diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 9ebc62d5..5be7a45e 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -13,19 +13,19 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Cache Python packages
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/.cache/pip
         key: ${{ runner.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('setup.py') }}
         restore-keys: |
           ${{ runner.os }}-py${{ matrix.python-version }}-pip-
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install gfortran  # required by camb
@@ -37,17 +37,24 @@ jobs:
         python -m pip install --upgrade pip
         pip install wheel
         pip install .[full]
+    - name: Get changed python files
+      id: changed_python_files
+      uses: tj-actions/changed-files@v20
+      with:
+        files: "*.py"
     - name: Lint with flake8
+      if: steps.changed_python_files.outputs.any_changed == 'true'
       run: |
         pip install flake8
         # stop the build if there are Python syntax errors or undefined names
-        flake8 descqa descqagen descqaweb descqarun tests --count --select=E9,F63,F7,F82 --show-source --statistics
+        flake8 ${{ steps.changed_python_files.outputs.all_changed_and_modified_files }} --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 descqa descqagen descqaweb descqarun tests --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        flake8 ${{ steps.changed_python_files.outputs.all_changed_and_modified_files }} --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Lint with pylint
+      if: steps.changed_python_files.outputs.any_changed == 'true'
       run: |
         pip install pylint
-        pylint --disable=all --enable=F,E,unreachable,duplicate-key,unnecessary-semicolon,global-variable-not-assigned,unused-variable,binary-op-exception,bad-format-string,anomalous-backslash-in-string,bad-open-mode --extension-pkg-whitelist=numpy descqa descqagen descqaweb descqarun
+        pylint --disable=all --enable=F,E,unreachable,duplicate-key,unnecessary-semicolon,global-variable-not-assigned,unused-variable,binary-op-exception,bad-format-string,anomalous-backslash-in-string,bad-open-mode --extension-pkg-whitelist=numpy ${{ steps.changed_python_files.outputs.all_changed_and_modified_files }}
     - name: Test with pytest
       run: |
         pip install pytest