@@ -1428,21 +1428,6 @@ public function go_to( $url ) {
 		$GLOBALS['wp']->main( $parts['query'] );
 	}
 
-	/**
-	 * Allows tests to be skipped on single or multisite installs by using @group annotations.
-	 *
-	 * This is a custom extension of the PHPUnit requirements handling.
-	 *
-	 * @since 3.5.0
-	 * @deprecated 5.9.0 This method has not been functional since PHPUnit 7.0.
-	 */
-	protected function checkRequirements() {
-		// For PHPUnit 5/6, as we're overloading a public PHPUnit native method in those versions.
-		if ( is_callable( 'PHPUnit\Framework\TestCase', 'checkRequirements' ) ) {
-			parent::checkRequirements();
-		}
-	}
-
 	/**
 	 * Skips the current test if there is an open Trac ticket associated with it.
 	 *