diff --git a/test/t/syntax.rb b/test/t/syntax.rb
index 603547c7c..afb735e7f 100644
--- a/test/t/syntax.rb
+++ b/test/t/syntax.rb
@@ -423,10 +423,11 @@ assert('parenthesed do-block in cmdarg') do
 end
 
 assert('method definition in cmdarg') do
-  if false
+  result = class MethodDefinitionInCmdarg
+    def self.bar(arg); arg end
     bar def foo; self.each do end end
   end
-  true
+  assert_equal(:foo, result)
 end
 
 assert('optional argument in the rhs default expressions') do