diff --git a/.github/workflows/test-unit.yml b/.github/workflows/test-unit.yml
index 78c62bbb9..a663d5cbe 100644
--- a/.github/workflows/test-unit.yml
+++ b/.github/workflows/test-unit.yml
@@ -65,7 +65,9 @@ jobs:
           grep -m1 -P '^deb http://deb.debian.org/debian [a-z]+ main' /etc/apt/sources.list |
           awk '{print $3}'
         )
-        apt-get -t "${DEBIAN_RELEASE}-backports" install -y git zip libzip-dev libbz2-dev libpng-dev libjpeg-dev libwebp-dev libvpx-dev
+        USE_GIT_BPO="$(. /etc/os-release && test $VERSION_ID -lt 10 && echo "-t ${DEBIAN_RELEASE}-backports" || echo)"
+        apt-get $USE_GIT_BPO install -y git
+        apt-get -t "${DEBIAN_RELEASE}-backports" install -y zip libzip-dev libbz2-dev libpng-dev libjpeg-dev libwebp-dev libvpx-dev
 
     - name: Configure PHP gd extension with default bundle
       run: |