test/hermes/assertions_test.rb in hermes-0.4.1 vs test/hermes/assertions_test.rb in hermes-0.5.0

@@ -473,10 +473,12 @@
     end
   end
 
   private
   def assert_failure(msg, &block)
-    assert_raise_with_message Test::Unit::AssertionFailedError, msg do
+    klass = defined?(Test::Unit::AssertionFailedError) ?
+      Test::Unit::AssertionFailedError : MiniTest::Assertion
+    assert_raise_with_message klass, msg do
       block.call
     end
   end
 
   def random_string(length=20)