Geoff worked on the gpuweb/cts repository, focusing on aligning the test suite with evolving GPUWeb proposals. He addressed compatibility issues by updating tests to disable multisampling for specific integer texture formats and to skip certain tests on non-multisampled formats, reducing false negatives and improving continuous integration reliability. Using TypeScript and leveraging his skills in shader development and testing, Geoff’s changes ensured that the test suite accurately reflected current GPUWeb guidelines. This work provided a more stable foundation for validating future proposals, demonstrating careful attention to specification alignment and practical problem-solving in the context of WebGPU development and automated testing.