diff --git a/cmd/brew-cask-tests.rb b/cmd/brew-cask-tests.rb
index 1971299363..92ef3ddd90 100755
--- a/cmd/brew-cask-tests.rb
+++ b/cmd/brew-cask-tests.rb
@@ -1,18 +1,3 @@
-#!/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -W0 -EUTF-8:UTF-8
-# encoding: UTF-8
-
-# Ruby version check
-unless RUBY_VERSION.split(".").first.to_i >= 2
-  alt_ruby = which "ruby"
-  alt_ruby_version = `#{alt_ruby} --version`.chomp[%r{\d\.\d}, 0] if alt_ruby
-
-  unless alt_ruby && alt_ruby_version.split(".").first.to_i >= 2
-    abort "Ruby 2.0 or above is required. You can install it with `brew install ruby`."
-  end
-
-  exec alt_ruby, "-W0", "-I#{HOMEBREW_LIBRARY_PATH}", "-rglobal", __FILE__, *ARGV
-end
-
 require "English"
 
 repo_root = Pathname(__FILE__).realpath.parent.parent
diff --git a/cmd/brew-cask.rb b/cmd/brew-cask.rb
index 4066177afa..825c4cb818 100755
--- a/cmd/brew-cask.rb
+++ b/cmd/brew-cask.rb
@@ -1,18 +1,3 @@
-#!/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -W0 -EUTF-8:UTF-8
-# encoding: UTF-8
-
-# Ruby version check
-unless RUBY_VERSION.split(".").first.to_i >= 2
-  alt_ruby = which "ruby"
-  alt_ruby_version = `#{alt_ruby} --version`.chomp[%r{\d\.\d}, 0] if alt_ruby
-
-  unless alt_ruby && alt_ruby_version.split(".").first.to_i >= 2
-    abort "Ruby 2.0 or above is required. You can install it with `brew install ruby`."
-  end
-
-  exec alt_ruby, "-W0", "-I#{HOMEBREW_LIBRARY_PATH}", "-rglobal", __FILE__, *ARGV
-end
-
 require "pathname"
 
 $LOAD_PATH.unshift(File.expand_path("../../lib", Pathname.new(__FILE__).realpath))
diff --git a/developer/bin/list_running_app_ids b/developer/bin/list_running_app_ids
index bd4133407b..136a578d40 100755
--- a/developer/bin/list_running_app_ids
+++ b/developer/bin/list_running_app_ids
@@ -21,8 +21,8 @@ $opt_test = nil
 ###
 
 def check_ruby
-  if RUBY_VERSION.to_f < 1.9
-    print "You are currently using Ruby ", RUBY_VERSION, ", but version 1.9 or above is required."
+  if RUBY_VERSION.to_f < 2.0
+    print "You are currently using Ruby ", RUBY_VERSION, ", but version 2.0 or above is required."
     exit 1
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index b1ffbbbc0d..e86e200274 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -7,9 +7,6 @@ if ENV["COVERAGE"]
   Coveralls.wear_merged!
 end
 
-# just in case
-raise "brew-cask: Ruby 2.0 or greater is required." if RUBY_VERSION.to_i < 2
-
 project_root = Pathname.new(File.expand_path("../..", __FILE__))
 
 # add Homebrew to load path
diff --git a/test/syntax_test.rb b/test/syntax_test.rb
index 1c7f735460..0ea832bde6 100644
--- a/test/syntax_test.rb
+++ b/test/syntax_test.rb
@@ -3,23 +3,14 @@ require "test_helper"
 describe "Syntax check" do
   project_root = Pathname.new(File.expand_path("#{File.dirname(__FILE__)}/../"))
   backend_files = Dir[project_root.join("**", "*.rb")].reject { |f| f.match %r{/vendor/|/Casks/} }
-  %w[2.0 2.1].each do |major_version|
-    describe "under Ruby #{major_version}" do
-      interpreter = Pathname.new("/System/Library/Frameworks/Ruby.framework/Versions/#{major_version}/usr/bin/ruby")
-      interpreter = Pathname.new(Dir["#{ENV['HOME']}/.rbenv/versions/#{major_version}*/bin/ruby"].first.to_s)  unless interpreter.exist?
-      interpreter = Pathname.new(Dir["#{ENV['HOME']}/.rvm/rubies/ruby-#{major_version}*/bin/ruby"].first.to_s) unless interpreter.exist?
-      interpreter = Pathname.new(Dir["/usr/local/bin/ruby{-,}#{major_version}*"].first.to_s)                   unless interpreter.exist?
-      interpreter = Pathname.new(Dir["/opt/local/bin/ruby{-,}#{major_version}*"].first.to_s)                   unless interpreter.exist?
-      flags = %w[-c]
-      flags.unshift "--disable-all"
-      backend_files.each do |file|
-        it "#{file} is valid Ruby" do
-          skip("Ruby #{major_version} not found") unless interpreter.exist?
-          args = flags + ["--", file]
-          shutup do
-            raise SyntaxError, "#{file} failed syntax check" unless system(interpreter, *args)
-          end
-        end
+  interpreter = RUBY_PATH
+  flags = %w[-c]
+  flags.unshift "--disable-all"
+  backend_files.each do |file|
+    it "#{file} is valid Ruby" do
+      args = flags + ["--", file]
+      shutup do
+        raise SyntaxError, "#{file} failed syntax check" unless system(interpreter, *args)
       end
     end
   end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 58b72201bb..dfe2484ed1 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -7,9 +7,6 @@ if ENV["COVERAGE"]
   Coveralls.wear_merged!
 end
 
-# just in case
-raise "brew-cask: Ruby 2.0 or greater is required." if RUBY_VERSION.to_i < 2
-
 project_root = Pathname.new(File.expand_path("../..", __FILE__))
 
 # add Homebrew to load path