Can I reuse explicit wait from base class with Selenium WebDriver and PHPUnit?

Question

Is there a way to reuse explicit wait from base class?

My Base Class scenario:

public class BaseClassTest extends PHPUnit_Framework_TestCase 
{
    public function baseClassTest()
    {
        $driverWait = new WebDriverWait($this->webDriver, 80);
        ....
        ....
    }
}

My Test class scenario:

public class ClassTest extends BaseClassTest
{
    public function testClass()
    {
       $baseTest = parent::baseClassTest();
       $driverWait->until(expectedCondition....);
       return $baseTest 
    }
}

This is showing compile time error in My Test class, saying: undefined variable 'driverWait'. Where am I going wrong? please help!