diff --git a/src/wp-includes/meta.php b/src/wp-includes/meta.php
index 5f53c12bc3dbf..c657c6c2e7af3 100644
--- a/src/wp-includes/meta.php
+++ b/src/wp-includes/meta.php
@@ -1397,6 +1397,8 @@ function sanitize_meta( $meta_key, $meta_value, $object_type, $object_subtype =
  * @since 6.4.0 The `$revisions_enabled` argument was added to the arguments array.
  * @since 6.7.0 The `label` argument was added to the arguments array.
  *
+ * @global array $wp_meta_keys Global registry for meta keys.
+ *
  * @param string       $object_type Type of object metadata is for. Accepts 'blog', 'post', 'comment', 'term',
  *                                  'user', or any other object type with an associated meta table.
  * @param string       $meta_key    Meta key to register.
@@ -1567,6 +1569,8 @@ function register_meta( $object_type, $meta_key, $args, $deprecated = null ) {
  *
  * @since 5.5.0
  *
+ * @global array $wp_meta_keys Global registry for meta keys.
+ *
  * @param mixed  $value     Current value passed to filter.
  * @param int    $object_id ID of the object metadata is for.
  * @param string $meta_key  Metadata key.
@@ -1646,6 +1650,8 @@ function registered_meta_key_exists( $object_type, $meta_key, $object_subtype =
  * @since 4.6.0
  * @since 4.9.8 The `$object_subtype` parameter was added.
  *
+ * @global array $wp_meta_keys Global registry for meta keys.
+ *
  * @param string $object_type    Type of object metadata is for. Accepts 'blog', 'post', 'comment', 'term',
  *                               'user', or any other object type with an associated meta table.
  * @param string $meta_key       Metadata key.
@@ -1696,6 +1702,8 @@ function unregister_meta_key( $object_type, $meta_key, $object_subtype = '' ) {
  * @since 4.6.0
  * @since 4.9.8 The `$object_subtype` parameter was added.
  *
+ * @global array $wp_meta_keys Global registry for meta keys.
+ *
  * @param string $object_type    Type of object metadata is for. Accepts 'blog', 'post', 'comment', 'term',
  *                               'user', or any other object type with an associated meta table.
  * @param string $object_subtype Optional. The subtype of the object type. Default empty string.
diff --git a/tests/phpunit/includes/abstract-testcase.php b/tests/phpunit/includes/abstract-testcase.php
index d83b23ca4cf5c..2c2268b44de01 100644
--- a/tests/phpunit/includes/abstract-testcase.php
+++ b/tests/phpunit/includes/abstract-testcase.php
@@ -58,6 +58,8 @@ public static function get_called_class() {
 
 	/**
 	 * Runs the routine before setting up all tests.
+	 *
+	 * @global wpdb $wpdb WordPress database abstraction object.
 	 */
 	public static function set_up_before_class() {
 		global $wpdb;
@@ -98,6 +100,8 @@ public static function tear_down_after_class() {
 
 	/**
 	 * Runs the routine before each test is executed.
+	 *
+	 * @global WP_Rewrite $wp_rewrite WordPress rewrite rules object.
 	 */
 	public function set_up() {
 		set_time_limit( 0 );
@@ -155,6 +159,11 @@ public function wp_hash_password_options( array $options, string $algorithm ): a
 
 	/**
 	 * After a test method runs, resets any state in WordPress the test method might have changed.
+	 *
+	 * @global wpdb       $wpdb         WordPress database abstraction object.
+	 * @global WP_Query   $wp_the_query WordPress Query object.
+	 * @global WP_Query   $wp_query     WordPress Query object.
+	 * @global WP         $wp           WordPress environment object.
 	 */
 	public function tear_down() {
 		global $wpdb, $wp_the_query, $wp_query, $wp;
@@ -359,10 +368,10 @@ protected function reset__SERVER() {
 	 * Stores $wp_filter, $wp_actions, $wp_filters, and $wp_current_filter
 	 * on a class variable so they can be restored on tear_down() using _restore_hooks().
 	 *
-	 * @global array $wp_filter
-	 * @global array $wp_actions
-	 * @global array $wp_filters
-	 * @global array $wp_current_filter
+	 * @global array $wp_filter         Stores all of the filters and actions.
+	 * @global array $wp_actions        Stores the number of times each action was triggered.
+	 * @global array $wp_filters        Stores the number of times each filter was triggered.
+	 * @global array $wp_current_filter Stores the list of current filters with the current one last.
 	 */
 	protected function _backup_hooks() {
 		self::$hooks_saved['wp_filter'] = array();
@@ -382,10 +391,10 @@ protected function _backup_hooks() {
 	 * Restores the hook-related globals to their state at set_up()
 	 * so that future tests aren't affected by hooks set during this last test.
 	 *
-	 * @global array $wp_filter
-	 * @global array $wp_actions
-	 * @global array $wp_filters
-	 * @global array $wp_current_filter
+	 * @global array $wp_filter         Stores all of the filters and actions.
+	 * @global array $wp_actions        Stores the number of times each action was triggered.
+	 * @global array $wp_filters        Stores the number of times each filter was triggered.
+	 * @global array $wp_current_filter Stores the list of current filters with the current one last.
 	 */
 	protected function _restore_hooks() {
 		if ( isset( self::$hooks_saved['wp_filter'] ) ) {
@@ -407,6 +416,8 @@ protected function _restore_hooks() {
 
 	/**
 	 * Flushes the WordPress object cache.
+	 *
+	 * @global WP_Object_Cache $wp_object_cache WordPress Object Cache object.
 	 */
 	public static function flush_cache() {
 		global $wp_object_cache;
@@ -452,7 +463,7 @@ public static function flush_cache() {
 	 *
 	 * @since 5.1.0
 	 *
-	 * @global array $wp_meta_keys
+	 * @global array $wp_meta_keys Global registry for meta keys.
 	 */
 	public function unregister_all_meta_keys() {
 		global $wp_meta_keys;
@@ -470,6 +481,8 @@ public function unregister_all_meta_keys() {
 
 	/**
 	 * Starts a database transaction.
+	 *
+	 * @global wpdb $wpdb WordPress database abstraction object.
 	 */
 	public function start_transaction() {
 		global $wpdb;
@@ -483,6 +496,8 @@ public function start_transaction() {
 	 * Commits the queries in a transaction.
 	 *
 	 * @since 4.1.0
+	 *
+	 * @global wpdb $wpdb WordPress database abstraction object.
 	 */
 	public static function commit_transaction() {
 		global $wpdb;
@@ -1133,6 +1148,8 @@ public function normalizeDirectorySeparatorsInPath( $path ) {
 	 * @since 5.3.0 Formalized the existing `...$prop` parameter by adding it
 	 *              to the function signature.
 	 *
+	 * @global WP_Query $wp_query WordPress Query object.
+	 *
 	 * @param string ...$prop Any number of WP_Query properties that are expected to be true for the current request.
 	 */
 	public function assertQueryTrue( ...$prop ) {
@@ -1632,7 +1649,7 @@ public static function delete_user( $user_id ) {
 	 *
 	 * @since 4.4.0
 	 *
-	 * @global WP_Rewrite $wp_rewrite
+	 * @global WP_Rewrite $wp_rewrite WordPress rewrite rules object.
 	 *
 	 * @param string $structure Optional. Permalink structure to set. Default empty.
 	 */