made the tests a bit more robust, but they may now be more DANGEROUS!

spec/lib/jasmine/headless/task_spec.rb

@@ -14,6 +14,16 @@ module Jasmine
 end
 describe Jasmine::Headless::Task do
   it 'should not explode when Rails is undefined' do
+    Object.send(:remove_const, :Rails) if defined?(Rails)
+    Jasmine::Headless::Task.new('jasmine:headless') do |t|
+    end
+  end
+  it 'should be OK if rails is defined' do
+    module Rails
+      def self.version
+        return "0"
+      end
+    end
     Jasmine::Headless::Task.new('jasmine:headless') do |t|
     end
   end