diff --git a/polkadot/zombienet_tests/functional/0018-shared-core-idle-parachain.toml b/polkadot/zombienet_tests/functional/0018-shared-core-idle-parachain.toml
index 745c4f9e24b1..d3ff00002242 100644
--- a/polkadot/zombienet_tests/functional/0018-shared-core-idle-parachain.toml
+++ b/polkadot/zombienet_tests/functional/0018-shared-core-idle-parachain.toml
@@ -36,4 +36,4 @@ chain = "glutton-westend-local-2000"
     name = "collator-2000"
     image = "{{CUMULUS_IMAGE}}"
     command = "polkadot-parachain"
-    args = ["-lparachain=debug"]
+    args = ["-lparachain=debug", "--experimental-use-slot-based"]