diff --git a/django/contrib/admindocs/urls.py b/django/contrib/admindocs/urls.py
index e0b2259ef9..bfc9648e83 100644
--- a/django/contrib/admindocs/urls.py
+++ b/django/contrib/admindocs/urls.py
@@ -2,31 +2,31 @@ from django.conf.urls import url
 from django.contrib.admindocs import views
 
 urlpatterns = [
-    url('^$',
+    url(r'^$',
         views.BaseAdminDocsView.as_view(template_name='admin_doc/index.html'),
         name='django-admindocs-docroot'),
-    url('^bookmarklets/$',
+    url(r'^bookmarklets/$',
         views.BookmarkletsView.as_view(),
         name='django-admindocs-bookmarklets'),
-    url('^tags/$',
+    url(r'^tags/$',
         views.TemplateTagIndexView.as_view(),
         name='django-admindocs-tags'),
-    url('^filters/$',
+    url(r'^filters/$',
         views.TemplateFilterIndexView.as_view(),
         name='django-admindocs-filters'),
-    url('^views/$',
+    url(r'^views/$',
         views.ViewIndexView.as_view(),
         name='django-admindocs-views-index'),
-    url('^views/(?P<view>[^/]+)/$',
+    url(r'^views/(?P<view>[^/]+)/$',
         views.ViewDetailView.as_view(),
         name='django-admindocs-views-detail'),
-    url('^models/$',
+    url(r'^models/$',
         views.ModelIndexView.as_view(),
         name='django-admindocs-models-index'),
-    url('^models/(?P<app_label>[^\.]+)\.(?P<model_name>[^/]+)/$',
+    url(r'^models/(?P<app_label>[^\.]+)\.(?P<model_name>[^/]+)/$',
         views.ModelDetailView.as_view(),
         name='django-admindocs-models-detail'),
-    url('^templates/(?P<template>.*)/$',
+    url(r'^templates/(?P<template>.*)/$',
         views.TemplateDetailView.as_view(),
         name='django-admindocs-templates'),
 ]
diff --git a/django/contrib/admindocs/views.py b/django/contrib/admindocs/views.py
index 5fa3c46a8e..476d883a8d 100644
--- a/django/contrib/admindocs/views.py
+++ b/django/contrib/admindocs/views.py
@@ -430,7 +430,7 @@ non_named_group_matcher = re.compile(r'\(.*?\)')
 
 
 def simplify_regex(pattern):
-    """
+    r"""
     Clean up urlpattern regexes into something more readable by humans. For
     example, turn "^(?P<sport_slug>\w+)/athletes/(?P<athlete_slug>\w+)/$"
     into "/<sport_slug>/athletes/<athlete_slug>/".
diff --git a/django/contrib/auth/password_validation.py b/django/contrib/auth/password_validation.py
index 5fdae05a84..bee6bff942 100644
--- a/django/contrib/auth/password_validation.py
+++ b/django/contrib/auth/password_validation.py
@@ -143,7 +143,7 @@ class UserAttributeSimilarityValidator(object):
             value = getattr(user, attribute_name, None)
             if not value or not isinstance(value, string_types):
                 continue
-            value_parts = re.split('\W+', value) + [value]
+            value_parts = re.split(r'\W+', value) + [value]
             for value_part in value_parts:
                 if SequenceMatcher(a=password.lower(), b=value_part.lower()).quick_ratio() > self.max_similarity:
                     try:
diff --git a/django/contrib/humanize/templatetags/humanize.py b/django/contrib/humanize/templatetags/humanize.py
index bb9bc7b1ca..6c43ace840 100644
--- a/django/contrib/humanize/templatetags/humanize.py
+++ b/django/contrib/humanize/templatetags/humanize.py
@@ -49,7 +49,7 @@ def intcomma(value, use_l10n=True):
         else:
             return number_format(value, force_grouping=True)
     orig = force_text(value)
-    new = re.sub("^(-?\d+)(\d{3})", '\g<1>,\g<2>', orig)
+    new = re.sub(r"^(-?\d+)(\d{3})", r'\g<1>,\g<2>', orig)
     if orig == new:
         return new
     else:
diff --git a/django/core/checks/urls.py b/django/core/checks/urls.py
index 8356fc2f00..e744cc0ca4 100644
--- a/django/core/checks/urls.py
+++ b/django/core/checks/urls.py
@@ -78,7 +78,7 @@ def check_include_trailing_dollar(pattern):
     Check that include is not used with a regex ending with a dollar.
     """
     regex_pattern = pattern.regex.pattern
-    if regex_pattern.endswith('$') and not regex_pattern.endswith('\$'):
+    if regex_pattern.endswith('$') and not regex_pattern.endswith(r'\$'):
         warning = Warning(
             "Your URL pattern {} uses include with a regex ending with a '$'. "
             "Remove the dollar from the regex to avoid problems including "
diff --git a/django/core/validators.py b/django/core/validators.py
index 805dd8860f..5a7fd1a49b 100644
--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -88,12 +88,12 @@ class URLValidator(RegexValidator):
     # Max length for domain name labels is 63 characters per RFC 1034 sec. 3.1
     domain_re = r'(?:\.(?!-)[a-z' + ul + r'0-9-]{1,63}(?<!-))*'
     tld_re = (
-        '\.'                                # dot
-        '(?!-)'                             # can't start with a dash
-        '(?:[a-z' + ul + '-]{2,63}'         # domain label
-        '|xn--[a-z0-9]{1,59})'              # or punycode label
-        '(?<!-)'                            # can't end with a dash
-        '\.?'                               # may have a trailing dot
+        r'\.'                                # dot
+        r'(?!-)'                             # can't start with a dash
+        r'(?:[a-z' + ul + '-]{2,63}'         # domain label
+        r'|xn--[a-z0-9]{1,59})'              # or punycode label
+        r'(?<!-)'                            # can't end with a dash
+        r'\.?'                               # may have a trailing dot
     )
     host_re = '(' + hostname_re + domain_re + tld_re + '|localhost)'
 
