diff --git a/tests/phpunit/includes/abstract-testcase.php b/tests/phpunit/includes/abstract-testcase.php
index d450955cf5..a169754c69 100644
--- a/tests/phpunit/includes/abstract-testcase.php
+++ b/tests/phpunit/includes/abstract-testcase.php
@@ -888,11 +888,54 @@ abstract class WP_UnitTestCase_Base extends PHPUnit_Adapter_TestCase {
 	 *
 	 * This is a custom extension of the PHPUnit requirements handling.
 	 *
+	 * Contains legacy code for skipping tests that are associated with an open Trac ticket.
+	 * Core tests no longer support this behaviour.
+	 *
 	 * @since 3.5.0
-	 * @deprecated 5.9.0 This method has not been functional since PHPUnit 7.0.
 	 */
 	protected function checkRequirements() {
-		return;
+		parent::checkRequirements();
+
+		$annotations = $this->getAnnotations();
+
+		$groups = array();
+		if ( ! empty( $annotations['class']['group'] ) ) {
+			$groups = array_merge( $groups, $annotations['class']['group'] );
+		}
+		if ( ! empty( $annotations['method']['group'] ) ) {
+			$groups = array_merge( $groups, $annotations['method']['group'] );
+		}
+
+		if ( ! empty( $groups ) ) {
+			if ( in_array( 'ms-required', $groups, true ) ) {
+				$this->skipWithoutMultisite();
+			}
+
+			if ( in_array( 'ms-excluded', $groups, true ) ) {
+				$this->skipWithMultisite();
+			}
+		}
+
+		// Core tests no longer check against open Trac tickets,
+		// but others using WP_UnitTestCase may do so.
+		if ( defined( 'WP_RUN_CORE_TESTS' ) && WP_RUN_CORE_TESTS ) {
+			return;
+		}
+
+		if ( WP_TESTS_FORCE_KNOWN_BUGS ) {
+			return;
+		}
+		$tickets = PHPUnit_Util_Test::getTickets( get_class( $this ), $this->getName( false ) );
+		foreach ( $tickets as $ticket ) {
+			if ( is_numeric( $ticket ) ) {
+				$this->knownWPBug( $ticket );
+			} elseif ( 0 === strpos( $ticket, 'Plugin' ) ) {
+				$ticket = substr( $ticket, 6 );
+				if ( $ticket && is_numeric( $ticket ) ) {
+					$this->knownPluginBug( $ticket );
+				}
+			}
+		}
 	}
 
 	/**
@@ -915,6 +958,7 @@ abstract class WP_UnitTestCase_Base extends PHPUnit_Adapter_TestCase {
 	 * Skips the current test if there is an open Unit Test Trac ticket associated with it.
 	 *
 	 * @since 3.5.0
+	 *
 	 * @deprecated No longer used since the Unit Test Trac was merged into the Core Trac.
 	 *
 	 * @param int $ticket_id Ticket number.