diff --git a/source/libs/index/test/utilUT.cc b/source/libs/index/test/utilUT.cc
index ffa4ead774..bb06a29b23 100644
--- a/source/libs/index/test/utilUT.cc
+++ b/source/libs/index/test/utilUT.cc
@@ -222,6 +222,7 @@ TEST_F(UtilEnv, 04union) {
   for (int i = 0; i < sizeof(arr3) / sizeof(arr3[0]); i++) {
     taosArrayPush(f, &arr3[i]);
   }
+
   iUnion(src, rslt);
   assert(taosArrayGetSize(rslt) == 11);
 }