Every R2 release lands on the same date for every Workday customer, but the aftermath does not. Some organisations sail through with a handful of minor tweaks. Others spend the following month firefighting broken integrations, miscalculated approvals, and reports that quietly stopped matching reality. The difference is rarely luck. It is almost always testing scope, and three specific mistakes keep showing up in tenants that struggle after every major release.
For a Head of Enterprise Apps, these mistakes are rarely visible until they have already caused a problem. Testing is one of the few areas where doing it well looks like nothing happening at all, which makes it an easy line item to under-resource until a release proves otherwise.
Mistake One: Testing the Release Notes, Not the Dependencies
The most common mistake is scoping testing to exactly what the release notes say has changed, and nothing else. Workday’s release notes describe the feature. They do not describe every custom integration, calculated field, or downstream report that quietly depends on the object being changed. A field update that looks cosmetic in the notes can break an EIB three steps removed from it, and nobody finds out until payroll runs.
Proper regression testing starts from an impact map, not a changelog. Before testing begins, the question is not “what did Workday change” but “what in our tenant touches what Workday changed.” That map should already exist from the last release cycle, updated incrementally rather than rebuilt from scratch each time. Without it, testing effort gets spent confirming the feature Workday describes works as documented, while the custom integration three steps away from it goes untouched until it fails in production.
Mistake Two: No Protected Testing Window
The second mistake is treating testing as something that happens in whatever time is left over once business-as-usual work is done. HR and Finance system leads are rarely given dedicated hours to test a release properly, so testing becomes rushed, partial, and inconsistent from one cycle to the next. Scripts that were thorough at go-live get skipped under time pressure, and nobody notices until the gap they left behind causes a problem.
A protected testing window, blocked out in the calendar as soon as release dates are confirmed, is the single highest-leverage fix available. It does not need to be large. It needs to be consistent, and it needs to be treated with the same priority as any other deadline the business would not allow to slip. Where that protected time genuinely cannot be found internally, that is usually the moment testing gets quietly handed to whoever has a spare afternoon, which is exactly how the second mistake compounds the first.
Mistake Three: A Testing Tenant That Has Drifted From Production
The third mistake undermines the other two even when they are fixed. A testing tenant that has not been refreshed in months, or that has configuration drift of its own relative to production, produces test results that look clean but do not mean anything. Defects get missed not because testing was skipped, but because it was run against an environment that no longer resembles what employees actually use.
Keeping the testing tenant close to production, refreshed on a predictable schedule and reviewed for its own configuration drift, is what makes every other testing investment worth making. A pristine impact map and a fully protected testing window still produce false confidence if the environment they are tested against no longer reflects reality.
What Good Testing Looks Like at Every Release
None of this requires a bigger team, only a repeatable rhythm: an impact map maintained release over release, a protected testing window nobody can deprioritise, and a testing tenant kept honest. Applied consistently, R1 and R2 stop being disruptive events and become predictable, controlled checkpoints instead. Our guide to structured Workday release management goes further into how to build impact assessment, sign-off, and communication around this rhythm.
These three mistakes are only part of the picture. Testing discipline is one of three pillars that determine whether an organisation keeps closing the gap between what Workday can do and what it actually does, alongside Core HCM hygiene and business process design.
Read the full framework in the pillar guide, Adopt Without Disruption: The Complete Post-Go-Live Playbook, or book a free Workday Health Check to see where your own testing rhythm stands ahead of the next release.