Happy callers are easy. Every agent handles cooperative people well. The real test is what happens when the caller is angry, panicked, impatient, hostile, or has called four times already. That's when every other behavior is tested at once. Does the agent still verify identity when the caller is rushing? Still confirm the order when the caller is annoyed? Still say "I don't know" when the caller is demanding an answer? Coval stress-tests your agent against the callers who will define its production reputation.
Get StartedWe score each transcript against the pressure-handling rules for your context.
Frustration is the canonical adversarial test. Caller intent is legitimate, but the delivery is hard. We run six distinct adversarial patterns: impatient, demanding, angry, repeat callers, interrupters, and verbal abusers. Each fails the agent in a different way.
Tell Coval what your agent does. We generate frustration scenarios for your context, run them as calls, and score how the agent handled the emotion while still moving toward resolution.
This is the most plug-and-play test in the platform. No knowledge base, no custom inputs required. Frustration handling is behavior-based, and we test it directly.
Make sure your agent confirms who it’s talking to before it shares information or takes action.
Learn more →Test how your agent gathers the details it needs without missing a field or asking twice.
Learn more →Catch errors before they become refunds, wrong transfers, or actions taken on bad data.
Learn more →Test the moments your agent should smoothly hand off and when it shouldn’t.
Learn more →Test whether your agent makes things up when it doesn’t know the answer.
Learn more →Test what happens when callers go off-script, probe its identity, or try to break character.
Learn more →