diff --git a/lib/rocco.rb b/lib/rocco.rb
index 1c0aaed..b4f4508 100644
--- a/lib/rocco.rb
+++ b/lib/rocco.rb
@@ -52,8 +52,7 @@ require 'net/http'
 
 # Code is run through [Pygments](http://pygments.org/) for syntax
 # highlighting. If it's not installed, locally, use a webservice.
-include FileTest
-if !ENV['PATH'].split(':').any? { |dir| executable?("#{dir}/pygmentize") }
+if !ENV['PATH'].split(':').any? { |dir| File.executable?("#{dir}/pygmentize") }
   warn "WARNING: Pygments not found. Using webservice."
 end
 
@@ -159,7 +158,7 @@ class Rocco
   # Returns `true` if `pygmentize` is available locally, `false` otherwise.
   def pygmentize?
     @_pygmentize ||= ENV['PATH'].split(':').
-      any? { |dir| executable?("#{dir}/pygmentize") }
+      any? { |dir| File.executable?("#{dir}/pygmentize") }
   end
 
   # If `pygmentize` is available, we can use it to autodetect a file's