diff --git a/test/win32ole/test_win32ole.rb b/test/win32ole/test_win32ole.rb
index ba4413e025..40b6a81544 100644
--- a/test/win32ole/test_win32ole.rb
+++ b/test/win32ole/test_win32ole.rb
@@ -1,4 +1,4 @@
-#
+# coding: us-ascii
 
 begin
   require 'win32ole'
@@ -379,7 +379,7 @@ if defined?(WIN32OLE)
           open(fname, "r:ascii-8bit") {|ifs|
             str = ifs.read
           }
-          assert_equal("\244\242".b, str)
+          assert_equal("\244\242", str)
         end
 
       ensure