diff --git a/.gitlab-ci/setup-container.sh b/.gitlab-ci/setup-container.sh
index 8d29e1c..5e9b89d 100755
--- a/.gitlab-ci/setup-container.sh
+++ b/.gitlab-ci/setup-container.sh
@@ -145,7 +145,7 @@ cbuild_install_pkgs() {
 	# The qt6-tools-dev-tools package is only available for bullseye in the
 	# backports repository. Enable backports only for that version.
 	if [[ $FDO_DISTRIBUTION_VERSION == 'bullseye' ]] ; then
-		echo "deb http://deb.debian.org/debian bullseye-backports main" \
+		echo "deb http://archive.debian.org/debian bullseye-backports main" \
 		       > /etc/apt/sources.list.d/bullseye-backports.list
 		apt update
 	fi
diff --git a/gitlab-ci.yml b/gitlab-ci.yml
index 6dfe4f4..3370176 100644
--- a/gitlab-ci.yml
+++ b/gitlab-ci.yml
@@ -60,7 +60,7 @@ include:
 .libcamera-ci.debian:11:
   variables:
     FDO_DISTRIBUTION_VERSION: 'bullseye'
-    FDO_DISTRIBUTION_TAG: '2025-02-27.1'
+    FDO_DISTRIBUTION_TAG: '2025-07-24.1'

 .libcamera-ci.debian:12:
   variables:
@@ -224,6 +224,7 @@ build-full:debian:13:
         MESON_OPTIONS: >-
           ${MESON_ALL_OPTIONS}
           -D cpp_std=c++20
+          -D force_fallback_for=['gtest']
       - ARCH: amd64
         CC: gcc-14
         CXX: g++-14