diff --git a/packages/indexer-nibi/src/node-test.ts b/packages/indexer-nibi/src/node-test.ts
index 79db610c..e93e526d 100644
--- a/packages/indexer-nibi/src/node-test.ts
+++ b/packages/indexer-nibi/src/node-test.ts
@@ -1,12 +1,14 @@
 import { HeartMonitor } from "./heart-monitor"
+
 ;(async () => {
   const hm = new HeartMonitor()
-  const b = await hm.markPriceCandlesSubscription({})
-
-  for await (const event of b) {
-    console.log(event)
+  const test = await hm.markPriceCandlesSubscription({})
+  if (test) {
+    for await (const event of test) {
+      console.log(event)
 
-    // complete a running subscription by breaking the iterator loop
-    // break
+      // complete a running subscription by breaking the iterator loop
+      // break
+    }
   }
 })()