diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index 1020aab127..2facc37fa2 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -576,7 +576,9 @@ class WP_Comments_List_Table extends WP_List_Table {
 	 * @param WP_Comment $comment     The comment object.
 	 * @param string     $column_name Current column name.
 	 * @param string     $primary     Primary column name.
-	 * @return string|void Comment row actions output.
+	 * @return string Row actions output for comments. An empty string
+	 *                if the current column is not the primary column,
+	 *                or if the current user cannot edit the comment.
 	 */
 	protected function handle_row_actions( $comment, $column_name, $primary ) {
 		global $comment_status;
@@ -586,7 +588,7 @@ class WP_Comments_List_Table extends WP_List_Table {
 		}
 
 		if ( ! $this->user_can ) {
-			return;
+			return '';
 		}
 
 		$the_comment_status = wp_get_comment_status( $comment );
diff --git a/src/wp-admin/includes/class-wp-links-list-table.php b/src/wp-admin/includes/class-wp-links-list-table.php
index b0aab333e0..8cec81e540 100644
--- a/src/wp-admin/includes/class-wp-links-list-table.php
+++ b/src/wp-admin/includes/class-wp-links-list-table.php
@@ -314,7 +314,8 @@ class WP_Links_List_Table extends WP_List_Table {
 	 * @param object $link        Link being acted upon.
 	 * @param string $column_name Current column name.
 	 * @param string $primary     Primary column name.
-	 * @return string Row action output for links.
+	 * @return string Row actions output for links, or an empty string
+	 *                if the current column is not the primary column.
 	 */
 	protected function handle_row_actions( $link, $column_name, $primary ) {
 		if ( $primary !== $column_name ) {
diff --git a/src/wp-admin/includes/class-wp-media-list-table.php b/src/wp-admin/includes/class-wp-media-list-table.php
index b76c92072d..f0f3ca8a37 100644
--- a/src/wp-admin/includes/class-wp-media-list-table.php
+++ b/src/wp-admin/includes/class-wp-media-list-table.php
@@ -781,7 +781,8 @@ class WP_Media_List_Table extends WP_List_Table {
 	 * @param object $post        Attachment being acted upon.
 	 * @param string $column_name Current column name.
 	 * @param string $primary     Primary column name.
-	 * @return string Row actions output for media attachments.
+	 * @return string Row actions output for media attachments, or an empty string
+	 *                if the current column is not the primary column.
 	 */
 	protected function handle_row_actions( $post, $column_name, $primary ) {
 		if ( $primary !== $column_name ) {
@@ -789,6 +790,7 @@ class WP_Media_List_Table extends WP_List_Table {
 		}
 
 		$att_title = _draft_or_post_title();
+
 		return $this->row_actions( $this->_get_row_actions( $post, $att_title ) );
 	}
 }
diff --git a/src/wp-admin/includes/class-wp-ms-sites-list-table.php b/src/wp-admin/includes/class-wp-ms-sites-list-table.php
index 34fbad2c68..35b47245cc 100644
--- a/src/wp-admin/includes/class-wp-ms-sites-list-table.php
+++ b/src/wp-admin/includes/class-wp-ms-sites-list-table.php
@@ -666,11 +666,12 @@ class WP_MS_Sites_List_Table extends WP_List_Table {
 	 * @param object $blog        Site being acted upon.
 	 * @param string $column_name Current column name.
 	 * @param string $primary     Primary column name.
-	 * @return string Row actions output.
+	 * @return string Row actions output for sites in Multisite, or an empty string
+	 *                if the current column is not the primary column.
 	 */
 	protected function handle_row_actions( $blog, $column_name, $primary ) {
 		if ( $primary !== $column_name ) {
-			return;
+			return '';
 		}
 
 		$blogname = untrailingslashit( $blog['domain'] . $blog['path'] );
@@ -733,6 +734,7 @@ class WP_MS_Sites_List_Table extends WP_List_Table {
 		 *                           or subdirectory multisite installation.
 		 */
 		$actions = apply_filters( 'manage_sites_action_links', array_filter( $actions ), $blog['blog_id'], $blogname );
+
 		return $this->row_actions( $actions );
 	}
 }
diff --git a/src/wp-admin/includes/class-wp-ms-users-list-table.php b/src/wp-admin/includes/class-wp-ms-users-list-table.php
index 707b9974f9..b6e21e05f3 100644
--- a/src/wp-admin/includes/class-wp-ms-users-list-table.php
+++ b/src/wp-admin/includes/class-wp-ms-users-list-table.php
@@ -488,7 +488,8 @@ class WP_MS_Users_List_Table extends WP_List_Table {
 	 * @param object $user        User being acted upon.
 	 * @param string $column_name Current column name.
 	 * @param string $primary     Primary column name.
-	 * @return string Row actions output for users in Multisite.
+	 * @return string Row actions output for users in Multisite, or an empty string
+	 *                if the current column is not the primary column.
 	 */
 	protected function handle_row_actions( $user, $column_name, $primary ) {
 		if ( $primary !== $column_name ) {
@@ -517,6 +518,7 @@ class WP_MS_Users_List_Table extends WP_List_Table {
 		 * @param WP_User  $user    WP_User object.
 		 */
 		$actions = apply_filters( 'ms_user_row_actions', $actions, $user );
+
 		return $this->row_actions( $actions );
 	}
 }
diff --git a/src/wp-admin/includes/class-wp-posts-list-table.php b/src/wp-admin/includes/class-wp-posts-list-table.php
index ee7750c12a..890d133889 100644
--- a/src/wp-admin/includes/class-wp-posts-list-table.php
+++ b/src/wp-admin/includes/class-wp-posts-list-table.php
@@ -1320,7 +1320,8 @@ class WP_Posts_List_Table extends WP_List_Table {
 	 * @param object $post        Post being acted upon.
 	 * @param string $column_name Current column name.
 	 * @param string $primary     Primary column name.
-	 * @return string Row actions output for posts.
+	 * @return string Row actions output for posts, or an empty string
+	 *                if the current column is not the primary column.
 	 */
 	protected function handle_row_actions( $post, $column_name, $primary ) {
 		if ( $primary !== $column_name ) {
diff --git a/src/wp-admin/includes/class-wp-terms-list-table.php b/src/wp-admin/includes/class-wp-terms-list-table.php
index 125d3366b5..1acacfc926 100644
--- a/src/wp-admin/includes/class-wp-terms-list-table.php
+++ b/src/wp-admin/includes/class-wp-terms-list-table.php
@@ -446,7 +446,8 @@ class WP_Terms_List_Table extends WP_List_Table {
 	 * @param WP_Term $tag         Tag being acted upon.
 	 * @param string  $column_name Current column name.
 	 * @param string  $primary     Primary column name.
-	 * @return string Row actions output for terms.
+	 * @return string Row actions output for terms, or an empty string
+	 *                if the current column is not the primary column.
 	 */
 	protected function handle_row_actions( $tag, $column_name, $primary ) {
 		if ( $primary !== $column_name ) {