diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..0fbebed
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,5 @@
+Metrics/AbcSize:
+  Enabled: false
+
+Metrics/BlockLength:
+  Enabled: false
diff --git a/.travis.yml b/.travis.yml
index 6e90e83..2b5bdb7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,13 +6,47 @@ branches:
   - master
 
 language: ruby
-cache: bundler
+
+env:
+  HOMEBREW_NO_INSTALL_CLEANUP=1
+  HOMEBREW_NO_AUTO_UPDATE=1
+  PYTHON_VERSION=3.8.1
+
+cache:
+  bundler: true
+  pip: true
+  directories:
+    - $HOME/.rvm
+    - $HOME/Library/Caches/Homebrew # https://stackoverflow.com/questions/39930171/cache-brew-builds-with-travis-ci
+    - /usr/local/Homebrew
+    - $HOME/.cache/pip
+    - $HOME/.cache/pyenv
+
 rvm:
   - '2.7.0'
 
 before_install:
   - gem install bundler
-  - HOMEBREW_NO_INSTALL_CLEANUP=1 HOMEBREW_NO_AUTO_UPDATE=1 brew install macvim
+  - gem install rubocop
+  - brew install macvim
+
+install:
+  - |
+    which pyenv
+    whereis pyenv
+    eval "$(pyenv init -)"
+    pyenv install --skip-existing "$PYTHON_VERSION"
+    pyenv global "$PYTHON_VERSION"
+    pyenv shell "$PYTHON_VERSION"
+    pyenv local "$PYTHON_VERSION"
+    pyenv rehash
+    pip3 --version
+    pip3 install vim-vint
+
+    bundle install
+
 
 script:
+  - vint -s --enable-neovim plugin/*.vim
+  - rubocop
   - bundle exec rspec --format documentation
diff --git a/Gemfile b/Gemfile
index ecd554f..0e38c42 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 group :test do
diff --git a/Rakefile b/Rakefile
index 86f263e..cffdd09 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,6 +1,7 @@
+# frozen_string_literal: true
+
 require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :default => :spec
-
+task default: :spec
diff --git a/spec/filetypes_spec.rb b/spec/filetypes_spec.rb
index 7d87609..ac3fcf0 100644
--- a/spec/filetypes_spec.rb
+++ b/spec/filetypes_spec.rb
@@ -26,18 +26,17 @@
     # filetype to something that isn't text or markdown,
     # the rest of the tests are gonna fail.
     filename = "#{SecureRandom.hex(6)}.txt"
-    write_file(filename, "")
+    write_file(filename, '')
 
     vim.edit filename
     vim.type 'i'
     vim.feedkeys '\\<c-r>'
-    vim.type "=&filetype"
+    vim.type '=&filetype'
     vim.feedkeys '\\<cr>'
     vim.write
 
     file_contents = normalize_string_indent(IO.read(filename)).strip
 
-    expect(["markdown", "text"]).to include(file_contents)
+    expect(%w[markdown text]).to include(file_contents)
   end
-
 end