diff --git a/build/build_dtest_kl3.sh b/build/build_dtest_kl3.sh
index 9e2d731..8555c0e 100755
--- a/build/build_dtest_kl3.sh
+++ b/build/build_dtest_kl3.sh
@@ -31,6 +31,8 @@ export dtest_only=1
 
 set -o errexit
 
+export CLEANUP_OPT
+
 if [ "${CLEANUP_OPT}" == "1" ]; then
     make -j -C .. clobber
     make -j -C .. dtest_clean
diff --git a/build/build_time_cost_test.py b/build/build_time_cost_test.py
index ddd2afd..9e30c98 100755
--- a/build/build_time_cost_test.py
+++ b/build/build_time_cost_test.py
@@ -11,7 +11,8 @@ if __name__ == "__main__":
     time_start=time.time()
     if(len(sys.argv)>2):
         cmd=f"{' '.join(sys.argv[1:])} > build_log.log"
-        os.system("python3 ../clear_output.py > /dev/null")
+        if not ('not_clean' in sys.argv[1:]):
+            os.system("python3 ../clear_output.py > /dev/null")
         path="../tools/gen_img/customer"
         if os.path.exists(path):
             shutil.rmtree(path)
diff --git a/dtest/dtest3/Makefile b/dtest/dtest3/Makefile
index e350540..5f48753 100644
--- a/dtest/dtest3/Makefile
+++ b/dtest/dtest3/Makefile
@@ -9,20 +9,22 @@ OUTPUT_NAME	= dtest
 ifeq ($(target), kunlun3)
 hw_dep = hw3
 endif
-
+ifeq ($(CLEANUP_OPT), 1)
 SUB_DIRS = $(TOPDIR)/common $(TOPDIR)/driver $(TOPDIR)/bb_cpu $(TOPDIR)/startup $(TOPDIR)/os $(TOPDIR)/pib  $(TOPDIR)/plc
+endif
 
 ifeq ($(target), kunlun3)
 ifneq ($(findstring $(build_amp_type), 0 2),)
-SUB_DIRS += mac_phy mac_rx_test mac_tx_test
-SUB_DIRS += kl3_amp_gpio_test kl3_cache_ram_test kl3_dma_sw_test kl3_dma_uart_test kl3_efuse_test \
-kl3_exception_test kl3_fft_test kl3_gp_timer_test kl3_gpio_test kl3_gpio_test2 kl3_i2c_test \
-kl3_intc_monitor_test kl3_ledc_test kl3_mailbox_amp_test kl3_mailbox_amp_test_1 kl3_mailbox_test \
-kl3_multi_core_debug_test kl3_multi_core_plc_test kl3_multi_uart_test kl3_os_sec_test kl3_os_spi_test \
-kl3_os_systick_test kl3_os_test kl3_pmp_test kl3_pwm_test kl3_rstflag_test kl3_rtc_test \
-kl3_sadc_dma_hw_test kl3_sadc_test kl3_sfc_test kl3_smc_test kl3_spi_dma_hw_test kl3_spinlock_test \
-kl3_uart_dma_hw_test kl3_uart_test kl3_wdg_test unit_test_ledc unit_test_pwm kl3_bond_test \
-kl3_sadc_reg_ctrl_test
+# SUB_DIRS += mac_phy mac_rx_test mac_tx_test
+# SUB_DIRS += kl3_amp_gpio_test kl3_cache_ram_test kl3_dma_sw_test kl3_dma_uart_test kl3_efuse_test \
+# kl3_exception_test kl3_fft_test kl3_gp_timer_test kl3_gpio_test kl3_gpio_test2 kl3_i2c_test \
+# kl3_intc_monitor_test kl3_ledc_test kl3_mailbox_amp_test kl3_mailbox_amp_test_1 kl3_mailbox_test \
+# kl3_multi_core_debug_test kl3_multi_core_plc_test kl3_multi_uart_test kl3_os_sec_test kl3_os_spi_test \
+# kl3_os_systick_test kl3_os_test kl3_pmp_test kl3_pwm_test kl3_rstflag_test kl3_rtc_test \
+# kl3_sadc_dma_hw_test kl3_sadc_test kl3_sfc_test kl3_smc_test kl3_spi_dma_hw_test kl3_spinlock_test \
+# kl3_uart_dma_hw_test kl3_uart_test kl3_wdg_test unit_test_ledc unit_test_pwm kl3_bond_test \
+# kl3_sadc_reg_ctrl_test
+SUB_DIRS += kl3_gpio_uart
 endif
 endif