diff --git a/features/comment.feature b/features/comment.feature
index 6fcbd88d4d..b0058297eb 100644
--- a/features/comment.feature
+++ b/features/comment.feature
@@ -249,3 +249,22 @@ Feature: Manage WordPress comments
       """
       0
       """
+
+  Scenario: Make sure WordPress receives the slashed data it expects
+    When I run `wp comment create --comment_content='My\Comment' --porcelain`
+    Then save STDOUT as {COMMENT_ID}
+
+    When I run `wp comment get {COMMENT_ID} --field=comment_content`
+    Then STDOUT should be:
+      """
+      My\Comment
+      """
+
+    When I run `wp comment update {COMMENT_ID} --comment_content='My\New\Comment'`
+    Then STDOUT should not be empty
+
+    When I run `wp comment get {COMMENT_ID} --field=comment_content`
+    Then STDOUT should be:
+      """
+      My\New\Comment
+      """
diff --git a/php/commands/comment.php b/php/commands/comment.php
index 56b1ad0b77..c153104a9e 100644
--- a/php/commands/comment.php
+++ b/php/commands/comment.php
@@ -58,6 +58,7 @@ public function __construct() {
 	 *     Success: Created comment 932.
 	 */
 	public function create( $args, $assoc_args ) {
+		$assoc_args = wp_slash( $assoc_args );
 		parent::_create( $args, $assoc_args, function ( $params ) {
 			if ( isset( $params['comment_post_ID'] ) ) {
 				$post_id = $params['comment_post_ID'];
@@ -96,6 +97,7 @@ public function create( $args, $assoc_args ) {
 	 *     Success: Updated comment 123.
 	 */
 	public function update( $args, $assoc_args ) {
+		$assoc_args = wp_slash( $assoc_args );
 		parent::_update( $args, $assoc_args, function ( $params ) {
 			if ( !wp_update_comment( $params ) ) {
 				return new WP_Error( 'Could not update comment.' );