diff --git a/pytest.ini b/pytest.ini
index 117bd5517b19..cf2b3462e18e 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -7,6 +7,7 @@ python_files = test_*.py
 markers =
     backend: Set alternate Matplotlib backend temporarily.
     style: Set alternate Matplotlib style temporarily.
+    baseline_images: Set baseline images for parametrized image_comparison.
 
 filterwarnings =
     error