diff --git a/django/contrib/admin/options.py b/django/contrib/admin/options.py
index 808f4709ac..32b30a7e8b 100644
--- a/django/contrib/admin/options.py
+++ b/django/contrib/admin/options.py
@@ -134,7 +134,7 @@ class BaseModelAdmin(metaclass=forms.MediaDefiningClass):
             return self.formfield_for_choice_field(db_field, request, **kwargs)
 
         # ForeignKey or ManyToManyFields
-        if isinstance(db_field, models.ManyToManyField) or isinstance(db_field, models.ForeignKey):
+        if isinstance(db_field, (models.ForeignKey, models.ManyToManyField)):
             # Combine the field kwargs with any options for formfield_overrides.
             # Make sure the passed in **kwargs override anything in
             # formfield_overrides because **kwargs is more specific, and should
diff --git a/django/contrib/admin/utils.py b/django/contrib/admin/utils.py
index 5f3a83267d..9bd4aa7857 100644
--- a/django/contrib/admin/utils.py
+++ b/django/contrib/admin/utils.py
@@ -394,7 +394,7 @@ def display_for_field(value, field, empty_value_display):
         return dict(field.flatchoices).get(value, empty_value_display)
     # NullBooleanField needs special-case null-handling, so it comes
     # before the general null test.
-    elif isinstance(field, models.BooleanField) or isinstance(field, models.NullBooleanField):
+    elif isinstance(field, (models.BooleanField, models.NullBooleanField)):
         return _boolean_icon(value)
     elif value is None:
         return empty_value_display
diff --git a/django/contrib/postgres/fields/array.py b/django/contrib/postgres/fields/array.py
index d418e1dc1a..7992740663 100644
--- a/django/contrib/postgres/fields/array.py
+++ b/django/contrib/postgres/fields/array.py
@@ -83,7 +83,7 @@ class ArrayField(Field):
         return '%s[%s]' % (self.base_field.db_type(connection), size)
 
     def get_db_prep_value(self, value, connection, prepared=False):
-        if isinstance(value, list) or isinstance(value, tuple):
+        if isinstance(value, (list, tuple)):
             return [self.base_field.get_db_prep_value(i, connection, prepared=False) for i in value]
         return value
 
diff --git a/django/forms/models.py b/django/forms/models.py
index 4435bf9722..ef934201a9 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -837,7 +837,7 @@ class BaseModelFormSet(BaseFormSet):
                         pk_value = None
                 except IndexError:
                     pk_value = None
-            if isinstance(pk, OneToOneField) or isinstance(pk, ForeignKey):
+            if isinstance(pk, (ForeignKey, OneToOneField)):
                 qs = pk.remote_field.model._default_manager.get_queryset()
             else:
                 qs = self.model._default_manager.get_queryset()