diff --git a/pytest.ini b/pytest.ini
index 30a7e19e0..9ff725e7b 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,3 +1,3 @@
 [pytest]
 markers =
-    slow: marks tests as slow (deselect with '--runslow')
+    slow: marks tests as slow (not run by default; run them with '--runslow')