@@ -156,7 +156,7 @@ class URLValidator(RegexValidator):
             raise ValidationError(self.message, code=self.code)
 
 integer_validator = RegexValidator(
-    _lazy_re_compile('^-?\d+\Z'),
+    _lazy_re_compile(r'^-?\d+\Z'),
     message=_('Enter a valid integer.'),
     code='invalid',
 )
@@ -295,7 +295,7 @@ def ip_address_validators(protocol, unpack_ipv4):
 
 
 def int_list_validator(sep=',', message=None, code='invalid', allow_negative=False):
-    regexp = _lazy_re_compile('^%(neg)s\d+(?:%(sep)s%(neg)s\d+)*\Z' % {
+    regexp = _lazy_re_compile(r'^%(neg)s\d+(?:%(sep)s%(neg)s\d+)*\Z' % {
         'neg': '(-)?' if allow_negative else '',
         'sep': re.escape(sep),
     })
diff --git a/django/db/backends/base/operations.py b/django/db/backends/base/operations.py
index 1ed11b178e..a072687ebb 100644
--- a/django/db/backends/base/operations.py
+++ b/django/db/backends/base/operations.py
@@ -428,7 +428,7 @@ class BaseDatabaseOperations(object):
 
     def prep_for_like_query(self, x):
         """Prepares a value for use in a LIKE query."""
-        return force_text(x).replace("\\", "\\\\").replace("%", "\%").replace("_", "\_")
+        return force_text(x).replace("\\", "\\\\").replace("%", r"\%").replace("_", r"\_")
 
     # Same as prep_for_like_query(), but called for "iexact" matches, which
     # need not necessarily be implemented using "LIKE" in the backend.
diff --git a/django/db/backends/sqlite3/introspection.py b/django/db/backends/sqlite3/introspection.py
index 2ed629f94a..ce5e7032fb 100644
--- a/django/db/backends/sqlite3/introspection.py
+++ b/django/db/backends/sqlite3/introspection.py
@@ -125,14 +125,14 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
             if field_desc.startswith("UNIQUE"):
                 continue
 
-            m = re.search('references (\S*) ?\(["|]?(.*)["|]?\)', field_desc, re.I)
+            m = re.search(r'references (\S*) ?\(["|]?(.*)["|]?\)', field_desc, re.I)
             if not m:
                 continue
             table, column = [s.strip('"') for s in m.groups()]
 
             if field_desc.startswith("FOREIGN KEY"):
                 # Find name of the target FK field
-                m = re.match('FOREIGN KEY\(([^\)]*)\).*', field_desc, re.I)
+                m = re.match(r'FOREIGN KEY\(([^\)]*)\).*', field_desc, re.I)
                 field_name = m.groups()[0].strip('"')
             else:
                 field_name = field_desc.split()[0].strip('"')
@@ -175,7 +175,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
             if field_desc.startswith("UNIQUE"):
                 continue
 
-            m = re.search('"(.*)".*references (.*) \(["|](.*)["|]\)', field_desc, re.I)
+            m = re.search(r'"(.*)".*references (.*) \(["|](.*)["|]\)', field_desc, re.I)
             if not m:
                 continue
 
diff --git a/django/db/migrations/writer.py b/django/db/migrations/writer.py
index 7c39cdc931..e75f5bfdd1 100644
--- a/django/db/migrations/writer.py
+++ b/django/db/migrations/writer.py
@@ -181,7 +181,7 @@ class MigrationWriter(object):
         # for comments
         migration_imports = set()
         for line in list(imports):
-            if re.match("^import (.*)\.\d+[^\s]*$", line):
+            if re.match(r"^import (.*)\.\d+[^\s]*$", line):
                 migration_imports.add(line.split("import")[1].strip())
                 imports.remove(line)
                 self.needs_manual_porting = True
diff --git a/django/template/base.py b/django/template/base.py
index 778d82be55..13037c31aa 100644
--- a/django/template/base.py
+++ b/django/template/base.py
@@ -639,7 +639,7 @@ filter_raw_string = r"""
  )""" % {
     'constant': constant_string,
     'num': r'[-+\.]?\d[\d\.e]*',
-    'var_chars': "\w\.",
+    'var_chars': r'\w\.',
     'filter_sep': re.escape(FILTER_SEPARATOR),
     'arg_sep': re.escape(FILTER_ARGUMENT_SEPARATOR),
 }
diff --git a/django/template/defaultfilters.py b/django/template/defaultfilters.py
index e3dc48e474..b258cf269b 100644
--- a/django/template/defaultfilters.py
+++ b/django/template/defaultfilters.py
@@ -259,7 +259,7 @@ def stringformat(value, arg):
 def title(value):
     """Converts a string into titlecase."""
     t = re.sub("([a-z])'([A-Z])", lambda m: m.group(0).lower(), value.title())
-    return re.sub("\d([A-Z])", lambda m: m.group(0).lower(), t)
+    return re.sub(r"\d([A-Z])", lambda m: m.group(0).lower(), t)
 
