diff --git a/spec/acceptance/chop_spec.rb b/spec/acceptance/chop_spec.rb
index dbc28da7e..a16a71026 100755
--- a/spec/acceptance/chop_spec.rb
+++ b/spec/acceptance/chop_spec.rb
@@ -19,7 +19,7 @@
     end
 
     it 'should eat the last two characters of \r\n' do
-      pp = <<-EOS
+      pp = <<-'EOS'
       $input = "test\r\n"
       if size($input) != 6 {
         fail("Size of ${input} is not 6.")