The Temporal project, a cloud-native workflow management system, has conducted extensive stress testing to validate its ability to sustain performance under high loads. The "rabbit" scenario generates an exponential burst of load across the entire cluster, while the "reactor" scenario exercises a wide-variety of Temporal features that are commonly used in the field. Stress tests have been run using both the Go and Java SDKs, with the goal of hardening the Java SDK and further proving the stability of the Temporal product. The tests validate various aspects of Temporal's functionality, including workflow execution, signal processing, and worker behavior, and help identify issues such as workflow history corruption and simultaneous SignalWithStarts for the same Workflow ID. Ongoing work includes failure testing and porting stress tests to the Java SDK.