diff --git a/.github/workflows/test-core-linux.yml b/.github/workflows/test-core-linux.yml
index 616eca382f..e3906fc9d6 100644
--- a/.github/workflows/test-core-linux.yml
+++ b/.github/workflows/test-core-linux.yml
@@ -23,15 +23,17 @@ jobs:
           python-version: "3.11"
       - name: Install Firefox manually and dependencies
         run: |
-          sudo apt purge -y firefox
-          sudo apt update
           sudo add-apt-repository ppa:mozillateam/ppa -y
+          sudo apt purge -y firefox
           echo '
           Package: *
           Pin: release o=LP-PPA-mozillateam
           Pin-Priority: 1001
+
+          Package: firefox
+          Pin: version 1:1snap1-0ubuntu2
+          Pin-Priority: -1
           ' | sudo tee /etc/apt/preferences.d/mozilla-firefox
-          sudo apt update
           sudo apt install --no-install-recommends -y openssl git nodejs tar bzip2 wget curl grep libx11-xcb1 libappindicator3-1 libasound2 libdbus-glib-1-2 libxtst6 libxt6 php-fpm unzip firefox
       - name: Download geckodriver
         uses: nick-fields/retry@14672906e672a08bd6eeb15720e9ed3ce869cdd4 # v2.9.0
@@ -57,7 +59,7 @@ jobs:
           container_id=$(docker create "ghcr.io/bunkerity/ubuntu-tests:${{ inputs.RELEASE }}")
           docker cp "$container_id:/opt/bunkerweb_${{ inputs.RELEASE }}-1_amd64.deb" "/tmp/bunkerweb.deb"
           docker rm "$container_id"
-      - name: Install BunkerWeb
+      - name: Install NGINX
         run: |
           sudo apt install -y gnupg2 ca-certificates lsb-release ubuntu-keyring
           curl https://nginx.org/keys/nginx_signing.key | gpg --dearmor | sudo tee /usr/share/keyrings/nginx-archive-keyring.gpg >/dev/null
diff --git a/.github/workflows/tests-ui-linux.yml b/.github/workflows/tests-ui-linux.yml
index be47fa7d50..5e2ac2b6d1 100644
--- a/.github/workflows/tests-ui-linux.yml
+++ b/.github/workflows/tests-ui-linux.yml
@@ -20,15 +20,17 @@ jobs:
           python-version: "3.11"
       - name: Install Firefox manually and dependencies
         run: |
-          sudo apt purge -y firefox
-          sudo apt update
           sudo add-apt-repository ppa:mozillateam/ppa -y
+          sudo apt purge -y firefox
           echo '
           Package: *
           Pin: release o=LP-PPA-mozillateam
           Pin-Priority: 1001
+
+          Package: firefox
+          Pin: version 1:1snap1-0ubuntu2
+          Pin-Priority: -1
           ' | sudo tee /etc/apt/preferences.d/mozilla-firefox
-          sudo apt update
           sudo apt install --no-install-recommends -y openssl git nodejs tar bzip2 wget curl grep libx11-xcb1 libappindicator3-1 libasound2 libdbus-glib-1-2 libxtst6 libxt6 php-fpm unzip firefox
       - name: Download geckodriver
         uses: nick-fields/retry@14672906e672a08bd6eeb15720e9ed3ce869cdd4 # v2.9.0
@@ -54,7 +56,7 @@ jobs:
           container_id=$(docker create "ghcr.io/bunkerity/ubuntu-tests:${{ inputs.RELEASE }}")
           docker cp "$container_id:/opt/bunkerweb_${{ inputs.RELEASE }}-1_amd64.deb" "/tmp/bunkerweb.deb"
           docker rm "$container_id"
-      - name: Install BunkerWeb
+      - name: Install NGINX
         run: |
           sudo apt install -y gnupg2 ca-certificates lsb-release ubuntu-keyring
           curl https://nginx.org/keys/nginx_signing.key | gpg --dearmor | sudo tee /usr/share/keyrings/nginx-archive-keyring.gpg >/dev/null