diff --git a/test/test_helper.rb b/test/test_helper.rb
index 98a7d0f39..4c7a1a577 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -49,6 +49,8 @@ class ActiveSupport::TestCase
   fixtures :all
   set_fixture_class log_domains: Version::DomainVersion
 
+  parallelize(workers: :number_of_processors)
+
   teardown do
     travel_back
   end