diff --git a/.travis.yml b/.travis.yml
index 4c97c19c..9d808220 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ gemfile:
   - gemfiles/rails_4.1.0.gemfile
   - gemfiles/rails_4.2.0.gemfile
   - gemfiles/rails_5.0.0.gemfile
+  - gemfiles/rails_5.1.1.gemfile
 rvm:
   - 2.3.0
 before_install:
diff --git a/Appraisals b/Appraisals
index 3da841e6..41f6df94 100644
--- a/Appraisals
+++ b/Appraisals
@@ -13,7 +13,10 @@ appraise "rails-4.2.0" do
   gem "listen", "< 3.1.0"
 end
 
-
 appraise "rails-5.0.0" do
   gem "rails", "5.0.0"
 end
+
+appraise "rails-5.1.1" do
+  gem "rails", "5.1.1"
+end
diff --git a/Gemfile b/Gemfile
index 519088c8..8ceb81fd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,4 +14,6 @@ gem 'appraisal'
 gem 'tzinfo'
 gem 'pry'
 gem 'simplecov'
-gem 'simplecov-summary'
\ No newline at end of file
+gem 'simplecov-summary'
+
+gem 'minitest', '<5.10.0'
diff --git a/gemfiles/rails_4.0.0.gemfile b/gemfiles/rails_4.0.0.gemfile
index b0be367b..96de1563 100644
--- a/gemfiles/rails_4.0.0.gemfile
+++ b/gemfiles/rails_4.0.0.gemfile
@@ -14,7 +14,8 @@ gem "tzinfo"
 gem "pry"
 gem "simplecov"
 gem "simplecov-summary"
+gem "minitest", "<5.10.0"
 gem "rails", "4.0.0"
 gem "listen", "< 3.1.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rails_4.1.0.gemfile b/gemfiles/rails_4.1.0.gemfile
index 2ab74511..170f6cf7 100644
--- a/gemfiles/rails_4.1.0.gemfile
+++ b/gemfiles/rails_4.1.0.gemfile
@@ -14,7 +14,8 @@ gem "tzinfo"
 gem "pry"
 gem "simplecov"
 gem "simplecov-summary"
+gem "minitest", "<5.10.0"
 gem "rails", "4.1.0"
 gem "listen", "< 3.1.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rails_4.2.0.gemfile b/gemfiles/rails_4.2.0.gemfile
index 4b012b6f..0650b557 100644
--- a/gemfiles/rails_4.2.0.gemfile
+++ b/gemfiles/rails_4.2.0.gemfile
@@ -14,7 +14,8 @@ gem "tzinfo"
 gem "pry"
 gem "simplecov"
 gem "simplecov-summary"
+gem "minitest", "<5.10.0"
 gem "rails", "4.2.0"
 gem "listen", "< 3.1.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rails_5.0.0.gemfile b/gemfiles/rails_5.0.0.gemfile
index fa96fd53..0170e4f6 100644
--- a/gemfiles/rails_5.0.0.gemfile
+++ b/gemfiles/rails_5.0.0.gemfile
@@ -14,6 +14,7 @@ gem "tzinfo"
 gem "pry"
 gem "simplecov"
 gem "simplecov-summary"
+gem "minitest", "<5.10.0"
 gem "rails", "5.0.0"
 
-gemspec :path => "../"
+gemspec path: "../"
diff --git a/gemfiles/rails_5.1.1.gemfile b/gemfiles/rails_5.1.1.gemfile
new file mode 100644
index 00000000..1dc90e1e
--- /dev/null
+++ b/gemfiles/rails_5.1.1.gemfile
@@ -0,0 +1,20 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "wasabi"
+gem "savon", ">= 2.0.0"
+gem "httpi"
+gem "rspec-rails"
+gem "guard"
+gem "guard-rspec"
+gem "rb-fsevent"
+gem "appraisal"
+gem "tzinfo"
+gem "pry"
+gem "simplecov"
+gem "simplecov-summary"
+gem "rails", "5.1.1"
+gem "railties", "5.1.1"
+
+gemspec path: "../"
diff --git a/lib/wash_out/version.rb b/lib/wash_out/version.rb
index 2b82656e..f015a044 100644
--- a/lib/wash_out/version.rb
+++ b/lib/wash_out/version.rb
@@ -1,3 +1,3 @@
 module WashOut
-  VERSION = "0.11.0"
+  VERSION = "0.12.0"
 end