diff --git a/tox.ini b/tox.ini
index 2b87199c8..131bacae6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -168,6 +168,12 @@ filterwarnings =
 pytester_example_dir = testing/example_scripts
 markers =
     issue
+    nothing
+    foo
+    bar
+    baz
+    xyz
+    XYZ
 
 [flake8]
 max-line-length = 120