diff --git a/apps/system/i2c/Makefile b/apps/system/i2c/Makefile
index ac26bd7c6d..8e8bed65e1 100644
--- a/apps/system/i2c/Makefile
+++ b/apps/system/i2c/Makefile
@@ -127,7 +127,7 @@ install:
 
 endif
 
-ifeq ($CONFIG_BUILTIN_APPS)$(CONFIG_SYSTEM_I2CTOOL),yy)
+ifeq ($(CONFIG_BUILTIN_APPS)$(CONFIG_SYSTEM_I2CTOOL),yy)
 $(BUILTIN_REGISTRY)$(DELIM)$(FUNCNAME).bdat: $(DEPCONFIG) Makefile
 	$(Q) $(call REGISTER,$(APPNAME),$(FUNCNAME),$(THREADEXEC),$(PRIORITY),$(STACKSIZE))
 
diff --git a/build/configs/qemu/build_test/defconfig b/build/configs/qemu/build_test/defconfig
index f83b8c3231..7ee87ec249 100644
--- a/build/configs/qemu/build_test/defconfig
+++ b/build/configs/qemu/build_test/defconfig
@@ -1188,13 +1188,7 @@ CONFIG_TASH_CMDTASK_PRIORITY=100
 # CONFIG_SYSTEM_CUTERM is not set
 # CONFIG_SYSTEM_FLASH_ERASEALL is not set
 # CONFIG_SYSTEM_FOTA_HAL is not set
-CONFIG_SYSTEM_I2CTOOL=y
-CONFIG_I2CTOOL_MINBUS=0
-CONFIG_I2CTOOL_MAXBUS=3
-CONFIG_I2CTOOL_MINADDR=0x03
-CONFIG_I2CTOOL_MAXADDR=0x77
-CONFIG_I2CTOOL_MAXREGADDR=0xff
-CONFIG_I2CTOOL_DEFFREQ=400000
+# CONFIG_SYSTEM_I2CTOOL is not set
 # CONFIG_SYSTEM_INIFILE is not set
 CONFIG_SYSTEM_PREAPP_INIT=y
 CONFIG_SYSTEM_PREAPP_STACKSIZE=2048