Editing email draft DURING AB test

Sorry if this feels like a re-run but I don't know if I've seen this question directly answered. Most people are asking about changing AB test parameters mid-test, but I'm asking about email content.

My manager wanted to add in a blurb to an email where the A/B subject line test (ie using the same email program) had already went out. So this little blurb should be included in the winner send. I updated and approved the draft used in the campaign.

Can I be sure that the change will be reflected in the winner? Or should I just abort and reconstruct the smart campaign (excluding people that were sent the test)? 

Thank you!