diff --git a/.github/workflows/isolated-tests.yml b/.github/workflows/isolated-tests.yml
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+# Github Action to build and run tests, but in more isolation
+
+name: Isolated tests
+permissions: {}
+
+on:
+  push:
+    branches: [develop, master, sf-qa, sf-live]
+  pull_request:
+  merge_group:
+  workflow_dispatch:
+
+jobs:
+  build-development:
+    name: "Isolated tests"
+    strategy:
+      matrix:
+        # Environments in which to run, such as those used in development and production, or which are candidates to
+        # move to.
+        os: ["ubuntu-22.04"]
+        dotnet_version: ["8.0.x"]
+        node_version: ["22.13.0"]
+        npm_version: ["10.9.2"]
+      # Continue building in other environments to see which are working.
+      fail-fast: false
+    runs-on: ${{matrix.os}}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+
+      - name: "Deps: .NET"
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: ${{matrix.dotnet_version}}
+          cache: true
+          cache-dependency-path: src/SIL.XForge.Scripture/packages.lock.json
+      - name: "Deps: Node"
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{matrix.node_version}}
+          cache: "npm"
+          cache-dependency-path: |
+            src/SIL.XForge.Scripture/ClientApp/package-lock.json
+            src/RealtimeServer/package-lock.json
+      - name: "Deps: npm"
+        env:
+          NPM_VERSION: ${{matrix.npm_version}}
+        run: |
+          set -xueo pipefail
+          npm install --global npm@${NPM_VERSION}
+      - name: Pre-build report
+        run: |
+          set -xueo pipefail
+          lsb_release -a
+          which dotnet
+          dotnet --version
+          dotnet --list-sdks
+          dotnet --list-runtimes
+          which node
+          node --version
+          which npm
+          npm --version
+          which chromium-browser
+          chromium-browser --version
+      - name: "Ensure desired tool versions"
+        # The build machine may come with newer tools than we are ready for.
+        env:
+          NODE_VERSION: ${{matrix.node_version}}
+          NPM_VERSION: ${{matrix.npm_version}}
+        run: |
+          set -xueo pipefail
+          [[ $(node --version) == v${NODE_VERSION} ]]
+          [[ $(npm --version) == ${NPM_VERSION} ]]
+
+      - name: "Deps: reportgenerator tool"
+        run: dotnet tool install --global dotnet-reportgenerator-globaltool
+      - name: "Deps: RealtimeServer npm"
+        run: cd src/RealtimeServer && (npm ci || (sleep 3m && npm ci))
+      - name: "Deps: Backend nuget"
+        run: dotnet restore
+      - name: "Deps: Frontend npm"
+        run: cd src/SIL.XForge.Scripture/ClientApp && (npm ci || (sleep 3m && npm ci))
+
+      - name: "Build: Backend, RealtimeServer"
+        run: dotnet build xForge.sln
+      - name: "Build: Frontend"
+        run: cd src/SIL.XForge.Scripture/ClientApp && npm run build
+
+      - name: "Test: Ensure tests not focused on a subset"
+        # grep returns code 123 when no matches are found. The operator ! negates the exit code.
+        run: |
+          ! git ls-files | grep "\\.spec\\.ts" | xargs grep -P "^\s*(fdescribe|fit)\("
+      # Run the tests while making sure none of the common/known warnings are printed
+      - name: "Test: Frontend"
+        run: |
+          set -euo pipefail
+          cd src/SIL.XForge.Scripture/ClientApp
+          find src -name \*.spec.ts -exec npm run test:gha -- --include {} \; |& tee test_output.log
+          ! grep --perl-regex 'NG\d+|ERROR:|WARN:|LOG:|INFO:' test_output.log