 
 @register.filter(is_safe=True)
diff --git a/django/template/defaulttags.py b/django/template/defaulttags.py
index ece6f7501d..71fcbbaab3 100644
--- a/django/template/defaulttags.py
+++ b/django/template/defaulttags.py
@@ -1329,7 +1329,7 @@ def templatetag(parser, token):
 
 @register.tag
 def url(parser, token):
-    """
+    r"""
     Return an absolute URL matching the given view with its parameters.
 
     This is a way to define links that aren't tied to a particular URL
diff --git a/django/test/client.py b/django/test/client.py
index af55f9efb4..aea051ed2b 100644
--- a/django/test/client.py
+++ b/django/test/client.py
@@ -33,7 +33,7 @@ __all__ = ('Client', 'RedirectCycleError', 'RequestFactory', 'encode_file', 'enc
 
 BOUNDARY = 'BoUnDaRyStRiNg'
 MULTIPART_CONTENT = 'multipart/form-data; boundary=%s' % BOUNDARY
-CONTENT_TYPE_RE = re.compile('.*; charset=([\w\d-]+);?')
+CONTENT_TYPE_RE = re.compile(r'.*; charset=([\w\d-]+);?')
 
 
 class RedirectCycleError(Exception):
diff --git a/django/test/html.py b/django/test/html.py
index 195c61ede0..dfff8d6369 100644
--- a/django/test/html.py
+++ b/django/test/html.py
@@ -10,7 +10,7 @@ from django.utils import six
 from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.html_parser import HTMLParseError, HTMLParser
 
-WHITESPACE = re.compile('\s+')
+WHITESPACE = re.compile(r'\s+')
 
 
 def normalize_whitespace(string):
diff --git a/django/utils/html.py b/django/utils/html.py
index a5cb56ec9e..84379caa9c 100644
--- a/django/utils/html.py
+++ b/django/utils/html.py
@@ -36,7 +36,7 @@ simple_email_re = re.compile(r'^\S+@\S+\.\S+$')
 link_target_attribute_re = re.compile(r'(<a [^>]*?)target=[^\s>]+')
 html_gunk_re = re.compile(
     r'(?:<br clear="all">|<i><\/i>|<b><\/b>|<em><\/em>|<strong><\/strong>|'
-    '<\/?smallcaps>|<\/?uppercase>)', re.IGNORECASE)
+    r'<\/?smallcaps>|<\/?uppercase>)', re.IGNORECASE)
 hard_coded_bullets_re = re.compile(
     r'((?:<p>(?:%s).*?[a-zA-Z].*?</p>\s*)+)' % '|'.join(re.escape(x) for x in DOTS), re.DOTALL
 )
diff --git a/django/utils/regex_helper.py b/django/utils/regex_helper.py
index 4a697b2920..622d822759 100644
--- a/django/utils/regex_helper.py
+++ b/django/utils/regex_helper.py
@@ -48,7 +48,7 @@ class NonCapture(list):
 
 
 def normalize(pattern):
-    """
+    r"""
     Given a reg-exp pattern, normalizes it to an iterable of forms that
     suffice for reverse matching. This does the following:
 
@@ -203,7 +203,7 @@ def normalize(pattern):
 
 
 def next_char(input_iter):
-    """
+    r"""
     An iterator that yields the next character from "pattern_iter", respecting
     escape sequences. An escaped character is replaced by a representative of
     its class (e.g. \w -> "x"). If the escaped character is one that is
diff --git a/django/utils/text.py b/django/utils/text.py
index 3b8fc581bf..a77f27eed7 100644
--- a/django/utils/text.py
+++ b/django/utils/text.py
@@ -423,11 +423,11 @@ def slugify(value, allow_unicode=False):
     value = force_text(value)
     if allow_unicode:
         value = unicodedata.normalize('NFKC', value)
-        value = re.sub('[^\w\s-]', '', value, flags=re.U).strip().lower()
-        return mark_safe(re.sub('[-\s]+', '-', value, flags=re.U))
+        value = re.sub(r'[^\w\s-]', '', value, flags=re.U).strip().lower()
+        return mark_safe(re.sub(r'[-\s]+', '-', value, flags=re.U))
     value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii')
-    value = re.sub('[^\w\s-]', '', value).strip().lower()
-    return mark_safe(re.sub('[-\s]+', '-', value))
+    value = re.sub(r'[^\w\s-]', '', value).strip().lower()
+    return mark_safe(re.sub(r'[-\s]+', '-', value))
 
 
 def camel_case_to_spaces(value):
diff --git a/django/utils/translation/__init__.py b/django/utils/translation/__init__.py
index 9154ceeb7b..a5975b005c 100644
--- a/django/utils/translation/__init__.py
+++ b/django/utils/translation/__init__.py
@@ -255,7 +255,7 @@ def get_language_info(lang_code):
         info['name_translated'] = ugettext_lazy(info['name'])
     return info
 
