diff --git a/pytest.ini b/pytest.ini
index 5172db2..0b40b0a 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,5 +1,7 @@
 [pytest]
 # Drop this when these fixtures aren't imported automatically
 addopts = -p no:pytest_swh_scheduler -p no:pytest_swh_storage
+markers =
+    fs: depends on writing to the filesystem
 
 norecursedirs = docs .*