both xvfb and Xvfb are shown in which but PATH isn't updating

Author: ntBre

.github/workflows/test.yml

@@ -30,10 +30,7 @@ jobs:
         run: |
           brew install libxft libxinerama
           brew install --cask xquartz
-          export PATH=$PATH:/opt/X11/bin
-          which xvfb
-          which Xvfb
-          ls /opt/X11
+          echo "PATH=$PATH:/opt/X11/bin" >> $GITHUB_ENV
       - name: Install ${{ matrix.toolchain }}
         uses: dtolnay/rust-toolchain@master
         with: