end_time = models.TimeField(null=True, blank=True)
     duration = models.DurationField(null=True, blank=True)
 
-    def __str__(self):
-        return 'DTModel({})'.format(self.name)
-
 
 class DecimalModel(models.Model):
     n1 = models.DecimalField(decimal_places=2, max_digits=6)
diff --git a/tests/defer_regress/models.py b/tests/defer_regress/models.py
index 8b05fc4130..78d4c3e646 100644
--- a/tests/defer_regress/models.py
+++ b/tests/defer_regress/models.py
@@ -11,9 +11,6 @@ class Item(models.Model):
     value = models.IntegerField()
     other_value = models.IntegerField(default=0)
 
-    def __str__(self):
-        return self.name
-
 
 class RelatedItem(models.Model):
     item = models.ForeignKey(Item, models.CASCADE)
@@ -35,9 +32,6 @@ class Leaf(models.Model):
     second_child = models.ForeignKey(Child, models.SET_NULL, related_name="other", null=True)
     value = models.IntegerField(default=42)
 
-    def __str__(self):
-        return self.name
-
 
 class ResolveThis(models.Model):
     num = models.FloatField()
@@ -53,9 +47,6 @@ class SimpleItem(models.Model):
     name = models.CharField(max_length=15)
     value = models.IntegerField()
 
-    def __str__(self):
-        return self.name
-
 
 class Feature(models.Model):
     item = models.ForeignKey(SimpleItem, models.CASCADE)
diff --git a/tests/delete/models.py b/tests/delete/models.py
index 440581dc54..7f6e6a89ce 100644
--- a/tests/delete/models.py
+++ b/tests/delete/models.py
@@ -13,9 +13,6 @@ class R(models.Model):
     is_default = models.BooleanField(default=False)
     p = models.ForeignKey(P, models.CASCADE, null=True)
 
-    def __str__(self):
-        return "%s" % self.pk
-
 
 def get_default_r():
     return R.objects.get_or_create(is_default=True)[0].pk
diff --git a/tests/expressions/models.py b/tests/expressions/models.py
index a3129207fa..6e1ce37b10 100644
--- a/tests/expressions/models.py
+++ b/tests/expressions/models.py
@@ -100,6 +100,3 @@ class UUIDPK(models.Model):
 class UUID(models.Model):
     uuid = models.UUIDField(null=True)
     uuid_fk = models.ForeignKey(UUIDPK, models.CASCADE, null=True)
-
-    def __str__(self):
-        return "%s" % self.uuid
diff --git a/tests/expressions_case/models.py b/tests/expressions_case/models.py
index d8a055ac38..8e8e33a678 100644
--- a/tests/expressions_case/models.py
+++ b/tests/expressions_case/models.py
@@ -38,25 +38,16 @@ class CaseTestModel(models.Model):
     uuid = models.UUIDField(null=True)
     fk = models.ForeignKey('self', models.CASCADE, null=True)
 
-    def __str__(self):
-        return "%i, %s" % (self.integer, self.string)
-
 
 class O2OCaseTestModel(models.Model):
     o2o = models.OneToOneField(CaseTestModel, models.CASCADE, related_name='o2o_rel')
     integer = models.IntegerField()
 
-    def __str__(self):
-        return "%i, %s" % (self.id, self.o2o)
-
 
 class FKCaseTestModel(models.Model):
     fk = models.ForeignKey(CaseTestModel, models.CASCADE, related_name='fk_rel')
     integer = models.IntegerField()
 
-    def __str__(self):
-        return "%i, %s" % (self.id, self.fk)
-
 
 class Client(models.Model):
     REGULAR = 'R'
@@ -74,6 +65,3 @@ class Client(models.Model):
         choices=ACCOUNT_TYPE_CHOICES,
         default=REGULAR,
     )
-
-    def __str__(self):
-        return self.name
diff --git a/tests/expressions_window/models.py b/tests/expressions_window/models.py
index d479d1aea6..ce6f6621e9 100644
--- a/tests/expressions_window/models.py
+++ b/tests/expressions_window/models.py
@@ -12,6 +12,3 @@ class Employee(models.Model):
     hire_date = models.DateField(blank=False, null=False)
     age = models.IntegerField(blank=False, null=False)
     classification = models.ForeignKey('Classification', on_delete=models.CASCADE, null=True)
-
-    def __str__(self):
-        return '{}, {}, {}, {}'.format(self.name, self.department, self.salary, self.hire_date)
diff --git a/tests/extra_regress/models.py b/tests/extra_regress/models.py
index 3765601f7f..2847f8172b 100644
--- a/tests/extra_regress/models.py
+++ b/tests/extra_regress/models.py
@@ -10,9 +10,6 @@ class RevisionableModel(models.Model):
     title = models.CharField(blank=True, max_length=255)
     when = models.DateTimeField(default=datetime.datetime.now)
 
-    def __str__(self):
-        return "%s (%s, %s)" % (self.title, self.id, self.base.id)
-
     def save(self, *args, force_insert=None, force_update=None, **kwargs):
         super().save(*args, force_insert=force_insert, force_update=force_update, **kwargs)
         if not self.base:
diff --git a/tests/filtered_relation/models.py b/tests/filtered_relation/models.py
index 501e731de7..60b3678d55 100644
--- a/tests/filtered_relation/models.py
+++ b/tests/filtered_relation/models.py
@@ -16,16 +16,10 @@ class Author(models.Model):
     object_id = models.PositiveIntegerField(null=True)
     content_object = GenericForeignKey()
 
-    def __str__(self):
-        return self.name
-
 
 class Editor(models.Model):
     name = models.CharField(max_length=255)
 
-    def __str__(self):
-        return self.name
-
 
 class Book(models.Model):
     AVAILABLE = 'available'
@@ -47,16 +41,10 @@ class Book(models.Model):
     generic_author = GenericRelation(Author)
     state = models.CharField(max_length=9, choices=STATES, default=AVAILABLE)
 
-    def __str__(self):
-        return self.title
-
 
 class Borrower(models.Model):
     name = models.CharField(max_length=50, unique=True)
 
-    def __str__(self):
-        return self.name
-
 
 class Reservation(models.Model):
     NEW = 'new'
@@ -79,9 +67,6 @@ class Reservation(models.Model):
     )
     state = models.CharField(max_length=7, choices=STATES, default=NEW)
 
-    def __str__(self):
-        return '-'.join((self.book.name, self.borrower.name, self.state))
-
 
 class RentalSession(models.Model):
     NEW = 'new'
@@ -103,6 +88,3 @@ class RentalSession(models.Model):
         related_query_name='rental_session',
     )
     state = models.CharField(max_length=7, choices=STATES, default=NEW)
-
-    def __str__(self):
-        return '-'.join((self.book.name, self.borrower.name, self.state))
diff --git a/tests/generic_relations_regress/models.py b/tests/generic_relations_regress/models.py
index 4d5620b877..c598d9bfc8 100644
--- a/tests/generic_relations_regress/models.py
+++ b/tests/generic_relations_regress/models.py
@@ -14,9 +14,6 @@ class Link(models.Model):
     object_id = models.PositiveIntegerField()
     content_object = GenericForeignKey()
 
-    def __str__(self):
-        return "Link to %s id=%s" % (self.content_type, self.object_id)
-
 
 class LinkProxy(Link):
     class Meta:
@@ -28,18 +25,13 @@ class Place(models.Model):
     links = GenericRelation(Link, related_query_name='places')
     link_proxy = GenericRelation(LinkProxy)
 
-    def __str__(self):
-        return "Place: %s" % self.name
-
 
 class Restaurant(Place):
-    def __str__(self):
-        return "Restaurant: %s" % self.name
+    pass
 
 
 class Cafe(Restaurant):
-    def __str__(self):
-        return "Cafe: %s" % self.name
+    pass
 
 
 class Address(models.Model):
@@ -51,18 +43,12 @@ class Address(models.Model):
     object_id = models.PositiveIntegerField()
     content_object = GenericForeignKey()
 
-    def __str__(self):
-        return '%s %s, %s %s' % (self.street, self.city, self.state, self.zipcode)
-
 
 class Person(models.Model):
     account = models.IntegerField(primary_key=True)
     name = models.CharField(max_length=128)
     addresses = GenericRelation(Address)
 
-    def __str__(self):
-        return self.name
-
 
 class CharLink(models.Model):
     content_type = models.ForeignKey(ContentType, models.CASCADE)
@@ -107,9 +93,6 @@ class Company(models.Model):
     name = models.CharField(max_length=100)
     links = GenericRelation(Link)
 
-    def __str__(self):
-        return "Company: %s" % self.name
-
 
 # For testing #13085 fix, we also use Note model defined above
 class Developer(models.Model):
@@ -120,9 +103,6 @@ class Team(models.Model):
     name = models.CharField(max_length=15)
     members = models.ManyToManyField(Developer)
 
-    def __str__(self):
-        return "%s team" % self.name
-
     def __len__(self):
         return self.members.count()
 
diff --git a/tests/get_or_create/models.py b/tests/get_or_create/models.py
index 6510bb9464..f00d9c4d38 100644
--- a/tests/get_or_create/models.py
+++ b/tests/get_or_create/models.py
@@ -7,9 +7,6 @@ class Person(models.Model):
     birthday = models.DateField()
     defaults = models.TextField()
 
-    def __str__(self):
-        return '%s %s' % (self.first_name, self.last_name)
-
 
 class DefaultPerson(models.Model):
     first_name = models.CharField(max_length=100, default="Anonymous")
diff --git a/tests/lookup/models.py b/tests/lookup/models.py
index 9fd3f14ed3..6a0afaacde 100644
--- a/tests/lookup/models.py
+++ b/tests/lookup/models.py
@@ -81,17 +81,11 @@ class Game(models.Model):
     home = models.CharField(max_length=100)
     away = models.CharField(max_length=100)
 
-    def __str__(self):
-        return "%s at %s" % (self.away, self.home)
-
 
 class Player(models.Model):
     name = models.CharField(max_length=100)
     games = models.ManyToManyField(Game, related_name='players')
 
-    def __str__(self):
-        return self.name
-
 
 class Product(models.Model):
     name = models.CharField(max_length=80)
diff --git a/tests/m2m_intermediary/models.py b/tests/m2m_intermediary/models.py
index 3101fd8a2d..1333d14b41 100644
--- a/tests/m2m_intermediary/models.py
+++ b/tests/m2m_intermediary/models.py
@@ -24,14 +24,8 @@ class Article(models.Model):
     headline = models.CharField(max_length=100)
     pub_date = models.DateField()
 
-    def __str__(self):
-        return self.headline
-
 
 class Writer(models.Model):
     reporter = models.ForeignKey(Reporter, models.CASCADE)
     article = models.ForeignKey(Article, models.CASCADE)
     position = models.CharField(max_length=100)
-
-    def __str__(self):
-        return '%s (%s)' % (self.reporter, self.position)
diff --git a/tests/m2m_signals/models.py b/tests/m2m_signals/models.py
index c156128c83..69809fe2d0 100644
--- a/tests/m2m_signals/models.py
+++ b/tests/m2m_signals/models.py
@@ -7,9 +7,6 @@ class Part(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class Car(models.Model):
     name = models.CharField(max_length=20)
@@ -19,9 +16,6 @@ class Car(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class SportsCar(Car):
     price = models.IntegerField()
@@ -34,6 +28,3 @@ class Person(models.Model):
 
     class Meta:
         ordering = ('name',)
-
-    def __str__(self):
-        return self.name
diff --git a/tests/m2m_through/models.py b/tests/m2m_through/models.py
index 53d04a05f3..2cc0bd6848 100644
--- a/tests/m2m_through/models.py
+++ b/tests/m2m_through/models.py
@@ -10,9 +10,6 @@ class Person(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class Group(models.Model):
     name = models.CharField(max_length=128)
@@ -27,9 +24,6 @@ class Group(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class Membership(models.Model):
     person = models.ForeignKey(Person, models.CASCADE)
@@ -74,9 +68,6 @@ class PersonSelfRefM2M(models.Model):
     friends = models.ManyToManyField('self', through="Friendship", symmetrical=False)
     sym_friends = models.ManyToManyField('self', through='SymmetricalFriendship', symmetrical=True)
 
