diff --git a/test/ruby/test_yield.rb b/test/ruby/test_yield.rb
index 85cff76263..927df054f0 100644
--- a/test/ruby/test_yield.rb
+++ b/test/ruby/test_yield.rb
@@ -96,17 +96,17 @@ class TestRubyYieldGen < Test::Unit::TestCase
     :f_block_arg => [['&', 'var']],
     :f_arg_item => [[:f_norm_arg],
                     ['(', :f_margs, ')']],
-    :f_margs => [[:f_marg_head],
-                 [:f_marg_head, ',', '*', :f_norm_arg],
-                 [:f_marg_head, ',', '*', :f_norm_arg, ',', :f_marg],
-                 [:f_marg_head, ',', '*'],
-                 [:f_marg_head, ',', '*',              ',', :f_marg],
+    :f_margs => [[:f_marg_list],
+                 [:f_marg_list, ',', '*', :f_norm_arg],
+                 [:f_marg_list, ',', '*', :f_norm_arg, ',', :f_marg_list],
+                 [:f_marg_list, ',', '*'],
+                 [:f_marg_list, ',', '*',              ',', :f_marg_list],
                  [                   '*', :f_norm_arg],
-                 [                   '*', :f_norm_arg, ',', :f_marg],
+                 [                   '*', :f_norm_arg, ',', :f_marg_list],
                  [                   '*'],
-                 [                   '*',              ',', :f_marg]],
-    :f_marg_head => [[:f_marg],
-                     [:f_marg_head, ',', :f_marg]],
+                 [                   '*',              ',', :f_marg_list]],
+    :f_marg_list => [[:f_marg],
+                     [:f_marg_list, ',', :f_marg]],
     :f_marg => [[:f_norm_arg],
                 ['(', :f_margs, ')']],
     :f_norm_arg => [['var']],