diff --git a/test/ansi_color.rb b/test/ansi_color.rb
index 31173e3..3b5f552 100644
--- a/test/ansi_color.rb
+++ b/test/ansi_color.rb
@@ -40,5 +40,5 @@
 end
 
 assert('Print string in every color') do
-  "".colors.each { |c| print ".".send(c)}
+  "".colors.each { |c| print ".".__send__(c)}
 end