diff --git a/Gemfile b/Gemfile
index 3f64f64..22ddabc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'minitest'
-gem 'rake'
 gem 'coveralls', require: false
+gem 'rake'
+gem 'rspec'
 gem 'rubocop'
diff --git a/Rakefile b/Rakefile
index 7939225..cdb2149 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,11 +1,11 @@
 # encoding: utf-8
 
-require 'rake/testtask'
 require 'rubocop/rake_task'
+require 'rspec/core/rake_task'
 
-Rake::TestTask.new do |t|
-  t.libs = %w( lib test )
-  t.test_files = FileList['test/**/test_*.rb', 'test/**/*_spec.rb']
+RSpec::Core::RakeTask.new(:spec) do |t|
+  t.rspec_opts = '-r ./spec/spec_helper.rb --color'
+  t.verbose = false
 end
 
 RuboCop::RakeTask.new(:rubocop) do |task|
@@ -13,4 +13,4 @@ RuboCop::RakeTask.new(:rubocop) do |task|
   task.patterns = ['lib/**/*.rb', 'test/**/*.rb']
 end
 
-task :default => [:test, :rubocop]
+task :default => [:spec, :rubocop]
diff --git a/spec/filter_spec.rb b/spec/filter_spec.rb
new file mode 100644
index 0000000..fa2d8f2
--- /dev/null
+++ b/spec/filter_spec.rb
@@ -0,0 +1,7 @@
+describe Nanoc::Asciidoctor::Filter do
+  let(:filter) { described_class.new }
+
+  subject { filter.setup_and_run('== Blah blah') }
+
+  it { is_expected.to match(%r{<h2 id="_blah_blah">Blah blah</h2>}) }
+end
diff --git a/test/helper.rb b/spec/spec_helper.rb
similarity index 63%
rename from test/helper.rb
rename to spec/spec_helper.rb
index 04e3e54..85f4f21 100644
--- a/test/helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,5 @@
 require 'coveralls'
 Coveralls.wear!
 
-require 'minitest'
-require 'minitest/autorun'
 require 'nanoc'
 require 'nanoc-asciidoctor'
diff --git a/test/filters/test_asciidoctor.rb b/test/filters/test_asciidoctor.rb
deleted file mode 100644
index 7b03d0e..0000000
--- a/test/filters/test_asciidoctor.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-require 'helper'
-
-module Nanoc
-  module Asciidoctor
-    class FilterTest < Minitest::Test
-      def test_filter
-        filter = ::Nanoc::Asciidoctor::Filter.new
-        result = filter.setup_and_run('== Blah blah')
-        assert_match %r{<h2 id="_blah_blah">Blah blah</h2>}, result
-      end
-    end
-  end
-end