diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index db726b0c..e871b3d4 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -382,13 +382,67 @@ jobs:
       # Checkout DataGateway API and setup Python
       - name: Check out repo
         uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v3.5.3
+      # Setup Java & Python
       - name: Setup Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
         with:
           python-version: ${{ matrix.python-version }}
           architecture: x64
+      - name: Setup Java
+        uses: actions/setup-java@b36c23c0d998641eff861008f374ee103c25ac73 # v4.4.0
+        with:
+          distribution: 'temurin'
+          java-version: 8
+
+       # ICAT Ansible clone and install dependencies
+      - name: Checkout icat-ansible
+        if: success()
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+        with:
+          repository: icatproject-contrib/icat-ansible
+          ref: master
+          path: icat-ansible
+      - name: Install Ansible
+        run: pip install -r icat-ansible/requirements.txt
+     # Prep for running the playbook
+      - name: Create hosts file
+        run: echo -e "[icatdb_minimal_hosts]\nlocalhost ansible_connection=local" > icat-ansible/hosts
+      - name: Prepare vault pass
+        run: echo -e "icattravispw" > icat-ansible/vault_pass.txt
+      - name: Move vault to directory it'll get detected by Ansible
+        run: mv icat-ansible/vault.yml icat-ansible/group_vars/all
+      - name: Replace default payara user with Actions user
+        run: |
+          sed -i -e "s/^payara_user: \"glassfish\"/payara_user: \"runner\"/" icat-ansible/group_vars/all/vars.yml
+
+      # Force hostname to localhost - bug fix for previous ICAT Ansible issues on Actions
+      - name: Change hostname to localhost
+        run: sudo hostname -b localhost
+
+      # Remove existing MySQL installation so it doesn't interfere with GitHub Actions
+      - name: Remove existing mysql
+        run: |
+          sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.mysqld
+          sudo apt-get remove --purge "mysql*"
+          sudo rm -rf /var/lib/mysql* /etc/mysql
+
+      # Create local instance of ICAT
+      - name: Run ICAT Ansible Playbook
+        run: |
+          ansible-playbook icat-ansible/icatdb_minimal_hosts.yml -i icat-ansible/hosts --vault-password-file icat-ansible/vault_pass.txt -vv
+
+      # rootUserNames needs editing as anon/anon is used in search API and required to pass endpoint tests
+      - name: Add anon user to rootUserNames
+        run: |
+          awk -F" =" '/rootUserNames/{$2="= simple/root anon/anon";print;next}1' /home/runner/install/icat.server/run.properties > /home/runner/install/icat.server/run.properties.tmp
+      - name: Apply rootUserNames change
+        run: |
+          mv -f /home/runner/install/icat.server/run.properties.tmp /home/runner/install/icat.server/run.properties
+      - name: Reinstall ICAT Server
+        run: |
+          cd /home/runner/install/icat.server/ && ./setup -vv install
 
-      # Create virtual environment and install DataGateway API
+        # Create virtual environment and install DataGateway API
       - name: Create and activate virtual environment
         run: |
           python3 -m venv dg-api-venv
@@ -407,9 +461,6 @@ jobs:
           '.datagateway_api.extension="/datagateway_api"' datagateway_api/config.yaml.example`" > datagateway_api/config.yaml.example
       - name: Create config.yaml
         run: cp datagateway_api/config.yaml.example datagateway_api/config.yaml
-      # These sections are removed so the API doesn't try to (and fail) to connect to an ICAT stack on startup
-      - name: Remove DataGateway API and Search API sections from config
-        run: yq -i 'del(.datagateway_api, .search_api)' datagateway_api/config.yaml
       - name: Create search_api_mapping.json
         run: cp datagateway_api/search_api_mapping.json.example datagateway_api/search_api_mapping.json