-trim_whitespace_re = re.compile('\s*\n\s*')
+trim_whitespace_re = re.compile(r'\s*\n\s*')
 
 
 def trim_whitespace(s):
diff --git a/django/views/debug.py b/django/views/debug.py
index a92f487bb1..f7c685893c 100644
--- a/django/views/debug.py
+++ b/django/views/debug.py
@@ -537,7 +537,7 @@ TECHNICAL_500_TEMPLATE = ("""
   <meta http-equiv="content-type" content="text/html; charset=utf-8">
   <meta name="robots" content="NONE,NOARCHIVE">
   <title>{% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}"""
-"""{% if request %} at {{ request.path_info|escape }}{% endif %}</title>
+r"""{% if request %} at {{ request.path_info|escape }}{% endif %}</title>
   <style type="text/css">
     html * { padding:0; margin:0; }
     body * { padding:10px 20px; }
diff --git a/tests/admin_docs/tests.py b/tests/admin_docs/tests.py
index f57a9c8117..6f6f8838f3 100644
--- a/tests/admin_docs/tests.py
+++ b/tests/admin_docs/tests.py
@@ -153,8 +153,8 @@ class AdminDocViewTests(TestDataMixin, AdminDocsTestCase):
     def test_simplify_regex(self):
         tests = (
             ('^a', '/a'),
-            ('^(?P<a>\w+)/b/(?P<c>\w+)/$', '/<a>/b/<c>/'),
-            ('^(?P<a>\w+)/b/(?P<c>\w+)$', '/<a>/b/<c>'),
+            (r'^(?P<a>\w+)/b/(?P<c>\w+)/$', '/<a>/b/<c>/'),
+            (r'^(?P<a>\w+)/b/(?P<c>\w+)$', '/<a>/b/<c>'),
         )
         for pattern, output in tests:
             self.assertEqual(simplify_regex(pattern), output)
diff --git a/tests/admin_scripts/tests.py b/tests/admin_scripts/tests.py
index 567a8f14f8..84b44931b3 100644
--- a/tests/admin_scripts/tests.py
+++ b/tests/admin_scripts/tests.py
@@ -717,7 +717,7 @@ class ManageNoSettings(AdminScriptTestCase):
         args = ['check', 'admin_scripts']
         out, err = self.run_manage(args)
         self.assertNoOutput(out)
-        self.assertOutput(err, "No module named '?(test_project\.)?settings'?", regex=True)
+        self.assertOutput(err, r"No module named '?(test_project\.)?settings'?", regex=True)
 
     def test_builtin_with_bad_settings(self):
         "no settings: manage.py builtin commands fail if settings file (from argument) doesn't exist"
@@ -950,7 +950,7 @@ class ManageAlternateSettings(AdminScriptTestCase):
         args = ['check', 'admin_scripts']
         out, err = self.run_manage(args)
         self.assertNoOutput(out)
-        self.assertOutput(err, "No module named '?(test_project\.)?settings'?", regex=True)
+        self.assertOutput(err, r"No module named '?(test_project\.)?settings'?", regex=True)
 
     def test_builtin_with_settings(self):
         "alternate: manage.py builtin commands work with settings provided as argument"
@@ -985,7 +985,7 @@ class ManageAlternateSettings(AdminScriptTestCase):
         args = ['noargs_command']
         out, err = self.run_manage(args)
         self.assertNoOutput(out)
-        self.assertOutput(err, "No module named '?(test_project\.)?settings'?", regex=True)
+        self.assertOutput(err, r"No module named '?(test_project\.)?settings'?", regex=True)
 