-    def __str__(self):
-        return self.name
-
 
 class Friendship(models.Model):
     first = models.ForeignKey(PersonSelfRefM2M, models.CASCADE, related_name="rel_from_set")
@@ -99,9 +90,6 @@ class Event(models.Model):
         related_name='events_invited',
     )
 
-    def __str__(self):
-        return self.title
-
 
 class Invitation(models.Model):
     event = models.ForeignKey(Event, models.CASCADE, related_name='invitations')
@@ -122,9 +110,6 @@ class Employee(models.Model):
     class Meta:
         ordering = ('pk',)
 
-    def __str__(self):
-        return self.name
-
 
 class Relationship(models.Model):
     # field order is deliberately inverted.
diff --git a/tests/m2m_through_regress/models.py b/tests/m2m_through_regress/models.py
index 5405e5595c..7d64e7cf75 100644
--- a/tests/m2m_through_regress/models.py
+++ b/tests/m2m_through_regress/models.py
@@ -8,9 +8,6 @@ class Membership(models.Model):
     group = models.ForeignKey('Group', models.CASCADE)
     price = models.IntegerField(default=100)
 
-    def __str__(self):
-        return "%s is a member of %s" % (self.person.name, self.group.name)
-
 
 # using custom id column to test ticket #11107
 class UserMembership(models.Model):
@@ -19,9 +16,6 @@ class UserMembership(models.Model):
     group = models.ForeignKey('Group', models.CASCADE)
     price = models.IntegerField(default=100)
 
-    def __str__(self):
-        return "%s is a user and member of %s" % (self.user.username, self.group.name)
-
 
 class Person(models.Model):
     name = models.CharField(max_length=128)
diff --git a/tests/many_to_one/models.py b/tests/many_to_one/models.py
index 6e00fb18fa..e9f8fbff76 100644
--- a/tests/many_to_one/models.py
+++ b/tests/many_to_one/models.py
@@ -37,9 +37,6 @@ class City(models.Model):
     country = models.ForeignKey(Country, models.CASCADE, related_name='cities', null=True)
     name = models.CharField(max_length=50)
 
-    def __str__(self):
-        return self.name
-
 
 class District(models.Model):
     city = models.ForeignKey(City, models.CASCADE, related_name='districts', null=True)
diff --git a/tests/many_to_one_null/models.py b/tests/many_to_one_null/models.py
index 23b4294593..d8561fcee5 100644
--- a/tests/many_to_one_null/models.py
+++ b/tests/many_to_one_null/models.py
@@ -11,9 +11,6 @@ from django.db import models
 class Reporter(models.Model):
     name = models.CharField(max_length=30)
 
-    def __str__(self):
-        return self.name
-
 
 class Article(models.Model):
     headline = models.CharField(max_length=100)
diff --git a/tests/model_inheritance/models.py b/tests/model_inheritance/models.py
index 58c076d536..fa37e121ea 100644
--- a/tests/model_inheritance/models.py
+++ b/tests/model_inheritance/models.py
@@ -61,9 +61,6 @@ class Attachment(models.Model):
     class Meta:
         abstract = True
 
-    def __str__(self):
-        return self.content
-
 
 class Comment(Attachment):
     is_spam = models.BooleanField(default=False)
@@ -80,17 +77,11 @@ class Link(Attachment):
 class Chef(models.Model):
     name = models.CharField(max_length=50)
 
-    def __str__(self):
-        return "%s the chef" % self.name
-
 
 class Place(models.Model):
     name = models.CharField(max_length=50)
     address = models.CharField(max_length=80)
 
-    def __str__(self):
-        return "%s the place" % self.name
-
 
 class Rating(models.Model):
     rating = models.IntegerField(null=True, blank=True)
@@ -108,32 +99,20 @@ class Restaurant(Place, Rating):
     class Meta(Rating.Meta):
         db_table = 'my_restaurant'
 
-    def __str__(self):
-        return "%s the restaurant" % self.name
-
 
 class ItalianRestaurant(Restaurant):
     serves_gnocchi = models.BooleanField(default=False)
 
-    def __str__(self):
-        return "%s the italian restaurant" % self.name
-
 
 class Supplier(Place):
     customers = models.ManyToManyField(Restaurant, related_name='provider')
 
-    def __str__(self):
-        return "%s the supplier" % self.name
-
 
 class ParkingLot(Place):
     # An explicit link to the parent (we can control the attribute name).
     parent = models.OneToOneField(Place, models.CASCADE, primary_key=True, parent_link=True)
     main_site = models.ForeignKey(Place, models.CASCADE, related_name='lot')
 
-    def __str__(self):
-        return "%s the parking lot" % self.name
-
 
 #
 # Abstract base classes with related models where the sub-class has the
diff --git a/tests/model_inheritance_regress/models.py b/tests/model_inheritance_regress/models.py
index 5e4c928dc9..1f5f516aac 100644
--- a/tests/model_inheritance_regress/models.py
+++ b/tests/model_inheritance_regress/models.py
@@ -10,33 +10,21 @@ class Place(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return "%s the place" % self.name
-
 
 class Restaurant(Place):
     serves_hot_dogs = models.BooleanField(default=False)
     serves_pizza = models.BooleanField(default=False)
 
-    def __str__(self):
-        return "%s the restaurant" % self.name
-
 
 class ItalianRestaurant(Restaurant):
     serves_gnocchi = models.BooleanField(default=False)
 
-    def __str__(self):
-        return "%s the italian restaurant" % self.name
-
 
 class ParkingLot(Place):
     # An explicit link to the parent (we can control the attribute name).
     parent = models.OneToOneField(Place, models.CASCADE, primary_key=True, parent_link=True)
     capacity = models.IntegerField()
 
-    def __str__(self):
-        return "%s the parking lot" % self.name
-
 
 class ParkingLot3(Place):
     # The parent_link connector need not be the pk on the model.
@@ -64,9 +52,6 @@ class Supplier(models.Model):
     name = models.CharField(max_length=50)
     restaurant = models.ForeignKey(Restaurant, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Wholesaler(Supplier):
     retailer = models.ForeignKey(Supplier, models.CASCADE, related_name='wholesale_supplier')
@@ -96,9 +81,6 @@ class Article(models.Model):
     class Meta:
         ordering = ('-pub_date', 'headline')
 
-    def __str__(self):
-        return self.headline
-
 
 class ArticleWithAuthor(Article):
     author = models.CharField(max_length=100)
@@ -126,18 +108,11 @@ class QualityControl(Evaluation):
 class BaseM(models.Model):
     base_name = models.CharField(max_length=100)
 
-    def __str__(self):
-        return self.base_name
-
 
 class DerivedM(BaseM):
     customPK = models.IntegerField(primary_key=True)
     derived_name = models.CharField(max_length=100)
 
-    def __str__(self):
-        return "PK = %d, base_name = %s, derived_name = %s" % (
-            self.customPK, self.base_name, self.derived_name)
-
 
 class AuditBase(models.Model):
     planned_date = models.DateField()
@@ -163,9 +138,6 @@ class Person(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class AbstractEvent(models.Model):
     name = models.CharField(max_length=100)
@@ -175,9 +147,6 @@ class AbstractEvent(models.Model):
         abstract = True
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class BirthdayParty(AbstractEvent):
     pass
diff --git a/tests/model_regress/models.py b/tests/model_regress/models.py
index a9786e37ab..b55ed96097 100644
--- a/tests/model_regress/models.py
+++ b/tests/model_regress/models.py
@@ -17,9 +17,6 @@ class Article(models.Model):
         # A utf-8 verbose name (Ångström's Articles) to test they are valid.
         verbose_name = "\xc3\x85ngstr\xc3\xb6m's Articles"
 
-    def __str__(self):
-        return self.headline
-
 
 class Movie(models.Model):
     # Test models with non-default primary keys / AutoFields #5218
@@ -39,9 +36,6 @@ class Department(models.Model):
     id = models.PositiveIntegerField(primary_key=True)
     name = models.CharField(max_length=200)
 
-    def __str__(self):
-        return self.name
-
 
 class Worker(models.Model):
     department = models.ForeignKey(Department, models.CASCADE)
diff --git a/tests/multiple_database/models.py b/tests/multiple_database/models.py
index ace89fac89..e4e764d6a5 100644
--- a/tests/multiple_database/models.py
+++ b/tests/multiple_database/models.py
@@ -72,9 +72,6 @@ class Pet(models.Model):
     class Meta:
         ordering = ('name',)
 
