diff --git a/.github/workflows/plone-package.yml b/.github/workflows/plone-package.yml
index b5cca6d..2864464 100644
--- a/.github/workflows/plone-package.yml
+++ b/.github/workflows/plone-package.yml
@@ -13,6 +13,7 @@ env:
   SALESFORCE_USERNAME: test@example.com
   SALESFORCE_PASSWORD: bogus
   SALESFORCE_TOKEN: bogus
+  SALESFORCE_DOMAIN: login
 
 jobs:
   build:
@@ -23,10 +24,6 @@ jobs:
         include:
           - python-version: 3.9
             plone-version: 52
-          - python-version: 2.7
-            plone-version: 52
-          - python-version: 2.7
-            plone-version: 51
     steps:
       - uses: actions/checkout@v2
       - uses: actions/cache@v2
@@ -35,7 +32,7 @@ jobs:
             ~/.cache/pip
             ~/buildout-cache
             ~/extends
-          key: ${{ runner.os }}-deps-cache-${{ hashFiles('**/setup.py') }}-${{ hashFiles('**/*.cfg') }} }}
+          key: ${{ runner.os }}-deps-cache-${{ hashFiles('setup.py') }}-${{ hashFiles('*.cfg') }} }}
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:
@@ -55,3 +52,40 @@ jobs:
         run: buildout -c test_plone${{ matrix.plone-version }}.cfg
       - name: Run tests
         run: bin/test
+
+  build-py27:
+    runs-on: ubuntu-20.04
+    container:
+      image: python:2.7.18-buster
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - python-version: 2.7
+            plone-version: 52
+          - python-version: 2.7
+            plone-version: 51
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cache/pip
+            ~/buildout-cache
+            ~/extends
+          key: ${{ runner.os }}-deps-cache-${{ hashFiles('setup.py') }}-${{ hashFiles('*.cfg') }} }}
+      - name: Install system libraries
+        run: apt-get install libxml2-dev libxslt1-dev libjpeg-dev
+      - name: setup buildout cache
+        run: |
+          mkdir -p ~/buildout-cache/{eggs,downloads}
+          mkdir ~/.buildout
+          echo "[buildout]" > $HOME/.buildout/default.cfg
+          echo "download-cache = $HOME/buildout-cache/downloads" >> $HOME/.buildout/default.cfg
+          echo "eggs-directory = $HOME/buildout-cache/eggs" >> $HOME/.buildout/default.cfg
+      - name: Install pip and zc.buildout
+        run: python -m pip install --upgrade pip wheel zc.buildout setuptools -c constraints_plone${{ matrix.plone-version }}.txt
+      - name: Run buildout
+        run: buildout -c test_plone${{ matrix.plone-version }}.cfg
+      - name: Run tests
+        run: bin/test
diff --git a/src/jazkarta/easyformplugin/salesforce/testing.py b/src/jazkarta/easyformplugin/salesforce/testing.py
index 3dae10a..2c01c2a 100644
--- a/src/jazkarta/easyformplugin/salesforce/testing.py
+++ b/src/jazkarta/easyformplugin/salesforce/testing.py
@@ -57,7 +57,7 @@ def setUpPloneSite(self, portal):
 def scrub_login_request(request):
     if request.body is not None:
         request.body = re.sub(
-            rb"<n1:(username|password)>.*?</n1:\1>",
+            br"<n1:(username|password)>.*?</n1:\1>",
             lambda m: b"<n1:" + m.group(1) + b">REDACTED</n1:" + m.group(1) + b">",
             request.body,
         )
@@ -66,7 +66,7 @@ def scrub_login_request(request):
 
 def scrub_login_response(response):
     response["body"]["string"] = re.sub(
-        rb"<sessionId>.*?</sessionId>",
+        br"<sessionId>.*?</sessionId>",
         b"<sessionId>FAKE_SESSION</sessionId>",
         response["body"]["string"],
     )