diff --git a/.rubocop.yml b/.rubocop.yml
index 9232ccd..2dc853f 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,6 +2,9 @@ require: 'rubocop-cask'
 
 AllCops:
   TargetRubyVersion: 2.0
+  Exclude:
+    - 'Casks/**/*.rb'
+    - 'Formula/**/*.rb'
 
 Metrics/AbcSize:
   Enabled: false
@@ -20,10 +23,6 @@ Metrics/PerceivedComplexity:
 
 Metrics/ModuleLength:
   CountComments: false
-  Exclude:
-    - 'lib/hbc/locations.rb'
-    - 'lib/hbc/macos.rb'
-    - 'lib/hbc/utils.rb'
 
 Style/ClassAndModuleChildren:
   EnforcedStyle: compact
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..b8d52f5
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,41 @@
+language: ruby
+
+sudo: false
+
+env:
+  global:
+    - LANG=en_US.UTF-8
+    - LANGUAGE=en_US.UTF-8
+    - LC_ALL=en_US.UTF-8
+
+matrix:
+  include:
+    - env: OSX=10.11 HOMEBREW_RUBY=2.0.0
+      os: osx
+      osx_image: xcode7.3
+      rvm: system
+    - env: OSX=10.10 HOMEBREW_RUBY=2.0.0
+      os: osx
+      osx_image: xcode7.1
+      rvm: system
+  fast_finish: true
+
+branches:
+  only:
+    - master
+
+cache:
+  directories:
+    - $HOME/.gem
+
+before_install:
+  - . ci/travis/before_install.sh
+
+install:
+  - . ci/travis/install.sh
+
+before_script:
+  - . ci/travis/before_script.sh
+
+script:
+  - . ci/travis/script.sh
diff --git a/Casks/.rubocop.yml b/Casks/.rubocop.yml
deleted file mode 100644
index 90d78bc..0000000
--- a/Casks/.rubocop.yml
+++ /dev/null
@@ -1 +0,0 @@
-require: rubocop-cask
diff --git a/Gemfile b/Gemfile
old mode 100644
new mode 100755
diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100644
new mode 100755
index 913838f..f407fc0
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,19 +14,19 @@ GEM
     powerpack (0.1.1)
     public_suffix (2.0.2)
     rainbow (2.1.0)
-    rake (11.2.2)
+    rake (10.0.4)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)
       rspec-mocks (~> 3.0.0)
-    rspec-core (3.0.4)
+    rspec-core (3.0.2)
       rspec-support (~> 3.0.0)
-    rspec-expectations (3.0.4)
+    rspec-expectations (3.0.2)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.0.0)
-    rspec-mocks (3.0.4)
+    rspec-mocks (3.0.2)
       rspec-support (~> 3.0.0)
-    rspec-support (3.0.4)
+    rspec-support (3.0.2)
     rubocop (0.41.2)
       parser (>= 2.3.1.1, < 3.0)
       powerpack (~> 0.1)
diff --git a/readme.md b/README.md
similarity index 100%
rename from readme.md
rename to README.md
diff --git a/Rakefile b/Rakefile
old mode 100644
new mode 100755
index d72046d..a30bc15
--- a/Rakefile
+++ b/Rakefile
@@ -1,13 +1,8 @@
 require "rake/testtask"
-require "rubocop/rake_task"
 
 Rake::TestTask.new do |t|
   t.pattern = "test/**/*_test.rb"
   t.libs << "test"
 end
 
-RuboCop::RakeTask.new(:rubocop) do |t|
-  t.options = ["--force-exclusion"]
-end
-
-task default: [:test, :rubocop]
+task default: :test
diff --git a/ci/travis/README.md b/ci/travis/README.md
new file mode 100755
index 0000000..9c1050b
--- /dev/null
+++ b/ci/travis/README.md
@@ -0,0 +1,5 @@
+## Travis-CI Scripts
+
+The bash scripts in this directory are run only in Travis-CI, and are placed here to help simplify the [`.travis.yml`](../../.travis.yml) configuration file.
