Enable @backupGlobals for method while disabled for class

[Stadly]

Q	A
PHPUnit version	7.1.1
PHP version	7.1.11
Installation Method	Composer

It seems that @backupGlobals cannot be enabled for methods if it is disabled for the class. Consider the following test class.

/**
 * @backupGlobals disabled
 */
class Test extends \PHPUnit\Framework\TestCase {

    /**
     * @backupGlobals enabled
     */
    public function test1() {
        $GLOBALS['foo'] = 'bar';
        self::assertTrue(true);
    }

    public function test2() {
        self::assertFalse(isset($GLOBALS['foo']));
    }
}

Expected result: Both tests pass.
Actual result:

Test::test2()
Failed asserting that true is false.

If @backupGlobals is not disabled for the class by using the annotation, but just because it is disabled by default, both tests pass.

[Stadly]

The same issue occurs when @backupGlobals is enabled for the class, but disabled for a method:

/**
* @backupGlobals enabled
*/
class Test extends TestCase {

   /**
    * @backupGlobals disabled
    */
   public function test1() {
       $GLOBALS['foo'] = 'bar';
       self::assertTrue(true);
   }

   public function test2() {
       self::assertTrue(isset($GLOBALS['foo']));
   }
}

Expected result: Both tests pass.
Actual result:

Test::test2()
Failed asserting that false is true.