There are a range of ways to Stress Test a plan in Voyant.
Special Events - Major Loss
Use the Market Crash Event in the Dashboard + button - Special Events - Major Loss event.
Use Year View - Investment/ Pensions tabs to check the assumed growth rates year on year.
Special Events - Income Protection and Critical illness
Other Special Events can model what happens if there is no income for a period of time and the impact of Income Protection and Critical illness cover:
A range of Insights, including Loss Capacity, Performance Insight and Monte Carlo >> Find guides for the Insights here
For a longer webinar on stress testing please see here: