diff --git a/.github/workflows/dataviewer-backend-pytests.yml b/.github/workflows/dataviewer-backend-pytests.yml
new file mode 100644
index 00000000..aa55aaf9
--- /dev/null
+++ b/.github/workflows/dataviewer-backend-pytests.yml
@@ -0,0 +1,65 @@
+name: Dataviewer Backend Pytest
+
+on:
+  workflow_call:
+    inputs:
+      code-coverage:
+        description: 'Enable Codecov coverage upload'
+        required: false
+        default: false
+        type: boolean
+
+permissions:
+  contents: read
+
+jobs:
+  pytest-dataviewer:
+    name: Pytest Dataviewer Backend
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: data-management/viewer/backend
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Python
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        with:
+          python-version: '3.11'
+
+      - name: Setup uv
+        uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7.6.0
+
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends ffmpeg
+
+      - name: Install dependencies
+        run: uv sync --extra dev --extra analysis --extra hdf5 --extra export --extra auth
+
+      - name: Run pytest with coverage
+        run: uv run pytest -v --cov=src --cov-report=xml --cov-report=term-missing
+
+      - name: Upload coverage.xml artifact
+        if: ${{ inputs.code-coverage && always() }}
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: pytest-dataviewer-coverage-xml
+          path: data-management/viewer/backend/coverage.xml
+          retention-days: 30
+
+      - name: Upload coverage to Codecov
+        if: ${{ inputs.code-coverage && always() }}
+        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5.5.2
+        with:
+          files: coverage.xml
+          use_oidc: true
+          fail_ci_if_error: false
+          verbose: true
+          flags: pytest-dataviewer
+          name: pytest-dataviewer-coverage
diff --git a/.github/workflows/dataviewer-frontend-tests.yml b/.github/workflows/dataviewer-frontend-tests.yml
index 18e82ef8..3e1b47cc 100644
--- a/.github/workflows/dataviewer-frontend-tests.yml
+++ b/.github/workflows/dataviewer-frontend-tests.yml
@@ -2,19 +2,13 @@ name: Dataviewer Frontend Tests
 
 on:
   workflow_call:
-    inputs:
-      soft-fail:
-        description: 'Whether to continue on test or lint failures'
-        required: false
-        type: boolean
-        default: false
 
 permissions:
   contents: read
 
 jobs:
   frontend-checks:
-    name: Lint, Type-check & Test
+    name: Lint, Type-check, Test and Build
     runs-on: ubuntu-latest
     defaults:
       run:
@@ -23,7 +17,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v4.2.2
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
         with:
           persist-credentials: false
 
@@ -38,44 +32,16 @@ jobs:
         run: npm ci
 
       - name: ESLint
-        id: lint
-        continue-on-error: true
-        run: npm run lint 2>&1 | tee lint-results.txt
+        run: npm run lint
 
       - name: Type check
-        id: typecheck
-        continue-on-error: true
-        run: npm run type-check 2>&1 | tee typecheck-results.txt
+        run: npm run type-check
 
       - name: Format check
-        id: format
-        continue-on-error: true
-        run: npm run format 2>&1 | tee format-results.txt
+        run: npm run format
 
       - name: Unit tests
-        id: tests
-        continue-on-error: true
-        run: npm run test 2>&1 | tee test-results.txt
+        run: npm run test
 
-      - name: Upload results
-        if: always()
-        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f  # v4.4.3
-        with:
-          name: frontend-test-results
-          path: |
-            data-management/viewer/frontend/lint-results.txt
-            data-management/viewer/frontend/typecheck-results.txt
-            data-management/viewer/frontend/format-results.txt
-            data-management/viewer/frontend/test-results.txt
-          retention-days: 30
-
-      - name: Fail job if errors found
-        if: >-
-          (steps.lint.outcome == 'failure'
-          || steps.typecheck.outcome == 'failure'
-          || steps.format.outcome == 'failure'
-          || steps.tests.outcome == 'failure')
-          && !inputs.soft-fail
-        run: |
-          echo "::error::Frontend checks failed. Run 'npm run lint', 'npm run type-check', 'npm run format', and 'npm run test' locally to reproduce."
-          exit 1
+      - name: Build
+        run: npm run build
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 94bbbce6..62fa3c12 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -106,6 +106,23 @@ jobs:
       contents: read
       id-token: write
 