-    def __str__(self):
-        return self.name
-
 
 class UserProfile(models.Model):
     user = models.OneToOneField(User, models.SET_NULL, null=True)
diff --git a/tests/null_fk_ordering/models.py b/tests/null_fk_ordering/models.py
index 82f3fed9f9..f42ff7b8d5 100644
--- a/tests/null_fk_ordering/models.py
+++ b/tests/null_fk_ordering/models.py
@@ -20,9 +20,6 @@ class Article(models.Model):
     class Meta:
         ordering = ['author__name']
 
-    def __str__(self):
-        return 'Article titled: %s' % self.title
-
 
 # These following 4 models represent a far more complex ordering case.
 class SystemInfo(models.Model):
@@ -38,9 +35,6 @@ class Post(models.Model):
     forum = models.ForeignKey(Forum, models.SET_NULL, null=True)
     title = models.CharField(max_length=32)
 
-    def __str__(self):
-        return self.title
-
 
 class Comment(models.Model):
     post = models.ForeignKey(Post, models.SET_NULL, null=True)
@@ -48,6 +42,3 @@ class Comment(models.Model):
 
     class Meta:
         ordering = ['post__forum__system_info__system_name', 'comment_text']
-
-    def __str__(self):
-        return self.comment_text
diff --git a/tests/null_queries/models.py b/tests/null_queries/models.py
index f2d4caa745..298d4d9277 100644
--- a/tests/null_queries/models.py
+++ b/tests/null_queries/models.py
@@ -4,17 +4,11 @@ from django.db import models
 class Poll(models.Model):
     question = models.CharField(max_length=200)
 
-    def __str__(self):
-        return "Q: %s " % self.question
-
 
 class Choice(models.Model):
     poll = models.ForeignKey(Poll, models.CASCADE)
     choice = models.CharField(max_length=200)
 
-    def __str__(self):
-        return "Choice: %s in poll %s" % (self.choice, self.poll)
-
 # A set of models with an inner one pointing to two outer ones.
 
 
diff --git a/tests/one_to_one/models.py b/tests/one_to_one/models.py
index 5e8b918f25..827dd89afa 100644
--- a/tests/one_to_one/models.py
+++ b/tests/one_to_one/models.py
@@ -29,9 +29,6 @@ class Bar(models.Model):
     place = models.OneToOneField(Place, models.CASCADE)
     serves_cocktails = models.BooleanField(default=True)
 
-    def __str__(self):
-        return "%s the bar" % self.place.name
-
 
 class UndergroundBar(models.Model):
     place = models.OneToOneField(Place, models.SET_NULL, null=True)
@@ -50,9 +47,6 @@ class Favorites(models.Model):
     name = models.CharField(max_length=50)
     restaurants = models.ManyToManyField(Restaurant)
 
-    def __str__(self):
-        return "Favorites for %s" % self.name
-
 
 class ManualPrimaryKey(models.Model):
     primary_key = models.CharField(max_length=10, primary_key=True)
diff --git a/tests/ordering/models.py b/tests/ordering/models.py
index f5a237fe45..2efb743e44 100644
--- a/tests/ordering/models.py
+++ b/tests/ordering/models.py
@@ -37,9 +37,6 @@ class Article(models.Model):
             models.OrderBy(models.F('second_author__name')),
         )
 
-    def __str__(self):
-        return self.headline
-
 
 class OrderedByAuthorArticle(Article):
     class Meta:
diff --git a/tests/prefetch_related/models.py b/tests/prefetch_related/models.py
index a3c0237d8e..0ded7e8b4a 100644
--- a/tests/prefetch_related/models.py
+++ b/tests/prefetch_related/models.py
@@ -42,9 +42,6 @@ class AuthorAddress(models.Model):
     class Meta:
         ordering = ['id']
 
-    def __str__(self):
-        return self.address
-
 
 class Book(models.Model):
     title = models.CharField(max_length=255)
@@ -53,9 +50,6 @@ class Book(models.Model):
     class Meta:
         ordering = ['id']
 
-    def __str__(self):
-        return self.title
-
 
 class BookWithYear(Book):
     book = models.OneToOneField(Book, models.CASCADE, parent_link=True)
@@ -168,9 +162,6 @@ class TaggedItem(models.Model):
     class Meta:
         ordering = ['id']
 