+
+These scripts are not meant to be run locally by users or developers of Homebrew-Cask.
diff --git a/ci/travis/before_install.sh b/ci/travis/before_install.sh
new file mode 100755
index 0000000..69fc05c
--- /dev/null
+++ b/ci/travis/before_install.sh
@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+#
+# before_install.sh
+#
+# This file is meant to be sourced during the `before_install` phase of the
+# Travis build. Do not attempt to source or run it locally.
+#
+# shellcheck disable=SC1090
+. "${TRAVIS_BUILD_DIR}/ci/travis/helpers.sh"
+
+header 'Running before_install.sh...'
+
+# https://github.com/rvm/rvm/pull/3627
+run rvm get head
+
+# unset rvm hook functions
+run unset -f cd gem
+
+# print all travis-defined environment variables
+run 'env | sort'
+
+# see https://github.com/travis-ci/travis-ci/issues/2666
+run export BRANCH_COMMIT="${TRAVIS_COMMIT_RANGE##*.}"
+run export TARGET_COMMIT="${TRAVIS_COMMIT_RANGE%%.*}"
+# shellcheck disable=SC2016
+if ! run 'MERGE_BASE="$(git merge-base "${BRANCH_COMMIT}" "${TARGET_COMMIT}")"'; then
+  run git fetch --unshallow
+  run 'MERGE_BASE="$(git merge-base "${BRANCH_COMMIT}" "${TARGET_COMMIT}")"'
+fi
+run export MERGE_BASE="${MERGE_BASE}"
+run export TRAVIS_COMMIT_RANGE="${MERGE_BASE}...${BRANCH_COMMIT}"
+
+# print detailed macOS version info
+run sw_vers
+
+# capture system ruby and gem locations
+run export SYSTEM_RUBY_HOME="/System/Library/Frameworks/Ruby.framework/Versions/${HOMEBREW_RUBY%.*}"
+run export SYSTEM_RUBY_BINDIR="${SYSTEM_RUBY_HOME}/usr/bin"
+run export SYSTEM_GEM_HOME="${SYSTEM_RUBY_HOME}/usr/lib/ruby/gems/${HOMEBREW_RUBY}"
+run export SYSTEM_GEM_BINDIR="${SYSTEM_GEM_HOME}/bin"
+
+# capture user gem locations
+run export GEM_HOME="$HOME/.gem/ruby/${HOMEBREW_RUBY}"
+run export GEM_BINDIR="${GEM_HOME}/bin"
+
+# ensure that the gems we install are used before system gems
+run export GEM_PATH="${GEM_HOME}:${SYSTEM_GEM_HOME}"
+run export PATH="${GEM_BINDIR}:${SYSTEM_GEM_BINDIR}:${SYSTEM_RUBY_BINDIR}:$PATH"
+
+# ensure that brew uses the ruby we want it to
+run export HOMEBREW_RUBY_PATH="${SYSTEM_RUBY_BINDIR}/ruby"
+
+run which ruby
+run ruby --version
+
+run which gem
+run gem --version
+
+run brew update
+
+# ensure that we are the only brew-cask available
+run brew uninstall --force brew-cask
+
+# mirror the repo as a tap, then run the build from there
+run export CASK_TAP_DIR='/usr/local/Library/Taps/reitermarkus/homebrew-tap'
+run mkdir -p "${CASK_TAP_DIR}"
+run rsync -az --delete "${TRAVIS_BUILD_DIR}/" "${CASK_TAP_DIR}/"
+run export TRAVIS_BUILD_DIR="${CASK_TAP_DIR}"
+run cd "${CASK_TAP_DIR}" || exit 1
diff --git a/ci/travis/before_script.sh b/ci/travis/before_script.sh
new file mode 100755
index 0000000..e84c1b0
--- /dev/null
+++ b/ci/travis/before_script.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# before_script.sh
+#
+# This file is meant to be sourced during the `before_script` phase of the
+# Travis build. Do not attempt to source or run it locally.
+#
+# shellcheck disable=SC1090
+. "${TRAVIS_BUILD_DIR}/ci/travis/helpers.sh"
+
+header 'Running before_script.sh...'
