1 files changed, 3 insertions, 3 deletions
diff --git a/test/ruby/test_io_buffer.rb b/test/ruby/test_io_buffer.rb
index a395dccf2b..362845ec2a 100644
--- a/test/ruby/test_io_buffer.rb
+++ b/test/ruby/test_io_buffer.rb
@@ -60,17 +60,17 @@ class TestIOBuffer < Test::Unit::TestCase
     buffer = IO::Buffer.new(128, IO::Buffer::INTERNAL|IO::Buffer::READONLY)
     assert buffer.readonly?
 
-    assert_raise IO::Buffer::MutationError do
+    assert_raise IO::Buffer::AccessError do
       buffer.set_string("")
     end
 
-    assert_raise IO::Buffer::MutationError do
+    assert_raise IO::Buffer::AccessError do
       buffer.set_string("!", 1)
     end
   end
 
   def test_file_mapped
-    buffer = File.open(__FILE__) {|file| IO::Buffer.map(file)}
+    buffer = File.open(__FILE__) {|file| IO::Buffer.map(file, nil, 0, IO::Buffer::READONLY)}
     contents = buffer.get_string
 
     assert_include contents, "Hello World"