diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b344c2..45f4f89 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,6 +50,46 @@ jobs:
         file: ./coverage.xml
         flags: unittests
 
+  test-ROOT-6_22-Py-3_8:
+
+    runs-on: ubuntu-latest
+    container: pyhf/pyhf-validation-root-base:root6.22.02-python3.8
+
+    steps:
+    - uses: actions/checkout@master
+    - name: Install utilities
+      # git init done as the .git directory seems
+      # to be missing after the checkout
+      run: |
+        apt-get -qq -y update
+        apt-get -qq -y install shellcheck
+        git init .
+    - name: Lint with Shellcheck
+      run: |
+        shellcheck tests/*.sh
+        shellcheck scripts/*.sh
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade --no-cache-dir pip setuptools wheel
+        python -m pip install --quiet --no-cache-dir --editable .[complete]
+        python -m pip list
+    - name: Test with pytest
+      run: |
+        python -m pytest -r sx tests
+    - name: Generate ROOT workspace from JSON
+      run: |
+        bash scripts/JSON_to_workspace.sh \
+          sbottom-pallet \
+          https://www.hepdata.net/record/resource/1408070?view=true \
+          RegionA/BkgOnly.json \
+          sbottom_1300_205_60 \
+          RegionA/workspace_sbottom_1300_205_60.json
+    - name: Test workspace comparison
+      run: |
+        bash tests/test_suite.sh \
+          sbottom-pallet/xml/config/FitConfig_combined_NormalMeasurement_model.root \
+          sbottom-pallet/RegionA/workspace_sbottom_1300_205_60.json
+
   docker:
 
     runs-on: ubuntu-latest
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index e38768b..3a7b5c6 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -22,7 +22,7 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
         repository: pyhf/pyhf-validation
         dockerfile: docker/Dockerfile
-        tags: latest,root6.20.00,root6.20.00-python3.7
+        tags: latest,root6.22.02,root6.22.02-python3.8
     - name: Build and Publish to Registry with Release Tag
       if: startsWith(github.ref, 'refs/tags/')
       uses: docker/build-push-action@v1
@@ -31,5 +31,5 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
         repository: pyhf/pyhf-validation
         dockerfile: docker/Dockerfile
-        tags: latest,latest-stable,root6.20.00,root6.20.00-python3.7
+        tags: latest,latest-stable,root6.22.02,root6.22.02-python3.8
         tag_with_ref: true
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 722d398..d97d4a4 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM pyhf/pyhf-validation-root-base:root6.20.00-python3.7 as base
+FROM pyhf/pyhf-validation-root-base:root6.22.02-python3.8 as base
 
 FROM base as builder
 COPY . /code
diff --git a/scripts/JSON_to_workspace.sh b/scripts/JSON_to_workspace.sh
new file mode 100644
index 0000000..f0b8458
--- /dev/null
+++ b/scripts/JSON_to_workspace.sh
@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+
+set -e
+
+function JSON_to_workspace() {
+  # 1: the analysis pallet name
+  # 2: the url of the JSON workspaces
+  # 3: the background only workspace
+  # 4: the name of the signal patch
+  # 5: the patched background + signal workspace
+  local PALLET_NAME=$1
+  local HEPDATA_URL=$2
+  local BACKGROUND_ONLY=$3
+  local PATCH_NAME=$4
+  local JSON_WORKSPACE=$5
+
+  # Download from HEPData
+  pyhf contrib download "${HEPDATA_URL}" "${PALLET_NAME}"
+
+  # Create a full signal+background workspace
+  workspace_dir="${BACKGROUND_ONLY%/*}"
+  pyhf patchset extract \
+    --name "${PATCH_NAME}" \
+    --output-file "${PALLET_NAME}/${workspace_dir}/${PATCH_NAME}.json" \
+    "${PALLET_NAME}/${workspace_dir}/patchset.json"
+  jsonpatch \
+    "${PALLET_NAME}/${BACKGROUND_ONLY}" \
+    "${PALLET_NAME}/${workspace_dir}/${PATCH_NAME}.json" > \
+    "${PALLET_NAME}/${JSON_WORKSPACE}"
+
+  # Convert to ROOT + XML
+  if [[ -d "${PALLET_NAME}/xml" ]]; then
+    rm -rf "${PALLET_NAME}/xml"
+  fi
+  mkdir "${PALLET_NAME}/xml"
+  pyhf json2xml \
+    --output-dir "${PALLET_NAME}/xml" \
+    "${PALLET_NAME}/${JSON_WORKSPACE}"
+
+  # Generate ROOT workspace
+  hist2workspace "${PALLET_NAME}/xml/FitConfig.xml"
+}
+
+function main() {
+  # 1: the analysis pallet name
+  # 2: the url of the JSON workspaces
+  # 3: the background only workspace
+  # 4: the name of the signal patch
+  # 5: the patched background + signal workspace
+  local PALLET_NAME=$1
+  local HEPDATA_URL=$2
+  local BACKGROUND_ONLY=$3
+  local PATCH_NAME=$4
+  local JSON_WORKSPACE=$5
+
+  JSON_to_workspace "${PALLET_NAME}" "${HEPDATA_URL}" "${BACKGROUND_ONLY}" "${PATCH_NAME}" "${JSON_WORKSPACE}"
+}
+
+main "$@" || exit 1
diff --git a/scripts/compare_fitted_nuisance.py b/scripts/compare_fitted_nuisance.py
index e59e716..a4c0c83 100644
--- a/scripts/compare_fitted_nuisance.py
+++ b/scripts/compare_fitted_nuisance.py
@@ -94,7 +94,7 @@ def exhaust_argset(s):
         pyhf_param = (
             param.replace("alpha_", "")
             .replace("gamma_stat_", "staterror_")
-            .replace("lumi", "Lumi")
+            .replace("Lumi", "lumi")
             .replace("_bin", "")
         )
 
diff --git a/scripts/compare_nuisance.py b/scripts/compare_nuisance.py
index 06dc43b..7701000 100644
--- a/scripts/compare_nuisance.py
+++ b/scripts/compare_nuisance.py
@@ -35,8 +35,7 @@ def exhaust_argset(s):
     pars_root = [
         sub.replace("alpha_", "")
         .replace("gamma_stat_", "staterror_")
-        .replace("gamma_stat_", "staterror_")
-        .replace("lumi", "Lumi")
+        .replace("Lumi", "lumi")
         .replace("_bin", "")
         for sub in pars
     ]