     def test_custom_command_with_settings(self):
         "alternate: manage.py can execute user commands if settings are provided as argument"
diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index fd8056513b..ef0e44029f 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -2289,7 +2289,7 @@ class AdminViewStringPrimaryKeyTest(TestCase):
         cls.p1 = PrePopulatedPost.objects.create(title='A Long Title', published=True, slug='a-long-title')
         cls.pk = (
             "abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890 "
-            """-_.!~*'() ;/?:@&=+$, <>#%" {}|\^[]`"""
+            r"""-_.!~*'() ;/?:@&=+$, <>#%" {}|\^[]`"""
         )
         cls.m1 = ModelWithStringPrimaryKey.objects.create(string_pk=cls.pk)
         content_type_pk = ContentType.objects.get_for_model(ModelWithStringPrimaryKey).pk
@@ -4323,7 +4323,7 @@ class SeleniumTests(AdminSeleniumTestCase):
         self.selenium.find_element_by_id('id_relatedprepopulated_set-2-1-pubdate').send_keys('1981-08-22')
         self.get_select_option('#id_relatedprepopulated_set-2-1-status', 'option one').click()
         self.selenium.find_element_by_id('id_relatedprepopulated_set-2-1-name').send_keys(
-            'a tÃbűlaŘ inline with ignored ;"&*^\%$#@-/`~ characters'
+            r'a tÃbűlaŘ inline with ignored ;"&*^\%$#@-/`~ characters'
         )
         slug1 = self.selenium.find_element_by_id('id_relatedprepopulated_set-2-1-slug1').get_attribute('value')
         slug2 = self.selenium.find_element_by_id('id_relatedprepopulated_set-2-1-slug2').get_attribute('value')
@@ -4365,7 +4365,7 @@ class SeleniumTests(AdminSeleniumTestCase):
             slug2='option-two-and-now-tabular-inline',
         )
         RelatedPrepopulated.objects.get(
-            name='a tÃbűlaŘ inline with ignored ;"&*^\%$#@-/`~ characters',
+            name=r'a tÃbűlaŘ inline with ignored ;"&*^\%$#@-/`~ characters',
             pubdate='1981-08-22',
             status='option one',
             slug1='tabular-inline-ignored-characters-1981-08-22',
diff --git a/tests/admin_widgets/tests.py b/tests/admin_widgets/tests.py
index baf4b8adc6..057771bfa4 100644
--- a/tests/admin_widgets/tests.py
+++ b/tests/admin_widgets/tests.py
@@ -419,7 +419,7 @@ class AdminFileWidgetTests(TestDataMixin, TestCase):
         self.assertHTMLEqual(
             w.render('test', self.album.cover_art),
             '<p class="file-upload">Currently: <a href="%(STORAGE_URL)salbums/'
-            'hybrid_theory.jpg">albums\hybrid_theory.jpg</a> '
+            r'hybrid_theory.jpg">albums\hybrid_theory.jpg</a> '
             '<span class="clearable-file-input">'
             '<input type="checkbox" name="test-clear" id="test-clear_id" /> '
             '<label for="test-clear_id">Clear</label></span><br />'
@@ -441,7 +441,7 @@ class AdminFileWidgetTests(TestDataMixin, TestCase):
         self.assertContains(
             response,
             '<p><a href="%(STORAGE_URL)salbums/hybrid_theory.jpg">'
-            'albums\hybrid_theory.jpg</a></p>' % {'STORAGE_URL': default_storage.url('')},
+            r'albums\hybrid_theory.jpg</a></p>' % {'STORAGE_URL': default_storage.url('')},
             html=True,
         )
         self.assertNotContains(
diff --git a/tests/auth_tests/test_models.py b/tests/auth_tests/test_models.py
index 5f66a48141..a92f882de0 100644
--- a/tests/auth_tests/test_models.py
+++ b/tests/auth_tests/test_models.py
@@ -117,8 +117,8 @@ class UserManagerTestCase(TestCase):
         self.assertEqual(returned, 'normal@domain.com')
 
     def test_create_user_email_domain_normalize_with_whitespace(self):
-        returned = UserManager.normalize_email('email\ with_whitespace@D.COM')
-        self.assertEqual(returned, 'email\ with_whitespace@d.com')
+        returned = UserManager.normalize_email(r'email\ with_whitespace@D.COM')
+        self.assertEqual(returned, r'email\ with_whitespace@d.com')
 
     def test_empty_username(self):
         with self.assertRaisesMessage(ValueError, 'The given username must be set'):
diff --git a/tests/expressions/tests.py b/tests/expressions/tests.py
index 033a5e8912..e46fdab8e3 100644
--- a/tests/expressions/tests.py
+++ b/tests/expressions/tests.py
@@ -552,7 +552,7 @@ class ExpressionsTests(TestCase):
         self.assertEqual(c_qs.get(), c)
 
     def test_patterns_escape(self):
-        """
+        r"""
         Test that special characters (e.g. %, _ and \) stored in database are
         properly escaped when using a pattern lookup with an expression
         refs #16731
@@ -584,7 +584,7 @@ class ExpressionsTests(TestCase):
             ordered=False)
 
     def test_insensitive_patterns_escape(self):
-        """
+        r"""
         Test that special characters (e.g. %, _ and \) stored in database are
         properly escaped when using a case insensitive pattern lookup with an
         expression -- refs #16731
diff --git a/tests/field_deconstruction/tests.py b/tests/field_deconstruction/tests.py
index 6f4b9fd2cd..1a6385dbf9 100644
--- a/tests/field_deconstruction/tests.py
+++ b/tests/field_deconstruction/tests.py
@@ -158,11 +158,11 @@ class FieldDeconstructionTests(SimpleTestCase):
         self.assertEqual(kwargs, {"upload_to": "foo/bar", "max_length": 200})
 
