diff --git a/bootstraptest/test_block.rb b/bootstraptest/test_block.rb
index 602909a9b2..96d78cc965 100644
--- a/bootstraptest/test_block.rb
+++ b/bootstraptest/test_block.rb
@@ -382,7 +382,6 @@ assert_equal 'nil', %q{
   m {|(v,(*))|}.inspect
 }
 
-
 # [ruby-dev:31153]
 assert_equal 'nil', %q{
   def m()
@@ -391,3 +390,10 @@ assert_equal 'nil', %q{
   m {|(*,a,b)|}.inspect
 }
 
+assert_equal 'nil', %q{
+  def m()
+    yield
+  end
+  m {|((*))|}.inspect
+}
+