No need to check if MiniTest::Assertions is defined

activesupport/test/test_case_test.rb

@@ -18,44 +18,42 @@ def options
       end
     end
 
-    if defined?(MiniTest::Assertions) && TestCase < MiniTest::Assertions
-      def test_callback_with_exception
-        tc = Class.new(TestCase) do
-          setup :bad_callback
-          def bad_callback; raise 'oh noes' end
-          def test_true; assert true end
-        end
-
-        test_name = 'test_true'
-        fr = FakeRunner.new
-
-        test = tc.new test_name
-        test.run fr
-        klass, name, exception = *fr.puked.first
-
-        assert_equal tc, klass
-        assert_equal test_name, name
-        assert_equal 'oh noes', exception.message
+    def test_callback_with_exception
+      tc = Class.new(TestCase) do
+        setup :bad_callback
+        def bad_callback; raise 'oh noes' end
+        def test_true; assert true end
       end
 
-      def test_teardown_callback_with_exception
-        tc = Class.new(TestCase) do
-          teardown :bad_callback
-          def bad_callback; raise 'oh noes' end
-          def test_true; assert true end
-        end
+      test_name = 'test_true'
+      fr = FakeRunner.new
 
-        test_name = 'test_true'
-        fr = FakeRunner.new
+      test = tc.new test_name
+      test.run fr
+      klass, name, exception = *fr.puked.first
 
-        test = tc.new test_name
-        test.run fr
-        klass, name, exception = *fr.puked.first
+      assert_equal tc, klass
+      assert_equal test_name, name
+      assert_equal 'oh noes', exception.message
+    end
 
-        assert_equal tc, klass
-        assert_equal test_name, name
-        assert_equal 'oh noes', exception.message
+    def test_teardown_callback_with_exception
+      tc = Class.new(TestCase) do
+        teardown :bad_callback
+        def bad_callback; raise 'oh noes' end
+        def test_true; assert true end
       end
+
+      test_name = 'test_true'
+      fr = FakeRunner.new
+
+      test = tc.new test_name
+      test.run fr
+      klass, name, exception = *fr.puked.first
+
+      assert_equal tc, klass
+      assert_equal test_name, name
+      assert_equal 'oh noes', exception.message
     end
   end
 end