diff --git a/components/dependency_injection/parentservices.rst b/components/dependency_injection/parentservices.rst
index c1e8d9d3e4d..aad7144e35b 100644
--- a/components/dependency_injection/parentservices.rst
+++ b/components/dependency_injection/parentservices.rst
@@ -67,7 +67,7 @@ The service config for these classes would look something like this:
                     - [setEmailFormatter, ['@my_email_formatter']]
 
             greeting_card_manager:
-                class: 'GreetingCardManager'
+                class: GreetingCardManager
                 calls:
                     - [setMailer, ['@my_mailer']]
                     - [setEmailFormatter, ['@my_email_formatter']]
@@ -196,11 +196,11 @@ a parent for a service.
                     - [setEmailFormatter, ['@my_email_formatter']]
 
             newsletter_manager:
-                class:  "NewsletterManager"
+                class:  NewsletterManager
                 parent: mail_manager
 
             greeting_card_manager:
-                class:  "GreetingCardManager"
+                class:  GreetingCardManager
                 parent: mail_manager
 
     .. code-block:: xml
@@ -324,13 +324,13 @@ to the ``NewsletterManager`` class, the config would look like this:
                     - [setEmailFormatter, ['@my_email_formatter']]
 
             newsletter_manager:
-                class:  'NewsletterManager'
+                class:  NewsletterManager
                 parent: mail_manager
                 calls:
                     - [setMailer, ['@my_alternative_mailer']]
 
             greeting_card_manager:
-                class:  'GreetingCardManager'
+                class:  GreetingCardManager
                 parent: mail_manager
 
     .. code-block:: xml