ScriptableRenderPipeline/TestProjects/PostProcessing/Packages/manifest.json

{
    "dependencies": {
        "com.unity.postprocessing": "file:../../../com.unity.postprocessing",
        "com.unity.testframework.graphics": "file:../../../com.unity.testframework.graphics"
    },
    "testables": [
        "com.unity.postprocessing",
        "com.unity.testframework.graphics"
    ]
}