1 files changed, 2 insertions, 2 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 08f39c3a4a..f056c760a8 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2476,10 +2476,10 @@ End
   def test_invalid_advise
     feature4204 = '[ruby-dev:42887]'
     make_tempfile {|tf|
-      %w{Normal rand glark will_need zzzzzzzzzzzz \u2609}.map(&:to_sym).each do |adv|
+      %W{Normal rand glark will_need zzzzzzzzzzzz \u2609}.map(&:to_sym).each do |adv|
         [[0,0], [0, 20], [400, 2]].each do |offset, len|
           open(tf.path) do |t|
-            assert_raise(NotImplementedError, feature4204) { t.advise(adv, offset, len) }
+            assert_raise_with_message(NotImplementedError, /#{adv.inspect}/, feature4204) { t.advise(adv, offset, len) }
           end
         end
       end