diff --git a/.gitignore b/.gitignore
index 066a803..c388576 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,5 +3,3 @@ pkg
 *.gem
 .idea
 spec/*/log/*
-Gemfile.lock
-
diff --git a/Rakefile b/Rakefile
index 430032d..e4fff38 100644
--- a/Rakefile
+++ b/Rakefile
@@ -23,11 +23,10 @@ namespace :all do
       end
     end
 
-    desc "Update a gem given by the GEM environment variable"
+    desc "Update all gems, or a list of gem given by the GEM environment variable"
     task :update do
-      gem = ENV['GEM'] or raise "Name the gem you wish to update by setting a environment variable GEM"
       for_each_directory_of('spec/**/Gemfile') do |directory|
-        system("cd #{directory} && bundle update #{gem}")
+        system("cd #{directory} && bundle update #{ENV['GEM']}")
       end
     end
 
diff --git a/spec/rails-2.3/Gemfile.lock b/spec/rails-2.3/Gemfile.lock
new file mode 100644
index 0000000..7cb925c
--- /dev/null
+++ b/spec/rails-2.3/Gemfile.lock
@@ -0,0 +1,56 @@
+PATH
+  remote: ../..
+  specs:
+    assignable_values (0.5.1)
+      activerecord
+
+GEM
+  remote: http://rubygems.org/
+  specs:
+    actionmailer (2.3.10)
+      actionpack (= 2.3.10)
+    actionpack (2.3.10)
+      activesupport (= 2.3.10)
+      rack (~> 1.1.0)
+    activerecord (2.3.10)
+      activesupport (= 2.3.10)
+    activeresource (2.3.10)
+      activesupport (= 2.3.10)
+    activesupport (2.3.10)
+    columnize (0.3.6)
+    linecache (0.46)
+      rbx-require-relative (> 0.0.4)
+    rack (1.1.3)
+    rails (2.3.10)
+      actionmailer (= 2.3.10)
+      actionpack (= 2.3.10)
+      activerecord (= 2.3.10)
+      activeresource (= 2.3.10)
+      activesupport (= 2.3.10)
+      rake (>= 0.8.3)
+    rake (10.0.2)
+    rbx-require-relative (0.0.9)
+    rspec (1.3.2)
+    rspec-rails (1.3.4)
+      rack (>= 1.0.0)
+      rspec (~> 1.3.1)
+    rspec_candy (0.2.1)
+      rspec
+    ruby-debug (0.10.4)
+      columnize (>= 0.1)
+      ruby-debug-base (~> 0.10.4.0)
+    ruby-debug-base (0.10.4)
+      linecache (>= 0.3)
+    sqlite3 (1.3.6)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  assignable_values!
+  rails (= 2.3.10)
+  rspec (< 2)
+  rspec-rails (< 2)
+  rspec_candy
+  ruby-debug
+  sqlite3
diff --git a/spec/rails-3.0/Gemfile.lock b/spec/rails-3.0/Gemfile.lock
new file mode 100644
index 0000000..01769b2
--- /dev/null
+++ b/spec/rails-3.0/Gemfile.lock
@@ -0,0 +1,112 @@
+PATH
+  remote: ../..
+  specs:
+    assignable_values (0.5.1)
+      activerecord
+
+GEM
+  remote: http://rubygems.org/
+  specs:
+    abstract (1.0.0)
+    actionmailer (3.0.3)
+      actionpack (= 3.0.3)
+      mail (~> 2.2.9)
+    actionpack (3.0.3)
+      activemodel (= 3.0.3)
+      activesupport (= 3.0.3)
+      builder (~> 2.1.2)
+      erubis (~> 2.6.6)
+      i18n (~> 0.4)
+      rack (~> 1.2.1)
+      rack-mount (~> 0.6.13)
+      rack-test (~> 0.5.6)
+      tzinfo (~> 0.3.23)
+    activemodel (3.0.3)
+      activesupport (= 3.0.3)
+      builder (~> 2.1.2)
+      i18n (~> 0.4)
+    activerecord (3.0.3)
+      activemodel (= 3.0.3)
+      activesupport (= 3.0.3)
+      arel (~> 2.0.2)
+      tzinfo (~> 0.3.23)
+    activeresource (3.0.3)
+      activemodel (= 3.0.3)
+      activesupport (= 3.0.3)
+    activesupport (3.0.3)
+    arel (2.0.10)
+    builder (2.1.2)
+    columnize (0.3.6)
+    diff-lcs (1.1.3)
+    erubis (2.6.6)
+      abstract (>= 1.0.0)
+    i18n (0.6.1)
+    linecache (0.46)
+      rbx-require-relative (> 0.0.4)
+    mail (2.2.19)
+      activesupport (>= 2.3.6)
+      i18n (>= 0.4.0)
+      mime-types (~> 1.16)
+      treetop (~> 1.4.8)
+    mime-types (1.19)
+    polyglot (0.3.3)
+    rack (1.2.5)
+    rack-mount (0.6.14)
+      rack (>= 1.0.0)
+    rack-test (0.5.7)
+      rack (>= 1.0)
+    rails (3.0.3)
+      actionmailer (= 3.0.3)
+      actionpack (= 3.0.3)
+      activerecord (= 3.0.3)
+      activeresource (= 3.0.3)
+      activesupport (= 3.0.3)
+      bundler (~> 1.0)
+      railties (= 3.0.3)
+    railties (3.0.3)
+      actionpack (= 3.0.3)
+      activesupport (= 3.0.3)
+      rake (>= 0.8.7)
+      thor (~> 0.14.4)
+    rake (10.0.2)
+    rbx-require-relative (0.0.9)
+    rspec (2.12.0)
+      rspec-core (~> 2.12.0)
+      rspec-expectations (~> 2.12.0)
+      rspec-mocks (~> 2.12.0)
+    rspec-core (2.12.0)
+    rspec-expectations (2.12.0)
+      diff-lcs (~> 1.1.3)
+    rspec-mocks (2.12.0)
+    rspec-rails (2.12.0)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      railties (>= 3.0)
+      rspec-core (~> 2.12.0)
+      rspec-expectations (~> 2.12.0)
+      rspec-mocks (~> 2.12.0)
+    rspec_candy (0.2.1)
+      rspec
+    ruby-debug (0.10.4)
+      columnize (>= 0.1)
+      ruby-debug-base (~> 0.10.4.0)
+    ruby-debug-base (0.10.4)
+      linecache (>= 0.3)
+    sqlite3 (1.3.6)
+    thor (0.14.6)
+    treetop (1.4.12)
+      polyglot
+      polyglot (>= 0.3.1)
+    tzinfo (0.3.35)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  assignable_values!
