#11282: add back the fail* methods and assertDictContainsSubset.
diff --git a/Lib/unittest/test/test_assertions.py b/Lib/unittest/test/test_assertions.py
index 4a646c3..a1d20eb 100644
--- a/Lib/unittest/test/test_assertions.py
+++ b/Lib/unittest/test/test_assertions.py
@@ -223,6 +223,15 @@
                              "\+ \{'key': 'value'\}$",
                              "\+ \{'key': 'value'\} : oops$"])
 
+    def testAssertDictContainsSubset(self):
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+
+            self.assertMessages('assertDictContainsSubset', ({'key': 'value'}, {}),
+                                ["^Missing: 'key'$", "^oops$",
+                                 "^Missing: 'key'$",
+                                 "^Missing: 'key' : oops$"])
+
     def testAssertMultiLineEqual(self):
         self.assertMessages('assertMultiLineEqual', ("", "foo"),
                             [r"\+ foo$", "^oops$",