load_tests

# File railties/lib/rails/test_unit/runner.rb, line 44
        def load_tests(argv)
          patterns = extract_filters(argv)

          tests = Rake::FileList[patterns.any? ? patterns : "test/**/*_test.rb"]
          tests.exclude("test/system/**/*") if patterns.empty?

          tests.to_a.each { |path| require File.expand_path(path) }
        end