Loading files from the classpath throws FileSystemNotFoundException

[MaSven]

I have a test-resource folder where my data sits for testing purpose. I have to load the testdata as File because this is what my API excepts. I thought i could easily load a File from my Resource path with

assert (exists Resource resource = `module test.space.smarquardt.csvparser`.resourceByPath("TestNormal.csv"));
value csvPath = parseURI(resource.uri);

But this will trow an FileSystemNotFoundException.
Is there a better way to load resources as Files? I thought this would work like in Java with

new File(this.getClass().getResource("foo.txt").toUri());

that would give me a File.
It seems to be that the uri starts with classpath:// an there is no filesystem activated for this.