diff --git a/test/t/runtimeerror.rb b/test/t/runtimeerror.rb
index 3e0636186..b8d64a726 100644
--- a/test/t/runtimeerror.rb
+++ b/test/t/runtimeerror.rb
@@ -2,5 +2,5 @@
 # RuntimeError ISO Test
 
 assert('RuntimeError', '15.2.28') do
-  RuntimeError.class == Class
+  assert_equal RuntimeError.class, Class
 end