diff --git a/Gemfile.lock b/Gemfile.lock
index d57647c..4c1eb88 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,20 +2,16 @@ PATH
   remote: .
   specs:
     ideal (0.2.0)
-      activesupport
       builder
       nap
 
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (3.1.3)
-      multi_json (~> 1.0)
     builder (3.0.0)
     metaclass (0.0.1)
     mocha (0.10.0)
       metaclass (~> 0.0.1)
-    multi_json (1.0.4)
     nap (0.4)
     rake (0.9.2.2)
 
diff --git a/ideal.gemspec b/ideal.gemspec
index 9e322e1..f7b6f01 100644
--- a/ideal.gemspec
+++ b/ideal.gemspec
@@ -22,7 +22,6 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency             "activesupport"
   s.add_dependency             "builder"
   s.add_dependency             "nap"
   s.add_development_dependency "mocha"
diff --git a/lib/ideal.rb b/lib/ideal.rb
index 286d6e0..56fce30 100644
--- a/lib/ideal.rb
+++ b/lib/ideal.rb
@@ -1,6 +1,5 @@
 # encoding: utf-8
 
-require 'active_support/core_ext'
 require 'builder'
 require 'rest'
 
diff --git a/lib/ideal/gateway.rb b/lib/ideal/gateway.rb
index 8328a92..86c615f 100644
--- a/lib/ideal/gateway.rb
+++ b/lib/ideal/gateway.rb
@@ -273,6 +273,14 @@ def created_at_timestamp
       Time.now.gmtime.strftime("%Y-%m-%dT%H:%M:%S.000Z")
     end
 
+    def camelize(lower_case_and_underscored_word, first_letter_in_uppercase = true)
+      if first_letter_in_uppercase
+        lower_case_and_underscored_word.to_s.gsub(/\/(.?)/) { "::#{$1.upcase}" }.gsub(/(?:^|_)(.)/) { $1.upcase }
+      else
+        lower_case_and_underscored_word.to_s[0].chr.downcase + camelize(lower_case_and_underscored_word)[1..-1]
+      end
+    end
+
     # iDeal doesn't really seem to care about nice looking keys in their XML.
     # Probably some Java XML class, hence the method name.
     def javaize_key(key)
@@ -291,7 +299,7 @@ def javaize_key(key)
       when 'merchant_return_url'
         'merchantReturnURL'
       when 'token_code', 'expiration_period', 'entrance_code'
-        key[0,1] + key.camelize[1..-1]
+        key[0,1] + camelize(key)[1..-1]
       when /^(\w+)_id$/
         "#{$1}ID"
       else
@@ -324,7 +332,7 @@ def xml_from_array(builder, tags_and_values)
     def requires!(options, *keys)
       missing = keys - options.keys
       unless missing.empty?
-        raise ArgumentError, "Missing required options: #{missing.to_sentence}"
+        raise ArgumentError, "Missing required options: #{missing.map { |m| m.to_s }.join(', ')}"
       end
     end
 
diff --git a/lib/ideal/response.rb b/lib/ideal/response.rb
index 2a3d459..98b1cb5 100644
--- a/lib/ideal/response.rb
+++ b/lib/ideal/response.rb
@@ -190,7 +190,7 @@ def initialize(response_body, options = {})
     # <tt>:failure</tt>.
     def status
       status = text('//status')
-      status.downcase.to_sym unless status.blank?
+      status.downcase.to_sym unless (status.strip == '')
     end
 
     # Returns whether or not the authenticity of the message could be
diff --git a/test/helper.rb b/test/helper.rb
index f8494f1..b5f8bf1 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -19,7 +19,7 @@ class TestCase
       private
 
       def all_fixtures
-        @@fixtures ||= load_fixtures
+        @fixtures ||= load_fixtures
       end
 
       def fixtures(key)
@@ -29,17 +29,7 @@ def fixtures(key)
 
       def load_fixtures
         file = File.exists?(LOCAL_CREDENTIALS) ? LOCAL_CREDENTIALS : DEFAULT_CREDENTIALS
-        yaml_data = YAML.load(File.read(file))
-        symbolize_keys(yaml_data)
-
-        yaml_data
-      end
-
-      def symbolize_keys(hash)
-        return unless hash.is_a?(Hash)
-
-        hash.symbolize_keys!
-        hash.each{|k,v| symbolize_keys(v)}
+        YAML.load(File.read(file))
       end
     end
   end
diff --git a/test/remote_test.rb b/test/remote_test.rb
index 818574d..75095d7 100644
--- a/test/remote_test.rb
+++ b/test/remote_test.rb
@@ -4,7 +4,7 @@
 
 class IdealTest < Test::Unit::TestCase
   def setup
-    setup_ideal_gateway(fixtures(:default))
+    setup_ideal_gateway(fixtures('default'))
     Ideal::Gateway.environment = :test
 
     @gateway = Ideal::Gateway.new
@@ -132,7 +132,7 @@ def test_transaction(type)
   def setup_ideal_gateway(fixture)
     fixture = fixture.dup
     # The passphrase needs to be set first, otherwise the key won't initialize properly
-    if passphrase = fixture.delete(:passphrase)
+    if passphrase = fixture.delete('passphrase')
       Ideal::Gateway.passphrase = passphrase
     end
     fixture.each { |key, value| Ideal::Gateway.send("#{key}=", value) }