diff --git a/tools/unit-test-app/configs/app_update_s2 b/tools/unit-test-app/configs/app_update_s2
index fd65d7e189..50cf1444ec 100644
--- a/tools/unit-test-app/configs/app_update_s2
+++ b/tools/unit-test-app/configs/app_update_s2
@@ -10,5 +10,5 @@ CONFIG_BOOTLOADER_APP_TEST=y
 CONFIG_BOOTLOADER_HOLD_TIME_GPIO=2
 CONFIG_BOOTLOADER_OTA_DATA_ERASE=y
 CONFIG_BOOTLOADER_NUM_PIN_FACTORY_RESET=4
-CONFIG_BOOTLOADER_NUM_PIN_APP_TEST=32
+CONFIG_BOOTLOADER_NUM_PIN_APP_TEST=18
 CONFIG_IDF_TARGET="esp32s2"
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