     def test_file_path_field(self):
-        field = models.FilePathField(match=".*\.txt$")
+        field = models.FilePathField(match=r".*\.txt$")
         name, path, args, kwargs = field.deconstruct()
         self.assertEqual(path, "django.db.models.FilePathField")
         self.assertEqual(args, [])
-        self.assertEqual(kwargs, {"match": ".*\.txt$"})
+        self.assertEqual(kwargs, {"match": r".*\.txt$"})
         field = models.FilePathField(recursive=True, allow_folders=True, max_length=123)
         name, path, args, kwargs = field.deconstruct()
         self.assertEqual(path, "django.db.models.FilePathField")
diff --git a/tests/forms_tests/field_tests/test_filepathfield.py b/tests/forms_tests/field_tests/test_filepathfield.py
index e747189c3e..5c4bd1bbb2 100644
--- a/tests/forms_tests/field_tests/test_filepathfield.py
+++ b/tests/forms_tests/field_tests/test_filepathfield.py
@@ -53,7 +53,7 @@ class FilePathFieldTest(SimpleTestCase):
     def test_filepathfield_3(self):
         path = upath(forms.__file__)
         path = os.path.dirname(os.path.abspath(path)) + '/'
-        f = FilePathField(path=path, match='^.*?\.py$')
+        f = FilePathField(path=path, match=r'^.*?\.py$')
         f.choices.sort()
         expected = [
             ('/django/forms/__init__.py', '__init__.py'),
@@ -72,7 +72,7 @@ class FilePathFieldTest(SimpleTestCase):
     def test_filepathfield_4(self):
         path = os.path.abspath(upath(forms.__file__))
         path = os.path.dirname(path) + '/'
-        f = FilePathField(path=path, recursive=True, match='^.*?\.py$')
+        f = FilePathField(path=path, recursive=True, match=r'^.*?\.py$')
         f.choices.sort()
         expected = [
             ('/django/forms/__init__.py', '__init__.py'),
diff --git a/tests/forms_tests/field_tests/test_regexfield.py b/tests/forms_tests/field_tests/test_regexfield.py
index ece958e509..c0e75438f6 100644
--- a/tests/forms_tests/field_tests/test_regexfield.py
+++ b/tests/forms_tests/field_tests/test_regexfield.py
@@ -48,8 +48,8 @@ class RegexFieldTest(SimpleTestCase):
             f.clean('123')
         six.assertRaisesRegex(
             self, ValidationError,
-            "'Ensure this value has at least 5 characters \(it has 3\)\.',"
-            " u?'Enter a valid value\.'",
+            r"'Ensure this value has at least 5 characters \(it has 3\)\.',"
+            r" u?'Enter a valid value\.'",
             f.clean, 'abc'
         )
         self.assertEqual('12345', f.clean('12345'))
@@ -60,7 +60,7 @@ class RegexFieldTest(SimpleTestCase):
             f.clean('12345a')
 
     def test_regexfield_unicode_characters(self):
-        f = RegexField('^\w+$')
+        f = RegexField(r'^\w+$')
         self.assertEqual('éèøçÎÎ你好', f.clean('éèøçÎÎ你好'))
 
     def test_change_regex_after_init(self):
diff --git a/tests/forms_tests/field_tests/test_splitdatetimefield.py b/tests/forms_tests/field_tests/test_splitdatetimefield.py
index 1febb57b28..e46eb163a8 100644
--- a/tests/forms_tests/field_tests/test_splitdatetimefield.py
+++ b/tests/forms_tests/field_tests/test_splitdatetimefield.py
@@ -23,7 +23,7 @@ class SplitDateTimeFieldTest(SimpleTestCase):
             f.clean('')
         with self.assertRaisesMessage(ValidationError, "'Enter a list of values.'"):
             f.clean('hello')
-        with six.assertRaisesRegex(self, ValidationError, "'Enter a valid date\.', u?'Enter a valid time\.'"):
+        with six.assertRaisesRegex(self, ValidationError, r"'Enter a valid date\.', u?'Enter a valid time\.'"):
             f.clean(['hello', 'there'])
         with self.assertRaisesMessage(ValidationError, "'Enter a valid time.'"):
             f.clean(['2006-01-10', 'there'])
@@ -43,7 +43,7 @@ class SplitDateTimeFieldTest(SimpleTestCase):
         self.assertIsNone(f.clean(['', '']))
         with self.assertRaisesMessage(ValidationError, "'Enter a list of values.'"):
             f.clean('hello')
-        with six.assertRaisesRegex(self, ValidationError, "'Enter a valid date\.', u?'Enter a valid time\.'"):
+        with six.assertRaisesRegex(self, ValidationError, r"'Enter a valid date\.', u?'Enter a valid time\.'"):
             f.clean(['hello', 'there'])
         with self.assertRaisesMessage(ValidationError, "'Enter a valid time.'"):
             f.clean(['2006-01-10', 'there'])
diff --git a/tests/forms_tests/tests/test_forms.py b/tests/forms_tests/tests/test_forms.py
index f86ab2d43c..44034d310d 100644
--- a/tests/forms_tests/tests/test_forms.py
+++ b/tests/forms_tests/tests/test_forms.py
@@ -2914,7 +2914,7 @@ Good luck picking a username that doesn&#39;t already exist.</p>
         self.assertEqual('+61.287654321 ext. 123 (label: )', f.clean(['+61', '287654321', '123']))
         six.assertRaisesRegex(
             self, ValidationError,
-            "'Enter a complete value\.', u?'Enter an extension\.'", f.clean, ['', '', '', 'Home']
+            r"'Enter a complete value\.', u?'Enter an extension\.'", f.clean, ['', '', '', 'Home']
         )
         with self.assertRaisesMessage(ValidationError, "'Enter a valid country code.'"):
             f.clean(['61', '287654321', '123', 'Home'])
@@ -2930,7 +2930,7 @@ Good luck picking a username that doesn&#39;t already exist.</p>
         self.assertEqual('+61.287654321 ext. 123 (label: )', f.clean(['+61', '287654321', '123']))
         six.assertRaisesRegex(
             self, ValidationError,
-            "'Enter a complete value\.', u?'Enter an extension\.'", f.clean, ['', '', '', 'Home']
+            r"'Enter a complete value\.', u?'Enter an extension\.'", f.clean, ['', '', '', 'Home']
         )
         with self.assertRaisesMessage(ValidationError, "'Enter a valid country code.'"):
             f.clean(['61', '287654321', '123', 'Home'])
diff --git a/tests/gis_tests/gdal_tests/test_raster.py b/tests/gis_tests/gdal_tests/test_raster.py
index 8a0aa09b00..8137aeaeb0 100644
--- a/tests/gis_tests/gdal_tests/test_raster.py
+++ b/tests/gis_tests/gdal_tests/test_raster.py
@@ -71,7 +71,7 @@ class GDALRasterTests(unittest.TestCase):
 
