Ticket #55078: 55078.5.diff

tests/phpunit/tests/ajax/AddTag.php

@@ -38 +38 @@
                         unset( $e );
                 }
 
+                // The response message is in the `data` property in WP 5.9.
                 $this->assertSame( $expected, (string) $this->get_xml_response_taxonomy()->response_data );
+                // The response message is in the `supplemental->notice` property in WP 6.0+.
+                $this->assertSame( $expected, (string) $this->get_xml_response_taxonomy()->supplemental->notice );
         }
 
         /**