Why did my a/b test only run for 3 days?

JLM
Level 1
Level 1

Why did my a/b test only run for 3 days?

I set up an a/b subject line test and it stopped after three days....I never declared a winner though and I wanted the test to run longer than that. Anyone know why? 

 

The a/b test is in a program so the email send runs from a trigger of "added to list"

JLM