     def test_rs_name_repr(self):
         self.assertEqual(self.rs_path, self.rs.name)
-        six.assertRegex(self, repr(self.rs), "<Raster object at 0x\w+>")
+        six.assertRegex(self, repr(self.rs), r"<Raster object at 0x\w+>")
 
     def test_rs_driver(self):
         self.assertEqual(self.rs.driver.name, 'GTiff')
diff --git a/tests/gis_tests/test_spatialrefsys.py b/tests/gis_tests/test_spatialrefsys.py
index 652dab3130..93ff3f6263 100644
--- a/tests/gis_tests/test_spatialrefsys.py
+++ b/tests/gis_tests/test_spatialrefsys.py
@@ -19,7 +19,7 @@ test_srs = ({
     # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
     'ellipsoid': (6378137.0, 6356752.3, 298.257223563),
     'eprec': (1, 1, 9),
-    'wkt': re.sub('[\s+]', '', """
+    'wkt': re.sub(r'[\s+]', '', """
         GEOGCS["WGS 84",
     DATUM["WGS_1984",
         SPHEROID["WGS 84",6378137,298.257223563,
diff --git a/tests/i18n/test_extraction.py b/tests/i18n/test_extraction.py
index 5ea574530f..75b1d80b79 100644
--- a/tests/i18n/test_extraction.py
+++ b/tests/i18n/test_extraction.py
@@ -97,7 +97,7 @@ class ExtractorTests(POFileAssertionMixin, RunInTmpDirMixin, SimpleTestCase):
         self.fail("The token '%s' could not be found in %s, please check the test config" % (token, path))
 
     def assertLocationCommentPresent(self, po_filename, line_number, *comment_parts):
-        """
+        r"""
         self.assertLocationCommentPresent('django.po', 42, 'dirA', 'dirB', 'foo.py')
 
         verifies that the django.po file has a gettext-style location comment of the form
@@ -307,7 +307,7 @@ class BasicExtractorTests(ExtractorTests):
                 self, str(ws[2].message),
                 r"The translator-targeted comment 'Translators: ignored i18n "
                 r"comment #4' \(file templates[/\\]comments.thtml, line 8\) "
-                "was ignored, because it wasn't the last item on the line\."
+                r"was ignored, because it wasn't the last item on the line\."
             )
         # Now test .po file contents
         self.assertTrue(os.path.exists(self.PO_FILE))
diff --git a/tests/i18n/tests.py b/tests/i18n/tests.py
index b0f77cfe06..5a05d16082 100644
--- a/tests/i18n/tests.py
+++ b/tests/i18n/tests.py
@@ -747,7 +747,7 @@ class FormattingTests(SimpleTestCase):
         self.maxDiff = 3000
         # Catalan locale
         with translation.override('ca', deactivate=True):
-            self.assertEqual('j \d\e F \d\e Y', get_format('DATE_FORMAT'))
+            self.assertEqual(r'j \d\e F \d\e Y', get_format('DATE_FORMAT'))
             self.assertEqual(1, get_format('FIRST_DAY_OF_WEEK'))
             self.assertEqual(',', get_format('DECIMAL_SEPARATOR'))
             self.assertEqual('10:15', time_format(self.t))
diff --git a/tests/lookup/tests.py b/tests/lookup/tests.py
index 588e2a9efb..c1b4e9be51 100644
--- a/tests/lookup/tests.py
+++ b/tests/lookup/tests.py
@@ -411,7 +411,7 @@ class LookupTests(TestCase):
         Article.objects.create(headline='Article with \\ backslash', pub_date=datetime(2005, 11, 22))
         self.assertQuerysetEqual(
             Article.objects.filter(headline__contains='\\'),
-            ['<Article: Article with \ backslash>']
+            [r'<Article: Article with \ backslash>']
         )
 
     def test_exclude(self):
diff --git a/tests/migrations/test_executor.py b/tests/migrations/test_executor.py
index 847b11c088..93651d74bc 100644
--- a/tests/migrations/test_executor.py
+++ b/tests/migrations/test_executor.py
@@ -686,7 +686,7 @@ class ExecutorUnitTests(TestCase):
         self.assertEqual(plan, [(a2_impl, True)])
 
     def test_minimize_rollbacks_branchy(self):
-        """
+        r"""
         Minimize rollbacks when target has multiple in-app children.
 
