diff --git a/.github/workflows/backend-ci.yaml b/.github/workflows/backend-ci.yaml
index 5e9054e..b55f913 100644
--- a/.github/workflows/backend-ci.yaml
+++ b/.github/workflows/backend-ci.yaml
@@ -1,36 +1,40 @@
-name: CI
+name: Backend CI
 
 on:
     push:
         branches:
-            - main
             - '[0-9]+.[0-9]+'
     pull_request: ~
+    workflow_dispatch: ~
 
 jobs:
     cs-fix:
         name: Run code style check
-        runs-on: "ubuntu-24.04"
+        runs-on: "ubuntu-26.04"
         strategy:
             matrix:
                 php:
                     - '8.1'
         steps:
-            -   uses: actions/checkout@v6
+            -   uses: actions/checkout@v7
 
             -   uses: ibexa/gh-workflows/actions/composer-install@main
                 with:
+                    php-version: ${{ matrix.php }}
                     gh-client-id: ${{ secrets.AUTOMATION_CLIENT_ID }}
                     gh-client-secret: ${{ secrets.AUTOMATION_CLIENT_SECRET }}
                     satis-network-key: ${{ secrets.SATIS_NETWORK_KEY }}
                     satis-network-token: ${{ secrets.SATIS_NETWORK_TOKEN }}
 
             -   name: Run code style check
-                run: composer run-script check-cs -- --format=checkstyle | cs2pr
+                shell: bash
+                run: |
+                    set -euo pipefail
+                    composer run-script check-cs -- --format=checkstyle | cs2pr
 
     tests:
         name: Unit tests
-        runs-on: "ubuntu-24.04"
+        runs-on: "ubuntu-26.04"
         timeout-minutes: 15
 
         strategy:
@@ -42,10 +46,11 @@ jobs:
                     - '8.4'
 
         steps:
-            -   uses: actions/checkout@v6
+            -   uses: actions/checkout@v7
 
             -   uses: ibexa/gh-workflows/actions/composer-install@main
                 with:
+                    php-version: ${{ matrix.php }}
                     gh-client-id: ${{ secrets.AUTOMATION_CLIENT_ID }}
                     gh-client-secret: ${{ secrets.AUTOMATION_CLIENT_SECRET }}
                     satis-network-key: ${{ secrets.SATIS_NETWORK_KEY }}
diff --git a/.github/workflows/integration-tests.yaml b/.github/workflows/integration-tests.yaml
index 584dd51..18d82c9 100644
--- a/.github/workflows/integration-tests.yaml
+++ b/.github/workflows/integration-tests.yaml
@@ -3,14 +3,13 @@ name: Solr integration tests
 on:
     push:
         branches:
-            - main
             - '[0-9]+.[0-9]+'
     pull_request: ~
 
 jobs:
     solr-integration:
         name: "Integration tests"
-        runs-on: "ubuntu-22.04"
+        runs-on: "ubuntu-26.04"
         strategy:
             fail-fast: false
             matrix:
@@ -23,6 +22,14 @@ jobs:
                     - 'shared'
                     - 'single'
                     - 'cloud'
+                include:
+                    # Solr 7.x uses the CMS garbage collector, removed in Java 14
+                    - solr-version: '7.7.3'
+                      java-version: '11'
+                    - solr-version: '8.11.2'
+                      java-version: '17'
+                    - solr-version: '9.8.1'
+                      java-version: '17'
         env:
             CORES_SETUP: ${{ matrix.cores-setup }}
             SOLR_VERSION: ${{ matrix.solr-version }}
@@ -35,22 +42,23 @@ jobs:
               name: "Set up single core"
               run: echo "SOLR_CORES=collection1" >> $GITHUB_ENV
 
-            - uses: actions/checkout@v3
-
-            - name: Setup PHP Action
-              uses: shivammathur/setup-php@v2
-              with:
-                  php-version: 7.4
-                  coverage: none
+            - uses: actions/checkout@v7
 
             -   name: Install Composer dependencies
                 uses: ibexa/gh-workflows/actions/composer-install@main
                 with:
+                    php-version: '7.4'
                     gh-client-id: ${{ secrets.AUTOMATION_CLIENT_ID }}
                     gh-client-secret: ${{ secrets.AUTOMATION_CLIENT_SECRET }}
                     satis-network-key: ${{ secrets.SATIS_NETWORK_KEY }}
                     satis-network-token: ${{ secrets.SATIS_NETWORK_TOKEN }}
 
+            - name: Set up Java
+              uses: actions/setup-java@v6
+              with:
+                  distribution: 'temurin'
+                  java-version: ${{ matrix.java-version }}
+
             - name: Init Solr
               run: ./.github/init_solr.sh
 
diff --git a/.github/workflows/pr-assign.yaml b/.github/workflows/pr-assign.yaml
deleted file mode 100644
index 302423e..0000000
--- a/.github/workflows/pr-assign.yaml
+++ /dev/null
@@ -1,10 +0,0 @@
-name: Assign Pull Request to maintainers
-
-on:
-    pull_request_target:
-
-jobs:
-    assign:
-        uses: ibexa/gh-workflows/.github/workflows/pr-assign.yml@main
-        secrets:
-            robot-token: ${{ secrets.EZROBOT_PAT }}