diff --git a/Gemfile b/Gemfile
index 06b04f6..aabeeca 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,16 +2,3 @@ source 'https://rubygems.org'
 
 # Specify gem's dependencies in docile.gemspec
 gemspec
-
-# Explicitly require test gems for Travis CI, since we're excluding dev dependencies
-group :test do
-  gem 'rake', '~> 0.9.2'
-  gem 'rspec', '~> 2.11.0'
-  gem 'mime-types', '~> 1.25.1'
-  gem 'coveralls', :require => false
-
-  platform :rbx do
-    gem 'rubysl'            # Since 2.2.0, Rubinius needs Ruby standard lib as gem
-    gem 'rubinius-coverage' # Coverage tooling for SimpleCov on Rubinius
-  end
-end
diff --git a/docile.gemspec b/docile.gemspec
index 4187d52..98c68dc 100644
--- a/docile.gemspec
+++ b/docile.gemspec
@@ -20,7 +20,8 @@ Gem::Specification.new do |s|
 
   # Running rspec tests from rake
   s.add_development_dependency 'rake', '~> 0.9.2'
-  s.add_development_dependency 'rspec', '~> 2.11.0'
+  s.add_development_dependency 'rspec', '~> 2.14.0'
+  s.add_development_dependency 'mime-types', '~> 1.25.1'
 
   # Github flavored markdown in YARD documentation
   # http://blog.nikosd.com/2011/11/github-flavored-markdown-in-yard.html
@@ -30,4 +31,9 @@ Gem::Specification.new do |s|
 
   # Coveralls test coverage tool
   s.add_development_dependency 'coveralls'
+
+  if 'rbx' == RUBY_ENGINE then
+    s.add_development_dependency 'rubysl'
+    s.add_development_dependency 'rubinius-coverage'
+  end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index f46df08..4cd8c40 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -20,3 +20,9 @@ lib_dir = File.join(File.dirname(test_dir), 'lib')
 $LOAD_PATH.unshift lib_dir unless $LOAD_PATH.include?(lib_dir)
 
 require 'docile'
+
+RSpec.configure do |config|
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+end
\ No newline at end of file