diff --git a/test/test_doctor_command.rb b/test/test_doctor_command.rb
index 43fa602c7..eb33ec85f 100644
--- a/test/test_doctor_command.rb
+++ b/test/test_doctor_command.rb
@@ -1,7 +1,7 @@
 require 'helper'
 require 'jekyll/commands/doctor'
 
-class TestDoctorCommand < Test::Unit::TestCase
+class TestDoctorCommand < JekyllUnitTest
   context 'urls only differ by case' do
     setup do
       clear_dest