diff --git a/clearnode/chart/config/sandbox/blockchains.yaml b/clearnode/chart/config/sandbox/blockchains.yaml
index f12aea0de..b907fd60f 100644
--- a/clearnode/chart/config/sandbox/blockchains.yaml
+++ b/clearnode/chart/config/sandbox/blockchains.yaml
@@ -26,3 +26,9 @@ blockchains:
     custody: "0x442f5544983eA73ED75FbDD252bc03842D185284"
     adjudicator: "0xBa28DC8F50d076Df76fF9959f31A320686faa373"
     balance_checker: "0x714698e8fe7896bb84A46c0705944c4a48580819"
+- name: polkadot_hub_testnet
+  id: 420420417
+  contract_addresses:
+    custody: "0x0000000000000000000000000000000000000000"
+    adjudicator: "0x0000000000000000000000000000000000000000"
+    balance_checker: "0x0000000000000000000000000000000000000000"