diff --git a/wagtail/contrib/postgres_search/tests/test_backend.py b/wagtail/contrib/postgres_search/tests/test_backend.py
index 2aeb0a821..72d489fc3 100644
--- a/wagtail/contrib/postgres_search/tests/test_backend.py
+++ b/wagtail/contrib/postgres_search/tests/test_backend.py
@@ -71,28 +71,3 @@ class TestPostgresSearchBackend(BackendTests, TestCase):
                              [(6, 'A'), (4, 'B'), (2, 'C'), (0, 'D')])
         self.assertListEqual(determine_boosts_weights([-2, -1, 0, 1, 2, 3, 4]),
                              [(4, 'A'), (2, 'B'), (0, 'C'), (-2, 'D')])
-
-    def test_ranking(self):
-        title_search_field = SearchTest.search_fields[0]
-        original_title_boost = title_search_field.boost
-        title_search_field.boost = 2
-
-        SearchTest.objects.all().delete()
-
-        vivaldi_composer = SearchTest.objects.create(
-            title='Antonio Vivaldi',
-            content='Born in 1678, Vivaldi is one of Earth’s '
-                    'most inspired composers. '
-                    'Read more about it in your favorite browser.')
-        vivaldi_browser = SearchTest.objects.create(
-            title='The Vivaldi browser',
-            content='This web browser is based on WebKit.')
-
-        results = self.backend.search('vivaldi', SearchTest)
-        self.assertListEqual(list(results),
-                             [vivaldi_composer, vivaldi_browser])
-        results = self.backend.search('browser', SearchTest)
-        self.assertListEqual(list(results),
-                             [vivaldi_browser, vivaldi_composer])
-
-        title_search_field.boost = original_title_boost