diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e5ad35cb..7cb4f6b1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,7 +42,7 @@ jobs:
           pio ci --lib="." --board=due --project-option="build_flags=-Wno-misleading-indentation"
 
           # Ignore warnings in the Arduino core
-          pio ci --lib="." --board=adafruit_feather_nrf52840 --project-option="build_flags=-Wno-sign-compare -Wno-unused-function"
+          pio ci --lib="." --board=adafruit_feather_nrf52840 --project-option="build_flags=-Wno-sign-compare -Wno-unused-function -Wno-unused-variable"
         env:
           PLATFORMIO_CI_SRC: ${{ matrix.example }}
           PLATFORMIO_BUILD_FLAGS: -DWIICAMERA -DDEBUG_USB_HOST -Wall -Werror