diff --git a/packages/neuron-ui/src/components/Transaction/index.tsx b/packages/neuron-ui/src/components/Transaction/index.tsx
index 54b83c0b54..b14dae6c1b 100644
--- a/packages/neuron-ui/src/components/Transaction/index.tsx
+++ b/packages/neuron-ui/src/components/Transaction/index.tsx
@@ -246,9 +246,10 @@ const Transaction = () => {
     })
   }, [])
 
-  // TODO: add conditional branch on mainnet and testnet
   const onExplorerBtnClick = useCallback(() => {
-    openExternal(`https://explorer.nervos.org/transaction/${transaction.hash}`)
+    const isMainnet = false // TODO: add conditional branch on mainnet and testnet
+    const explorerUrl = isMainnet ? 'https://explorer.nervos.org' : 'https://explorer.nervos.org/testnet'
+    openExternal(`${explorerUrl}/transaction/${transaction.hash}`)
   }, [transaction.hash])
 
   const basicInfoItems = useMemo(
diff --git a/packages/neuron-wallet/src/models/chain-info.ts b/packages/neuron-wallet/src/models/chain-info.ts
index d5fbf6394b..630fc3ac22 100644
--- a/packages/neuron-wallet/src/models/chain-info.ts
+++ b/packages/neuron-wallet/src/models/chain-info.ts
@@ -27,6 +27,6 @@ export default class ChainInfo {
     if (this.isMainnet()) {
       return "https://explorer.nervos.org"
     }
-    return "https://explorer.nervos.org" // TODO: change this to proper testnet explorer URL
+    return "https://explorer.nervos.org/testnet"
   }
 }