diff --git a/Lib/unittest/loader.py b/Lib/unittest/loader.py
--- a/Lib/unittest/loader.py
+++ b/Lib/unittest/loader.py
@@ -111,7 +111,7 @@
         elif (isinstance(obj, types.FunctionType) and
               isinstance(parent, type) and
               issubclass(parent, case.TestCase)):
-            name = obj.__name__
+            name = parts[-1]
             inst = parent(name)
             # static methods follow a different path
             if not isinstance(getattr(inst, name), types.FunctionType):
diff --git a/Lib/unittest/test/test_loader.py b/Lib/unittest/test/test_loader.py
--- a/Lib/unittest/test/test_loader.py
+++ b/Lib/unittest/test/test_loader.py
@@ -806,6 +806,22 @@
         ref_suite = unittest.TestSuite([MyTestCase('test')])
         self.assertEqual(list(suite), [ref_suite])
 
+    # Make sure the dotted name resolution works even if the actual
+    # function doesn't have the same name as is used to find it.
+    def test_loadTestsFromName__function_with_different_name_than_method(self):
+        # lambdas have the name '<lambda>'.
+        m = types.ModuleType('m')
+        class MyTestCase(unittest.TestCase):
+            test = lambda: 1
+        m.testcase_1 = MyTestCase
+
+        loader = unittest.TestLoader()
+        suite = loader.loadTestsFromNames(['testcase_1.test'], m)
+        self.assertIsInstance(suite, loader.suiteClass)
+
+        ref_suite = unittest.TestSuite([MyTestCase('test')])
+        self.assertEqual(list(suite), [ref_suite])
+
     # "The specifier name is a ``dotted name'' that may resolve ... to ... a
     # test method within a test case class"
     #