The _load() helper in test/unit/python/jw/pkg/lib/ProjectConf/test.py uses tempfile.NamedTemporaryFile(..., delete=False) but never removes the created files. Each test call leaked a .conf file in /tmp.
Track all created paths in a _tmpfiles list and call _cleanup() at the end of the test to unlink them.
Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL with pi.dev v0.80.2
Signed-off-by: Jan Lindemann <jan@janware.com>