diff --git a/tests/components/st7789v/test.esp8266-ard.yaml b/tests/components/st7789v/test.esp8266-ard.yaml
index 56cb29f29e..0ddca66ef4 100644
--- a/tests/components/st7789v/test.esp8266-ard.yaml
+++ b/tests/components/st7789v/test.esp8266-ard.yaml
@@ -5,6 +5,7 @@ substitutions:
   cs_pin: GPIO5
   dc_pin: GPIO15
   reset_pin: GPIO16
+  backlight_pin: GPIO4
 
 packages:
   spi: !include ../../test_build_components/common/spi/esp8266-ard.yaml
diff --git a/tests/components/st7789v/test.rp2040-ard.yaml b/tests/components/st7789v/test.rp2040-ard.yaml
index 66caa956f7..464e720549 100644
--- a/tests/components/st7789v/test.rp2040-ard.yaml
+++ b/tests/components/st7789v/test.rp2040-ard.yaml
@@ -5,6 +5,7 @@ substitutions:
   cs_pin: GPIO5
   dc_pin: GPIO15
   reset_pin: GPIO16
+  backlight_pin: GPIO6
 
 packages:
   spi: !include ../../test_build_components/common/spi/rp2040-ard.yaml