diff --git a/Rakefile b/Rakefile
index 0e465504..19fa97aa 100644
--- a/Rakefile
+++ b/Rakefile
@@ -19,3 +19,10 @@ Rake::TestTask.new do |t|
   t.verbose = true
 end
 task default: :test
+
+Rake::TestTask.new(:spec) do |t|
+  t.libs << 'lib' << 'test'
+  t.ruby_opts = %w[-rtest_helper]
+  t.test_files = %w[test/haml-spec/ugly_test.rb test/haml-spec/pretty_test.rb]
+  t.verbose = true
+end
diff --git a/test/haml-spec/pretty_test.rb b/test/haml-spec/pretty_test.rb
index 68dd4491..69d4c781 100644
--- a/test/haml-spec/pretty_test.rb
+++ b/test/haml-spec/pretty_test.rb
@@ -1,3 +1,5 @@
+$:.unshift File.expand_path('../../test', __dir__)
+
 require 'test_helper'
 require 'minitest/autorun'
 
diff --git a/test/haml-spec/ugly_test.rb b/test/haml-spec/ugly_test.rb
index 7b5ef6c3..1ee7dbe9 100644
--- a/test/haml-spec/ugly_test.rb
+++ b/test/haml-spec/ugly_test.rb
@@ -1,3 +1,5 @@
+$:.unshift File.expand_path('../../test', __dir__)
+
 require 'test_helper'
 require 'minitest/autorun'