-    def __str__(self):
-        return self.tag
-
 
 class Article(models.Model):
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
@@ -254,9 +245,6 @@ class Employee(models.Model):
     class Meta:
         ordering = ['id']
 
-    def __str__(self):
-        return self.name
-
 
 # Ticket #19607
 
@@ -264,17 +252,11 @@ class LessonEntry(models.Model):
     name1 = models.CharField(max_length=200)
     name2 = models.CharField(max_length=200)
 
-    def __str__(self):
-        return "%s %s" % (self.name1, self.name2)
-
 
 class WordEntry(models.Model):
     lesson_entry = models.ForeignKey(LessonEntry, models.CASCADE)
     name = models.CharField(max_length=200)
 
-    def __str__(self):
-        return "%s (%s)" % (self.name, self.id)
-
 
 # Ticket #21410: Regression when related_name="+"
 
@@ -286,9 +268,6 @@ class Author2(models.Model):
     class Meta:
         ordering = ['id']
 
-    def __str__(self):
-        return self.name
-
 
 # Models for many-to-many with UUID pk test:
 
diff --git a/tests/reverse_lookup/models.py b/tests/reverse_lookup/models.py
index e7db427255..97c1cd289a 100644
--- a/tests/reverse_lookup/models.py
+++ b/tests/reverse_lookup/models.py
@@ -10,22 +10,13 @@ from django.db import models
 class User(models.Model):
     name = models.CharField(max_length=200)
 
-    def __str__(self):
-        return self.name
-
 
 class Poll(models.Model):
     question = models.CharField(max_length=200)
     creator = models.ForeignKey(User, models.CASCADE)
 
-    def __str__(self):
-        return self.question
-
 
 class Choice(models.Model):
     name = models.CharField(max_length=100)
     poll = models.ForeignKey(Poll, models.CASCADE, related_name="poll_choice")
     related_poll = models.ForeignKey(Poll, models.CASCADE, related_name="related_choice")
-
-    def __str__(self):
-        return self.name
diff --git a/tests/select_related/models.py b/tests/select_related/models.py
index b3f113efa8..7cb083fc20 100644
--- a/tests/select_related/models.py
+++ b/tests/select_related/models.py
@@ -19,65 +19,41 @@ from django.db import models
 class Domain(models.Model):
     name = models.CharField(max_length=50)
 
-    def __str__(self):
-        return self.name
-
 
 class Kingdom(models.Model):
     name = models.CharField(max_length=50)
     domain = models.ForeignKey(Domain, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Phylum(models.Model):
     name = models.CharField(max_length=50)
     kingdom = models.ForeignKey(Kingdom, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Klass(models.Model):
     name = models.CharField(max_length=50)
     phylum = models.ForeignKey(Phylum, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Order(models.Model):
     name = models.CharField(max_length=50)
     klass = models.ForeignKey(Klass, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Family(models.Model):
     name = models.CharField(max_length=50)
     order = models.ForeignKey(Order, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Genus(models.Model):
     name = models.CharField(max_length=50)
     family = models.ForeignKey(Family, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 
 class Species(models.Model):
     name = models.CharField(max_length=50)
     genus = models.ForeignKey(Genus, models.CASCADE)
 
-    def __str__(self):
-        return self.name
-
 # and we'll invent a new thing so we have a model with two foreign keys
 
 
@@ -86,24 +62,15 @@ class HybridSpecies(models.Model):
     parent_1 = models.ForeignKey(Species, models.CASCADE, related_name='child_1')
     parent_2 = models.ForeignKey(Species, models.CASCADE, related_name='child_2')
 
-    def __str__(self):
-        return self.name
-
 
 class Topping(models.Model):
     name = models.CharField(max_length=30)
 
-    def __str__(self):
-        return self.name
-
 
 class Pizza(models.Model):
     name = models.CharField(max_length=100)
     toppings = models.ManyToManyField(Topping)
 
-    def __str__(self):
-        return self.name
-
 
 class TaggedItem(models.Model):
     tag = models.CharField(max_length=30)
@@ -112,13 +79,7 @@ class TaggedItem(models.Model):
     object_id = models.PositiveIntegerField()
     content_object = GenericForeignKey('content_type', 'object_id')
 