+  rails (= 3.0.3)
+  rspec
+  rspec-rails
+  rspec_candy
+  ruby-debug
+  sqlite3
diff --git a/spec/rails-3.2/Gemfile.lock b/spec/rails-3.2/Gemfile.lock
new file mode 100644
index 0000000..42c5552
--- /dev/null
+++ b/spec/rails-3.2/Gemfile.lock
@@ -0,0 +1,126 @@
+PATH
+  remote: ../..
+  specs:
+    assignable_values (0.5.1)
+      activerecord
+
+GEM
+  remote: http://rubygems.org/
+  specs:
+    actionmailer (3.2.9)
+      actionpack (= 3.2.9)
+      mail (~> 2.4.4)
+    actionpack (3.2.9)
+      activemodel (= 3.2.9)
+      activesupport (= 3.2.9)
+      builder (~> 3.0.0)
+      erubis (~> 2.7.0)
+      journey (~> 1.0.4)
+      rack (~> 1.4.0)
+      rack-cache (~> 1.2)
+      rack-test (~> 0.6.1)
+      sprockets (~> 2.2.1)
+    activemodel (3.2.9)
+      activesupport (= 3.2.9)
+      builder (~> 3.0.0)
+    activerecord (3.2.9)
+      activemodel (= 3.2.9)
+      activesupport (= 3.2.9)
+      arel (~> 3.0.2)
+      tzinfo (~> 0.3.29)
+    activeresource (3.2.9)
+      activemodel (= 3.2.9)
+      activesupport (= 3.2.9)
+    activesupport (3.2.9)
+      i18n (~> 0.6)
+      multi_json (~> 1.0)
+    arel (3.0.2)
+    builder (3.0.4)
+    columnize (0.3.6)
+    diff-lcs (1.1.3)
+    erubis (2.7.0)
+    hike (1.2.1)
+    i18n (0.6.1)
+    journey (1.0.4)
+    json (1.7.5)
+    linecache (0.46)
+      rbx-require-relative (> 0.0.4)
+    mail (2.4.4)
+      i18n (>= 0.4.0)
+      mime-types (~> 1.16)
+      treetop (~> 1.4.8)
+    mime-types (1.19)
+    multi_json (1.3.7)
+    polyglot (0.3.3)
+    rack (1.4.1)
+    rack-cache (1.2)
+      rack (>= 0.4)
+    rack-ssl (1.3.2)
+      rack
+    rack-test (0.6.2)
+      rack (>= 1.0)
+    rails (3.2.9)
+      actionmailer (= 3.2.9)
+      actionpack (= 3.2.9)
+      activerecord (= 3.2.9)
+      activeresource (= 3.2.9)
+      activesupport (= 3.2.9)
+      bundler (~> 1.0)
+      railties (= 3.2.9)
+    railties (3.2.9)
+      actionpack (= 3.2.9)
+      activesupport (= 3.2.9)
+      rack-ssl (~> 1.3.2)
+      rake (>= 0.8.7)
+      rdoc (~> 3.4)
+      thor (>= 0.14.6, < 2.0)
+    rake (10.0.2)
+    rbx-require-relative (0.0.9)
+    rdoc (3.12)
+      json (~> 1.4)
+    rspec (2.12.0)
+      rspec-core (~> 2.12.0)
+      rspec-expectations (~> 2.12.0)
+      rspec-mocks (~> 2.12.0)
+    rspec-core (2.12.0)
+    rspec-expectations (2.12.0)
+      diff-lcs (~> 1.1.3)
+    rspec-mocks (2.12.0)
+    rspec-rails (2.12.0)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      railties (>= 3.0)
+      rspec-core (~> 2.12.0)
+      rspec-expectations (~> 2.12.0)
+      rspec-mocks (~> 2.12.0)
+    rspec_candy (0.2.1)
+      rspec
+    ruby-debug (0.10.4)
+      columnize (>= 0.1)
+      ruby-debug-base (~> 0.10.4.0)
+    ruby-debug-base (0.10.4)
+      linecache (>= 0.3)
+    sprockets (2.2.2)
+      hike (~> 1.2)
+      multi_json (~> 1.0)
+      rack (~> 1.0)
+      tilt (~> 1.1, != 1.3.0)
+    sqlite3 (1.3.6)
+    thor (0.16.0)
+    tilt (1.3.3)
+    treetop (1.4.12)
+      polyglot
+      polyglot (>= 0.3.1)
+    tzinfo (0.3.35)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  assignable_values!
+  rails (~> 3.2)
+  rspec
+  rspec-rails
+  rspec_candy
+  ruby-debug
+  sqlite3