diff --git a/.travis.yml b/.travis.yml
index 19932b4e..a8f407e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ rvm:
   - 2.4
   - 2.5
   - 2.6
+  - 2.7
   - ruby-head
   - jruby
 matrix:
diff --git a/Gemfile b/Gemfile
index 0369afec..559648a2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,8 +12,8 @@ group :development do
   gem 'rdoc',             Gem::Version.new(RUBY_VERSION) < Gem::Version.new('1.9.3') ? '~> 4.2.2' : Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2.2') ? '< 6' : '>= 6'
   gem 'RedCloth',         RUBY_PLATFORM == 'java' ? '= 4.2.9' : '>= 4.0.3'
   gem 'rspec',            '~> 3.9.0'
-  gem 'simplecov',        '~> 0.17.1'
   gem 'shoulda-context',  RUBY_VERSION < '1.9' ? '= 1.2.1'    : '>= 1.2.1'
+  gem 'simplecov',        '~> 0.17.1'
   gem 'term-ansicolor',   RUBY_VERSION < '2.0' ? '~> 1.3.2'   : '>= 1.3.2'
   gem 'test-unit',        RUBY_VERSION < '1.9' ? '~> 2.0'     : '>= 3.0'
   gem 'tins',             RUBY_VERSION < '2.0' ? '~> 1.6.0'   : '>= 1.6.0'
diff --git a/rake_tasks/test.rake b/rake_tasks/test.rake
index 277bd33b..e72c96b2 100644
--- a/rake_tasks/test.rake
+++ b/rake_tasks/test.rake
@@ -79,7 +79,9 @@ Please rename or remove it and run again to use the GitHub repository:
   end
 end
 
-require 'rspec/core/rake_task'
-RSpec::Core::RakeTask.new(:spec)
+if RUBY_VERSION >= '1.9'
+  require 'rspec/core/rake_task'
+  RSpec::Core::RakeTask.new(:spec)
+end
 
 task :test => %w(test:functional test:units test:exe spec)
diff --git a/spec/coderay_spec.rb b/spec/coderay_spec.rb
index 2c7b91e4..88c9aece 100644
--- a/spec/coderay_spec.rb
+++ b/spec/coderay_spec.rb
@@ -1,9 +1,35 @@
 require File.expand_path('../spec_helper', __FILE__)
 
 RSpec.describe CodeRay do
-  describe 'version' do
+  describe '::VERSION' do
     it "returns the Gem's version" do
       expect(CodeRay::VERSION).to match(/\A\d\.\d\.\d?\z/)
     end
   end
+
+  describe '.coderay_path' do
+    it 'returns an absolute file path to the given code file' do
+      base = File.expand_path('../..', __FILE__)
+      expect(CodeRay.coderay_path('file')).to eq("#{base}/lib/coderay/file")
+    end
+  end
+
+  describe '.scan' do
+    let(:code) { 'puts "Hello, World!"' }
+    let(:tokens) do
+      [
+        ['puts', :ident],
+        [' ', :space],
+        [:begin_group, :string],
+          ['"', :delimiter],
+          ['Hello, World!', :content],
+          ['"', :delimiter],
+        [:end_group, :string]
+      ].flatten
+    end
+
+    it 'returns tokens' do
+      expect(CodeRay.scan(code, :ruby).tokens).to eq(tokens)
+    end
+  end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 66f4127b..78a60b29 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,7 @@
-require 'simplecov'
-SimpleCov.start
+unless RUBY_VERSION[/^2.3/]
+  require 'simplecov'
+  SimpleCov.start
+end
 
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.