+
+run which bundle
+run bundle --version
+
+run which rake
+run rake --version
diff --git a/ci/travis/helpers.sh b/ci/travis/helpers.sh
new file mode 100755
index 0000000..d5091c5
--- /dev/null
+++ b/ci/travis/helpers.sh
@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+#
+# helpers.sh
+#
+# Helper functions for Travis build scripts.
+#
+
+# force strict error checking
+set -o errexit
+set -o pipefail
+
+# enable extended globbing syntax
+shopt -s extglob
+
+CYAN='\033[0;36m'
+MAGENTA='\033[1;35m'
+NC='\033[0m' # no color
+
+# log command before running and add a blank line
+run () {
+  echo -e "${MAGENTA}>>>${NC} $*"
+  eval "$*"
+  local retval=$?
+  echo
+  return $retval
+}
+
+# print args as a cyan header
+header () {
+  echo
+  echo -e "${CYAN}$*${NC}"
+  echo
+}
+
+modified_cask_files () {
+  if [[ -z "${MODIFIED_CASK_FILES+defined}" ]]; then
+    MODIFIED_CASK_FILES="$(git diff --name-only --diff-filter=AM "${TRAVIS_COMMIT_RANGE}" -- Casks/*.rb)"
+    export MODIFIED_CASK_FILES
+  fi
+  echo "${MODIFIED_CASK_FILES}"
+}
+
+modified_files_outside_casks () {
+  if [[ -z "${MODIFIED_FILES_OUTSIDE_CASKS+defined}" ]]; then
+    MODIFIED_FILES_OUTSIDE_CASKS="$(git diff --name-only "${TRAVIS_COMMIT_RANGE}" -- !(Casks))"
+    export MODIFIED_FILES_OUTSIDE_CASKS
+  fi
+  echo "${MODIFIED_FILES_OUTSIDE_CASKS}"
+}
+
+any_casks_modified () {
+  [[ -n "$(modified_cask_files)" ]]
+}
+
+must_run_tests () {
+  [[ -n "$(modified_files_outside_casks)" ]]
+}
diff --git a/ci/travis/install.sh b/ci/travis/install.sh
new file mode 100755
index 0000000..07404e5
--- /dev/null
+++ b/ci/travis/install.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# install.sh
+#
+# This file is meant to be sourced during the `install` phase of the Travis
+# build. Do not attempt to source or run it locally.
+#
+# shellcheck disable=SC1090
+. "${TRAVIS_BUILD_DIR}/ci/travis/helpers.sh"
+
+header 'Running install.sh...'
+
+# install bundler and project dependencies in $GEM_HOME
+run gem install --no-ri --no-rdoc bundler
+run which bundle
+run bundle --version
+run bundle install --path="${GEM_HOME%/*/*}"
diff --git a/ci/travis/script.sh b/ci/travis/script.sh
new file mode 100755
index 0000000..f6c10a8
--- /dev/null
+++ b/ci/travis/script.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# script.sh
+#
+# This file is meant to be sourced during the `script` phase of the Travis
+# build. Do not attempt to source or run it locally.
+#
+# shellcheck disable=SC1090
+. "${TRAVIS_BUILD_DIR}/ci/travis/helpers.sh"
+
+header 'Running script.sh...'
+
+if any_casks_modified; then
+  modified_casks=($(modified_cask_files))
+  run brew cask style "${modified_casks[@]}"
+fi
+
+if must_run_tests; then
+  run bundle exec rubocop
+  run bundle exec rake test
+fi
diff --git a/test/Casks/compliance_test.rb b/test/Casks/compliance_test.rb
new file mode 100755
index 0000000..3512249
--- /dev/null
+++ b/test/Casks/compliance_test.rb
@@ -0,0 +1,14 @@
+require "test_helper"
+
+describe "Casks" do
+  Hbc.all.each do |cask|
+    describe cask.to_s do
+      it "passes audit" do
+        audit = Hbc::Audit.new(cask)
+        audit.run!
