diff --git a/Makefile b/Makefile
index fbd4f2f..7584890 100644
--- a/Makefile
+++ b/Makefile
@@ -45,6 +45,7 @@ BUILD_ARGS=-I$(UVM_HOME)/src -I. \
         --error-limit 10 \
         --timing $(TIMESCALE) \
         --trace \
+        --x-initial 0 \
         --top tb_top \
         +define+SVA_ON \
         $(TB_DEFINES) \
@@ -112,7 +113,7 @@ run: $(CPP_OUT)
 	$(info #---------------------)
 	@if [ ! -d runs/$(TEST_NAME) ]; then mkdir -p runs/$(TEST_NAME); fi
 	@cd runs/$(TEST_NAME) && \
-        $(PROJ_BASE)/obj_dir/$(PROJ).sim +UVM_TESTNAME=$(TEST_NAME) +UVM_CONFIG_DB_TRACE |& tee $(SIM_LOG)
+        $(PROJ_BASE)/obj_dir/$(PROJ).sim +verilator+seed+2 +UVM_TESTNAME=$(TEST_NAME) +UVM_CONFIG_DB_TRACE |& tee $(SIM_LOG)
 	notify-send "[$(PROJ)] Test run done"
 
 #