diff --git a/test/test_helper.rb b/test/test_helper.rb
index fab712feb..bee6fdcf9 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -42,10 +42,6 @@ CompanyRegister::Client = CompanyRegisterClientStub
 EInvoice.provider = EInvoice::Providers::TestProvider.new
 
 class ActiveSupport::TestCase
-  # Run tests in parallel with specified workers
-  cpu_count = ENV['PARALLEL_WORKERS'] || Concurrent.physical_processor_count || 1
-  parallelize(workers: cpu_count)
-
   ActiveRecord::Migration.check_pending!
   fixtures :all