A/B test subject lines on confirmation emails

[ceciliagonzalez]

Hello,

I'm trying to A/B test subj lines on confirmation emails. Does anyone know how to structure this properly?

Here's the catch, the confirmation email has been live for about 2 weeks now. Trigger campaign is anyone who fills out the form will receive the confirmation. 

We just now decided to test two different subject lines. 

What filter/s should I add to the smart list? 

Thank you in advance. 

[Jon_Wright · Accepted solution]

From your screenshots it looks like you're setting up an a/b test on an email program. But all you need to do is add a 'Champion/Challenger' test to your confirmation email:

See docs here:

https://experienceleague.adobe.com/docs/marketo/using/product-docs/email-marketing/general/functions...

Your trigger campaign would just stay as it is.