diff --git a/pytest.ini b/pytest.ini
index afa4cf3..1d006ad 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,2 +1,6 @@
 [pytest]
 norecursedirs = docs
+
+markers =
+    db: marks tests as using a db (deselect with '-m "not db"')
+    fs: marks tests as using the filesystem (deselect with '-m "not fs"')