diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index 60d20bfb1..677c341f5 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -20,6 +20,18 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.7.10'  # using SemVer's version range syntax
+          architecture: 'x64'
+
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
       - name: Install Python Packages
         working-directory: ${{ env.working-directory }}
         run: |
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 225c54630..8ebe9aacc 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -31,9 +31,9 @@ jobs:
           path: |
             ./frontend/node_modules
             ./frontend/public
-          key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
           restore-keys: |
-            ${{ runner.os }}-
+            ${{ runner.os }}-yarn-
 
       - name: Install Node packages
         if: steps.cache-yarn.outputs.cache-hit != 'true'
diff --git a/backend/.flake8 b/backend/.flake8
index 0fc03185c..9fff66301 100644
--- a/backend/.flake8
+++ b/backend/.flake8
@@ -2,8 +2,9 @@
 exclude = 
   xss_filter.py,
   */migrations/,
-  *settings.py
-  */apps.py
+  *settings.py,
+  */apps.py,
+  .venv/,
   venv/
 max-line-length = 180
 inline-quotes = "