+  # Dataviewer frontend lint, type-check, and build
+  dataviewer-frontend-tests:
+    name: Dataviewer Frontend Tests
+    uses: ./.github/workflows/dataviewer-frontend-tests.yml
+    permissions:
+      contents: read
+
+  # Dataviewer backend pytest execution
+  dataviewer-backend-pytests:
+    name: Dataviewer Backend Pytest
+    uses: ./.github/workflows/dataviewer-backend-pytests.yml
+    with:
+      code-coverage: true
+    permissions:
+      contents: read
+      id-token: write
+
   # Python linting using ruff
   python-lint:
     name: Python Lint
@@ -154,6 +171,8 @@ jobs:
       - dependency-pinning
       - pester-tests
       - pytest-tests
+      - dataviewer-frontend-tests
+      - dataviewer-backend-pytests
       - python-lint
       - terraform-lint
       - terraform-validation
diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index 40befbd1..2c7b9ca9 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -131,6 +131,17 @@ jobs:
     permissions:
       contents: read
       id-token: write
+
+  # Dataviewer backend pytest execution
+  dataviewer-backend-pytests:
+    name: Dataviewer Backend Pytest
+    uses: ./.github/workflows/dataviewer-backend-pytests.yml
+    with:
+      code-coverage: true
+    permissions:
+      contents: read
+      id-token: write
+
   # Python linting using ruff
   python-lint:
     name: Python Lint
diff --git a/codecov.yml b/codecov.yml
index bba7dc6a..830305c7 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -27,6 +27,11 @@ coverage:
           - pytest
         target: auto
         threshold: 1%
+      pytest-dataviewer:
+        flags:
+          - pytest-dataviewer
+        target: auto
+        threshold: 1%
     patch:
       default:
         target: auto
@@ -41,6 +46,10 @@ flags:
     paths:
       - src/
     carryforward: true
+  pytest-dataviewer:
+    paths:
+      - data-management/viewer/backend/src/
+    carryforward: true
 
 parsers:
   jacoco:
diff --git a/data-management/viewer/backend/pyproject.toml b/data-management/viewer/backend/pyproject.toml
index 659d610b..34e83405 100644
--- a/data-management/viewer/backend/pyproject.toml
+++ b/data-management/viewer/backend/pyproject.toml
@@ -17,6 +17,7 @@ dev = [
     "ruff>=0.8.0",
     "pytest>=8.3.0",
     "pytest-asyncio>=0.24.0",
+    "pytest-cov>=6.0.0",
     "httpx>=0.28.0",
 ]
 azure = [
diff --git a/data-management/viewer/backend/tests/test_dataset_service.py b/data-management/viewer/backend/tests/test_dataset_service.py
index feb8530b..e87c2744 100644
--- a/data-management/viewer/backend/tests/test_dataset_service.py
+++ b/data-management/viewer/backend/tests/test_dataset_service.py
@@ -653,4 +653,10 @@ async def upload_video(self, dataset_id: str, camera: str, episode_idx: int, cac
 
         service._upload_video_to_blob("dataset\r\nname", 7.0, "cam0", tmp_path / "video.mp4")
 
-        assert logged == [("Blob upload failed for %s ep %d: %s", "datasetname", 7, "upload failed")]
+        assert len(logged) == 1
+        message, ds_id, ep_idx, exc = logged[0]
+        assert message == "Blob upload failed for %s ep %d: %s"
+        assert ds_id == "datasetname"
+        assert ep_idx == 7
+        assert isinstance(exc, RuntimeError)
+        assert str(exc) == "upload failed"