-    def __str__(self):
-        return self.tag
-
 
 class Bookmark(models.Model):
     url = models.URLField()
     tags = GenericRelation(TaggedItem)
-
-    def __str__(self):
-        return self.url
diff --git a/tests/select_related_onetoone/models.py b/tests/select_related_onetoone/models.py
index a1852f421e..aefa3518a9 100644
--- a/tests/select_related_onetoone/models.py
+++ b/tests/select_related_onetoone/models.py
@@ -5,42 +5,27 @@ class User(models.Model):
     username = models.CharField(max_length=100)
     email = models.EmailField()
 
-    def __str__(self):
-        return self.username
-
 
 class UserProfile(models.Model):
     user = models.OneToOneField(User, models.CASCADE)
     city = models.CharField(max_length=100)
     state = models.CharField(max_length=2)
 
-    def __str__(self):
-        return "%s, %s" % (self.city, self.state)
-
 
 class UserStatResult(models.Model):
     results = models.CharField(max_length=50)
 
-    def __str__(self):
-        return 'UserStatResults, results = %s' % self.results
-
 
 class UserStat(models.Model):
     user = models.OneToOneField(User, models.CASCADE, primary_key=True)
     posts = models.IntegerField()
     results = models.ForeignKey(UserStatResult, models.CASCADE)
 
-    def __str__(self):
-        return 'UserStat, posts = %s' % self.posts
-
 
 class StatDetails(models.Model):
     base_stats = models.OneToOneField(UserStat, models.CASCADE)
     comments = models.IntegerField()
 
-    def __str__(self):
-        return 'StatDetails, comments = %s' % self.comments
-
 
 class AdvancedUserStat(UserStat):
     karma = models.IntegerField()
@@ -58,33 +43,21 @@ class Product(models.Model):
 class Parent1(models.Model):
     name1 = models.CharField(max_length=50)
 
-    def __str__(self):
-        return self.name1
-
 
 class Parent2(models.Model):
     # Avoid having two "id" fields in the Child1 subclass
     id2 = models.AutoField(primary_key=True)
     name2 = models.CharField(max_length=50)
 
-    def __str__(self):
-        return self.name2
-
 
 class Child1(Parent1, Parent2):
     value = models.IntegerField()
 
-    def __str__(self):
-        return self.name1
-
 
 class Child2(Parent1):
     parent2 = models.OneToOneField(Parent2, models.CASCADE)
     value = models.IntegerField()
 
-    def __str__(self):
-        return self.name1
-
 
 class Child3(Child2):
     value3 = models.IntegerField()
diff --git a/tests/select_related_regress/models.py b/tests/select_related_regress/models.py
index ed4d98544b..83e9321ef7 100644
--- a/tests/select_related_regress/models.py
+++ b/tests/select_related_regress/models.py
@@ -4,17 +4,11 @@ from django.db import models
 class Building(models.Model):
     name = models.CharField(max_length=10)
 
-    def __str__(self):
-        return "Building: %s" % self.name
-
 
 class Device(models.Model):
     building = models.ForeignKey('Building', models.CASCADE)
     name = models.CharField(max_length=10)
 
-    def __str__(self):
-        return "device '%s' in building %s" % (self.name, self.building)
-
 
 class Port(models.Model):
     device = models.ForeignKey('Device', models.CASCADE)
@@ -38,9 +32,6 @@ class Connection(models.Model):
         unique=True,
     )
 
-    def __str__(self):
-        return "%s to %s" % (self.start, self.end)
-
 # Another non-tree hierarchy that exercises code paths similar to the above
 # example, but in a slightly different configuration.
 
@@ -100,9 +91,6 @@ class SpecialClient(Client):
 class Parent(models.Model):
     name = models.CharField(max_length=10)
 
-    def __str__(self):
-        return self.name
-
 
 class Child(Parent):
     value = models.IntegerField()
@@ -121,9 +109,6 @@ class Item(models.Model):
 class Fowl(models.Model):
     name = models.CharField(max_length=10)
 
-    def __str__(self):
-        return self.name
-
 
 class Hen(Fowl):
     pass