diff --git a/test/ruby/enc/test_grapheme_breaks.rb b/test/ruby/enc/test_grapheme_breaks.rb
index 5a4a8326c9..7f6c776113 100644
--- a/test/ruby/enc/test_grapheme_breaks.rb
+++ b/test/ruby/enc/test_grapheme_breaks.rb
@@ -22,8 +22,6 @@ class BreakTest
                         end.join
                     end
     @string = @clusters.join
-    # remove the following line once we have fixed bug #15337
-    raise ArgumentError if @string == "\r\n"
   end
 end