         a: 1 <---- 3 <--\
@@ -731,7 +731,7 @@ class ExecutorUnitTests(TestCase):
         self.assertEqual(plan, exp)
 
     def test_backwards_nothing_to_do(self):
-        """
+        r"""
         If the current state satisfies the given target, do nothing.
 
         a: 1 <--- 2
diff --git a/tests/migrations/test_graph.py b/tests/migrations/test_graph.py
index 472ec5a3ed..ad7e04581c 100644
--- a/tests/migrations/test_graph.py
+++ b/tests/migrations/test_graph.py
@@ -68,7 +68,7 @@ class GraphTests(SimpleTestCase):
         )
 
     def test_complex_graph(self):
-        """
+        r"""
         Tests a complex dependency graph:
 
         app_a:  0001 <-- 0002 <--- 0003 <-- 0004
diff --git a/tests/migrations/test_loader.py b/tests/migrations/test_loader.py
index e8f3b71ee8..b464209a98 100644
--- a/tests/migrations/test_loader.py
+++ b/tests/migrations/test_loader.py
@@ -427,7 +427,7 @@ class LoaderTests(TestCase):
     ]})
     def test_loading_squashed_ref_squashed(self):
         "Tests loading a squashed migration with a new migration referencing it"
-        """
+        r"""
         The sample migrations are structured like this:
 
         app_1       1 --> 2 ---------------------*--> 3        *--> 4
diff --git a/tests/model_forms/models.py b/tests/model_forms/models.py
index 0de67eb1f9..1b64477a20 100644
--- a/tests/model_forms/models.py
+++ b/tests/model_forms/models.py
@@ -169,7 +169,7 @@ class CustomFF(models.Model):
 
 
 class FilePathModel(models.Model):
-    path = models.FilePathField(path=os.path.dirname(upath(__file__)), match=".*\.py$", blank=True)
+    path = models.FilePathField(path=os.path.dirname(upath(__file__)), match=r".*\.py$", blank=True)
 
 
 try:
diff --git a/tests/template_tests/syntax_tests/test_if_equal.py b/tests/template_tests/syntax_tests/test_if_equal.py
index db02b090c0..6124608b08 100644
--- a/tests/template_tests/syntax_tests/test_if_equal.py
+++ b/tests/template_tests/syntax_tests/test_if_equal.py
@@ -98,7 +98,7 @@ class IfEqualTagTests(SimpleTestCase):
 
     @setup({'ifequal-split09': r"{% ifequal a 'slash\man' %}yes{% else %}no{% endifequal %}"})
     def test_ifequal_split09(self):
-        output = self.engine.render_to_string('ifequal-split09', {'a': 'slash\man'})
+        output = self.engine.render_to_string('ifequal-split09', {'a': r'slash\man'})
         self.assertEqual(output, 'yes')
 
     @setup({'ifequal-split10': r"{% ifequal a 'slash\man' %}yes{% else %}no{% endifequal %}"})
diff --git a/tests/utils_tests/test_http.py b/tests/utils_tests/test_http.py
index ef4cb90ac4..e90d5e397d 100644
--- a/tests/utils_tests/test_http.py
+++ b/tests/utils_tests/test_http.py
@@ -95,9 +95,9 @@ class TestUtilsHttp(unittest.TestCase):
             r'\/example.com',
             r'/\example.com',
             'http:///example.com',
-            'http:/\//example.com',
-            'http:\/example.com',
-            'http:/\example.com',
+            r'http:/\//example.com',
+            r'http:\/example.com',
+            r'http:/\example.com',
             'javascript:alert("XSS")',
             '\njavascript:alert(x)',
             '\x08//example.com',
diff --git a/tests/utils_tests/test_jslex.py b/tests/utils_tests/test_jslex.py
index 8308d2830b..dbf0d41b77 100644
--- a/tests/utils_tests/test_jslex.py
+++ b/tests/utils_tests/test_jslex.py
@@ -67,7 +67,7 @@ class JsTokensTest(SimpleTestCase):
         (r"""/a[\]]b/""", [r"""regex /a[\]]b/"""]),
         (r"""/[\]/]/gi""", [r"""regex /[\]/]/gi"""]),
         (r"""/\[[^\]]+\]/gi""", [r"""regex /\[[^\]]+\]/gi"""]),
-        ("""
+        (r"""
             rexl.re = {
             NAME: /^(?![0-9])(?:\w)+|^"(?:[^"]|"")+"/,
             UNQUOTED_LITERAL: /^@(?:(?![0-9])(?:\w|\:)+|^"(?:[^"]|"")+")\[[^\]]+\]/,
@@ -86,7 +86,7 @@ class JsTokensTest(SimpleTestCase):
          "punct }", "punct ;"
          ]),
 
-        ("""
+        (r"""
             rexl.re = {
             NAME: /^(?![0-9])(?:\w)+|^"(?:[^"]|"")+"/,
             UNQUOTED_LITERAL: /^@(?:(?![0-9])(?:\w|\:)+|^"(?:[^"]|"")+")\[[^\]]+\]/,