diff --git a/tests/unit/utils/test_standarddir.py b/tests/unit/utils/test_standarddir.py
index 1b9e473d1..c0f63d410 100644
--- a/tests/unit/utils/test_standarddir.py
+++ b/tests/unit/utils/test_standarddir.py
@@ -103,6 +103,7 @@ def test_fake_windows(tmpdir, monkeypatch, what):
     assert func() == str(tmpdir / APPNAME / what)
 
 
+@pytest.mark.posix
 def test_fake_haiku(tmpdir, monkeypatch):
     """Test getting data dir on HaikuOS."""
     locations = {