diff --git a/tox.ini b/tox.ini
index 6289a7ea..b774c151 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@ basepython = python3.12
 commands =
     python -m coverage combine
     python -m coverage report -m -i --skip-covered
-    python -m coverage json
+    python -m coverage json -i
 
 [gh-actions]
 python =