diff --git a/django/test/testcases.py b/django/test/testcases.py
index 8203a3837d..253b249679 100644
--- a/django/test/testcases.py
+++ b/django/test/testcases.py
@@ -39,7 +39,7 @@ from django.utils.decorators import classproperty
 from django.utils.deprecation import RemovedInDjango20Warning
 from django.utils.encoding import force_text
 from django.utils.six.moves.urllib.parse import (
-    unquote, urljoin, urlparse, urlsplit, urlunsplit,
+    unquote, urljoin, urlparse, urlsplit,
 )
 from django.utils.six.moves.urllib.request import url2pathname
 from django.views.static import serve
@@ -245,7 +245,7 @@ class SimpleTestCase(unittest.TestCase):
         return modify_settings(**kwargs)
 
     def assertRedirects(self, response, expected_url, status_code=302,
-                        target_status_code=200, host=None, msg_prefix='',
+                        target_status_code=200, msg_prefix='',
                         fetch_redirect_response=True):
         """Asserts that a response redirected to a specific URL, and that the
         redirect URL can be loaded.
@@ -254,12 +254,6 @@ class SimpleTestCase(unittest.TestCase):
         TestClient to do a request (use fetch_redirect_response=False to check
         such links without fetching them).
         """
-        if host is not None:
-            warnings.warn(
-                "The host argument is deprecated and no longer used by assertRedirects",
-                RemovedInDjango20Warning, stacklevel=2
-            )
-
         if msg_prefix:
             msg_prefix += ": "
 
@@ -324,19 +318,6 @@ class SimpleTestCase(unittest.TestCase):
                     % (path, redirect_response.status_code, target_status_code)
                 )
 
-        if url != expected_url:
-            # For temporary backwards compatibility, try to compare with a relative url
-            e_scheme, e_netloc, e_path, e_query, e_fragment = urlsplit(expected_url)
-            relative_url = urlunsplit(('', '', e_path, e_query, e_fragment))
-            if url == relative_url:
-                warnings.warn(
-                    "assertRedirects had to strip the scheme and domain from the "
-                    "expected URL, as it was always added automatically to URLs "
-                    "before Django 1.9. Please update your expected URLs by "
-                    "removing the scheme and domain.",
-                    RemovedInDjango20Warning, stacklevel=2)
-                expected_url = relative_url
-
         self.assertEqual(
             url, expected_url,
             msg_prefix + "Response redirected to '%s', expected '%s'" % (url, expected_url)
diff --git a/docs/releases/2.0.txt b/docs/releases/2.0.txt
index 751b46cccf..984e13e9f1 100644
--- a/docs/releases/2.0.txt
+++ b/docs/releases/2.0.txt
@@ -243,3 +243,7 @@ these features.
 * The ``django.forms.extras`` package is removed.
 
 * The ``assignment_tag`` helper is removed.
+
+* The ``host`` argument to ``SimpleTestCase.assertsRedirects()`` is removed.
+  The compatibility layer which allows absolute URLs to be considered equal to
+  relative ones when the path is identical is also removed.
diff --git a/docs/topics/testing/tools.txt b/docs/topics/testing/tools.txt
index 5ff8563dd1..7c40955a0c 100644
--- a/docs/topics/testing/tools.txt
+++ b/docs/topics/testing/tools.txt
@@ -1479,11 +1479,6 @@ your test suite.
     the original request's scheme is used. If present, the scheme in
     ``expected_url`` is the one used to make the comparisons to.
 
-    .. deprecated:: 1.9
-
-        The ``host`` argument is deprecated, as redirections are no longer
-        forced to be absolute URLs.
-
 .. method:: SimpleTestCase.assertHTMLEqual(html1, html2, msg=None)
 
     Asserts that the strings ``html1`` and ``html2`` are equal. The comparison
diff --git a/tests/test_client_regress/tests.py b/tests/test_client_regress/tests.py
index 1e30017d5a..5598ed5280 100644
--- a/tests/test_client_regress/tests.py
+++ b/tests/test_client_regress/tests.py
@@ -15,14 +15,12 @@ from django.template import (
 )
 from django.template.response import SimpleTemplateResponse
 from django.test import (
-    Client, SimpleTestCase, TestCase, ignore_warnings, modify_settings,
-    override_settings,
+    Client, SimpleTestCase, TestCase, modify_settings, override_settings,
 )
 from django.test.client import RedirectCycleError, RequestFactory, encode_file
 from django.test.utils import ContextList, str_prefix
 from django.urls import NoReverseMatch, reverse
 from django.utils._os import upath
-from django.utils.deprecation import RemovedInDjango20Warning
 from django.utils.translation import ugettext_lazy
 
 from .models import CustomUser
@@ -514,15 +512,6 @@ class AssertRedirectsTests(SimpleTestCase):
             with self.assertRaises(AssertionError):
                 self.assertRedirects(response, 'http://testserver/secure_view/', status_code=302)
 
-    @ignore_warnings(category=RemovedInDjango20Warning)
-    def test_full_path_in_expected_urls(self):
-        """
-        Specifying a full URL as assertRedirects expected_url still
-        work as backwards compatible behavior until Django 2.0.
-        """
-        response = self.client.get('/redirect_view/')
-        self.assertRedirects(response, 'http://testserver/get_view/')
-
 
 @override_settings(ROOT_URLCONF='test_client_regress.urls')
 class AssertFormErrorTests(SimpleTestCase):