diff --git a/ci-scripts/conf_files/lte-basic-sim.conf b/ci-scripts/conf_files/lte-basic-sim.conf
index 4d4930ad88..0b02e8f871 100644
--- a/ci-scripts/conf_files/lte-basic-sim.conf
+++ b/ci-scripts/conf_files/lte-basic-sim.conf
@@ -232,7 +232,7 @@ RUs = (
 THREAD_STRUCT = (
   {
     #three config for level of parallelism "PARALLEL_SINGLE_THREAD", "PARALLEL_RU_L1_SPLIT", or "PARALLEL_RU_L1_TRX_SPLIT"
-    parallel_config    = "PARALLEL_RU_L1_TRX_SPLIT";
+    parallel_config    = "PARALLEL_SINGLE_THREAD";
     #two option for worker "WORKER_DISABLE" or "WORKER_ENABLE"
     worker_config      = "WORKER_ENABLE";
   }