After diving a bit deeper into the code, it seems the only problem is the hierarchy separator being different for the AlternativeLaravelCache/Store/AlternativeHierarchialFileCacheStore.php, as it is the only one which uses cache pools that inherit from HierarchicalCachePool (HierarchialFilesystemCachePoolFlysystem1 and HierarchialFilesystemCachePoolFlysystem3).
Therefore the most simple solution is to override the return value for that store and remove the original check.
I've also added a simple docker setup for running the existing tests easily.
After diving a bit deeper into the code, it seems the only problem is the hierarchy separator being different for the AlternativeLaravelCache/Store/AlternativeHierarchialFileCacheStore.php, as it is the only one which uses cache pools that inherit from HierarchicalCachePool (HierarchialFilesystemCachePoolFlysystem1 and HierarchialFilesystemCachePoolFlysystem3).
Therefore the most simple solution is to override the return value for that store and remove the original check.
I've also added a simple docker setup for running the existing tests easily.