diff --git a/tox.ini b/tox.ini
index 92a2e94566..20283f50c3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -142,7 +142,7 @@ commands =
         --tb=no \
         --show-capture=no \
         --disable-warnings \
-        -m "not slow and not benchmark and not derived_test" \
+        -m "json_loader and not derived_test" \
         -n auto --maxprocesses 7 \
         # loadgroup: serialize xdist_group("bigmem") tests onto one worker to limit peak memory
         --dist=loadgroup \