diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 18682eaf2..252309b7c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -64,6 +64,7 @@ jobs:
           TEST_SOLR_PORT: 8981
     env:
       RAILS_ENV: ${{ matrix.env }}
+      CHROMEDRIVER_VERSION: '114.0.5735.90'
     defaults:
       run:
         working-directory: ./rails/
@@ -76,6 +77,16 @@ jobs:
         with:
           bundler-cache: true # use Actions cache to significantly speed up subsequent runs
           working-directory: ./rails/
+      # Install ChromeDriver (wiping out whatever version was previously installed on Actions Runner)
+      - name: Install ChromeDriver
+        uses: nanasess/setup-chromedriver@v2
+        with:
+          chromedriver-version: ${{ env.CHROMEDRIVER_VERSION }}
+      # Install Google Chrome browser (that matches ChromeDriver version from previous Actions step)
+      - name: Install Google Chrome
+        run: |
+          wget -O /tmp/google_chrome.deb https://dl.google.com/linux/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_${CHROMEDRIVER_VERSION}-1_amd64.deb
+          sudo dpkg -i /tmp/google_chrome.deb
 
       - run: cp -v ./config/database.github_actions.yml ./config/database.yml
       - run: cp -v ./config/app_environment_variables.sample.rb ./config/app_environment_variables.rb
@@ -146,7 +157,7 @@ jobs:
             type=ref,event=pr
             type=sha,prefix=git-
       - name: Build & push Docker image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           #context: '{{defaultContext}}:rails'
           context: ./rails/
diff --git a/rails/spec/support/capybara_initializer.rb b/rails/spec/support/capybara_initializer.rb
index 3358cc86f..7a74862a6 100644
--- a/rails/spec/support/capybara_initializer.rb
+++ b/rails/spec/support/capybara_initializer.rb
@@ -25,6 +25,11 @@ def call
       Capybara.server_port = '43447'
     end
 
+    # ChromeDriver version shipped with GitHub Actions: https://github.com/actions/runner-images/blob/d5d4c565dffff750a33f0f7d020bc12a4a896d90/images/linux/Ubuntu2204-Readme.md?plain=1#L158
+    # Latest ChromeDriver version available for download: https://chromedriver.storage.googleapis.com/LATEST_RELEASE
+    # See: https://github.com/hitobito/hitobito/blob/c5a459a95feefc32f7caa4c3bd5b36c7cb149916/spec/spec_helper.rb#L190-L196
+    Webdrivers::Chromedriver.required_version = '114.0.5735.90' # Pin ChromeDriver version
+
     # Register the driver
     Capybara.register_driver(:selenium) { |app| driver(app) }
     Capybara.javascript_driver = :selenium
diff --git a/rails/spec/support/solr_spec_helper.rb b/rails/spec/support/solr_spec_helper.rb
index aaf7d3af9..9ec9944a0 100644
--- a/rails/spec/support/solr_spec_helper.rb
+++ b/rails/spec/support/solr_spec_helper.rb
@@ -1,3 +1,5 @@
+require 'open-uri'
+
 $original_sunspot_session = Sunspot.session
 Sunspot.session = Sunspot::Rails::StubSessionProxy.new($original_sunspot_session)
 
@@ -20,7 +22,7 @@ def reindex_all
   end
 
   def test_solr_server
-    open("http://#{SOLR_HOST}:#{SOLR_PORT}/")
+    URI.open("http://#{SOLR_HOST}:#{SOLR_PORT}/")
   end
 
   def solr_setup