code: public function paintHeader($test_name)
          {
              $this->sendNoCacheHeaders();
              echo sprintf(
                  SIMPLETEST_WEBUNIT_HEAD, $test_name, $this->path . 'js/', $this->path . 'js/', $this->path . 'css/', $this->_getCss(), $test_name, $this->path . 'img/'
                  );
              flush();
          }
docs: Paints the top of the web page setting the title to the name of the starting test.
  
  @param string $test_name      Name class of test.