diff --git a/.travis.yml b/.travis.yml
index 883be79..1f7923a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,8 +12,11 @@ gemfile:
   - gemfiles/rails40.gemfile
   - gemfiles/rails42.gemfile
   - gemfiles/rails50.gemfile
+  - gemfiles/rails51.gemfile
+  - gemfiles/rails_edge.gemfile
 matrix:
   fast_finish: true
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
+    - gemfile: gemfiles/rails_edge.gemfile
diff --git a/Appraisals b/Appraisals
index dbd7200..c0dfdea 100644
--- a/Appraisals
+++ b/Appraisals
@@ -27,3 +27,18 @@ appraise "rails50" do
   gem "sprockets", "< 4.0"
   gem "sass-rails", "~> 5.0"
 end
+
+appraise "rails51" do
+  gem "rails", "~> 5.1.0"
+  gem "sprockets", "< 4.0"
+  gem "sass-rails", "~> 5.0"
+end
+
+appraise "rails_edge" do
+  git 'git://github.com/rails/rails.git' do
+    gem "rails"
+  end
+
+  gem "sprockets", "< 4.0"
+  gem "sass-rails", "~> 5.0"
+end
diff --git a/gemfiles/rails51.gemfile b/gemfiles/rails51.gemfile
new file mode 100644
index 0000000..c69b35a
--- /dev/null
+++ b/gemfiles/rails51.gemfile
@@ -0,0 +1,19 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rb-fsevent", require: false
+gem "ruby_gntp", require: false
+gem "guard"
+gem "guard-test"
+gem "rails", "~> 5.1.0"
+gem "sprockets", "< 4.0"
+gem "sass-rails", "~> 5.0"
+
+group :test do
+  gem "mocha"
+  gem "appraisal"
+  gem "minitest"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_edge.gemfile b/gemfiles/rails_edge.gemfile
new file mode 100644
index 0000000..52639b5
--- /dev/null
+++ b/gemfiles/rails_edge.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+git "git://github.com/rails/rails.git" do
+  gem "rails"
+end
+
+gem "rb-fsevent", require: false
+gem "ruby_gntp", require: false
+gem "guard"
+gem "guard-test"
+gem "sprockets", "< 4.0"
+gem "sass-rails", "~> 5.0"
+
+group :test do
+  gem "mocha"
+  gem "appraisal"
+  gem "minitest"
+end
+
+gemspec path: "../"
diff --git a/test/helpers/rails_helper.rb b/test/helpers/rails_helper.rb
index e4fe0de..b22b0d2 100644
--- a/test/helpers/rails_helper.rb
+++ b/test/helpers/rails_helper.rb
@@ -4,6 +4,8 @@ module RailsHelpers
       include FileHelper
       include DebugHelper
       include CommandHelper
+        RAILS_5_2   = "5.2"
+        RAILS_5_1   = "5.1"
         RAILS_5_0   = "5.0"
         RAILS_4_2   = "4.2"
         RAILS_4_0   = "4.0"
@@ -13,6 +15,8 @@ module RailsHelpers
         WORKING_DIR = File.join(ROOT_PATH, 'rails-temp')
 
         VERSION_LOOKUP = {
+          RAILS_5_2 => %r{^5\.2\.},
+          RAILS_5_1 => %r{^5\.1\.},
           RAILS_5_0 => %r{^5\.0\.},
           RAILS_4_2 => %r{^4\.2\.},
           RAILS_4_0 => %r{^4\.0\.},
@@ -21,6 +25,8 @@ module RailsHelpers
         }
 
         GEMFILES = {
+          RAILS_5_2 => GEMFILES_DIR.join("rails_edge.gemfile").to_s,
+          RAILS_5_1 => GEMFILES_DIR.join("rails51.gemfile").to_s,
           RAILS_5_0 => GEMFILES_DIR.join("rails50.gemfile").to_s,
           RAILS_4_2 => GEMFILES_DIR.join("rails42.gemfile").to_s,
           RAILS_4_0 => GEMFILES_DIR.join("rails40.gemfile").to_s,