diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index abbc0d5..e79a342 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -51,11 +51,11 @@ jobs:
           repository: raspberrypi/pico-sdk
           ref: develop
           path: pico-sdk
-          submodules: ${{ matrix.mbedtls }}
+          submodules: ${{ !(!matrix.mbedtls) }}
 
       - name: Build and Install
         run: |
-          cmake -S . -B build -G "${{ matrix.generator }}" -D PICO_SDK_PATH="${{ github.workspace }}/pico-sdk" ${{ matrix.libusb && '-D PICOTOOL_NO_LIBUSB=1' || '' }} ${{ matrix.compile && '-D USE_PRECOMPILED=false' || '' }}
+          cmake -S . -B build -G "${{ matrix.generator }}" -D PICO_SDK_PATH="${{ github.workspace }}/pico-sdk" ${{ !matrix.libusb && '-D PICOTOOL_NO_LIBUSB=1' || '' }} ${{ matrix.compile && '-D USE_PRECOMPILED=false' || '' }}
           cmake --build build
           ${{ runner.os != 'Windows' && 'sudo' || '' }} cmake --install build
       - name: Add to path (Windows)