diff --git a/tests/components/st7789v/test.esp32-c3-idf.yaml b/tests/components/st7789v/test.esp32-c3-idf.yaml
index b112cf4c31..b4d70edb31 100644
--- a/tests/components/st7789v/test.esp32-c3-idf.yaml
+++ b/tests/components/st7789v/test.esp32-c3-idf.yaml
@@ -2,6 +2,8 @@ substitutions:
   cs_pin: GPIO8
   dc_pin: GPIO9
   reset_pin: GPIO10
+  backlight_pin: GPIO7
+
 packages:
   spi: !include ../../test_build_components/common/spi/esp32-c3-idf.yaml