+        audit.errors.must_equal [], "[#{cask}] Cask audit must be error free"
+        audit.warnings.must_equal [], "[#{cask}] Cask audit must be warning free"
+      end
+    end
+  end
+end
diff --git a/test/layout_test.rb b/test/layout_test.rb
new file mode 100755
index 0000000..c1f92b5
--- /dev/null
+++ b/test/layout_test.rb
@@ -0,0 +1,79 @@
+require "test_helper"
+
+describe "Repo layout" do
+  project_root = Pathname.new(File.expand_path("#{File.dirname(__FILE__)}/../"))
+
+  # TODO: a more clever way to do this would be to dispense with
+  #       the imperfect IGNORE lists and read the actual repo
+  #       contents by reading the output of "git ls-files"
+
+  # dot dirs are always a project of Dir.entries
+  # other files are items that the developer hopefully has gitignored
+  IGNORE_FILES = %w[
+                   .
+                   ..
+                   .DS_Store
+                   .bundle
+                 ].freeze
+
+  # the developer has hopefully gitignored these
+  IGNORE_REGEXPS = [
+                     %r{~$}, # emacs
+                   ].freeze
+
+  TOPLEVEL_DIRS = %w[
+                    .git
+                    .github
+                    Casks
+                    ci
+                    Formula
+                    developer
+                    spec
+                    test
+                  ].freeze
+
+  TOPLEVEL_FILES = %w[
+                     .gitignore
+                     .gitattributes
+                     .rspec
+                     .rubocop.yml
+                     .travis.yml
+                     CONTRIBUTING.md
+                     Gemfile
+                     Gemfile.lock
+                     LICENSE
+                     README.md
+                     Rakefile
+                   ].freeze
+
+  describe "toplevel dir" do
+    it "finds some files at the top level" do
+      entries = Dir.entries(project_root)
+      entries.length.must_be :>, 0
+    end
+
+    it "only finds expected files at the top level" do
+      entries = Dir.entries(project_root) - IGNORE_FILES - TOPLEVEL_DIRS - TOPLEVEL_FILES
+      IGNORE_REGEXPS.each do |regexp|
+        entries.reject! { |elt| elt.match(regexp) }
+      end
+      entries.must_equal []
+    end
+  end
+
+  describe "Casks dir" do
+    it "finds some files in the Casks dir" do
+      entries = Dir.entries(project_root.join("Casks"))
+      entries.length.must_be :>, 0
+    end
+
+    it "only finds .rb files in the Casks dir" do
+      entries = Dir.entries(project_root.join("Casks")) - IGNORE_FILES
+      IGNORE_REGEXPS.each do |regexp|
+        entries.reject! { |elt| elt.match(regexp) }
+      end
+      entries.reject! { |elt| elt.match(%r{\.rb$}) }
+      entries.must_equal []
+    end
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
new file mode 100755
index 0000000..173c4ae
--- /dev/null
+++ b/test/test_helper.rb
@@ -0,0 +1,35 @@
+require "bundler"
+require "bundler/setup"
+
+# just in case
+raise "brew-cask: Ruby 2.0 or greater is required." if RUBY_VERSION.to_i < 2
+
+homebrew_path = Pathname(`brew --prefix`.chomp)
+homebrew_path = Pathname("/usr/local") unless homebrew_path.exist?
+
+# add homebrew-cask lib to load path
+brew_cask_path = homebrew_path.join("Library", "Taps", "caskroom", "homebrew-cask")
+lib_path = brew_cask_path.join("lib")
+$LOAD_PATH.push(lib_path)
+
+# require homebrew testing env
+# todo: removeme, this is transitional
+require "vendor/homebrew-fork/testing_env"
+
+# must be called after testing_env so at_exit hooks are in proper order
+require "minitest/autorun"
+# todo, re-enable minitest-colorize, broken under current test environment for unknown reasons
+# require 'minitest-colorize'
+
+# our baby
+require "hbc"
+
+# pretend like we installed the cask tap
+project_root = Pathname.new(File.expand_path("#{File.dirname(__FILE__)}/../"))
+taps_dest = Hbc.homebrew_prefix.join(*%w[Library Taps caskroom])
+
+# create directories
+FileUtils.mkdir_p taps_dest
+FileUtils.mkdir_p Hbc.homebrew_prefix.join("bin")
+
+FileUtils.ln_s project_root, taps_dest.join("homebrew-cask")