The result of the Keying Screen node tests is very different yet the test succeeds, that's because the test result has a very small number of pixels compared to the final image. To fix this, we match the size of the result with the render size. This also updated the test reference which should have been updated after the new RBF interpolation implementation of the node. Pull Request: https://projects.blender.org/blender/blender/pulls/147449