diff --git a/.github/workflows/core.yml b/.github/workflows/core.yml
index 445e6e0e..c7c020a3 100644
--- a/.github/workflows/core.yml
+++ b/.github/workflows/core.yml
@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, windows-latest, macos-latest]
-        python-version: ["3.6", "3.9", "3.11"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
 
     runs-on: ${{ matrix.os }}
 
@@ -27,12 +27,17 @@ jobs:
           python -m pip install --upgrade pip
           pip install tox
 
+      - name: Core System Info
+        run: |
+          tox -e py
+
       - name: Python Lint
         if: ${{ matrix.python-version != '3.6' }}
         run: |
           tox -e lint
 
       - name: Integration Tests
+        if: ${{ matrix.python-version == '3.9' }}
         run: |
           tox -e testcore
 
diff --git a/setup.py b/setup.py
index 6d450519..ef9543e3 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,8 @@ minimal_requirements = [
     "click==8.1.*; " + py_gte_37,
     "colorama",
     "marshmallow==3.14.1; " + py_below_37,
-    "marshmallow==3.20.*; " + py_gte_37,
+    "marshmallow==3.19.0; " + py_37,
+    "marshmallow==3.20.*; " + py_gte_38,
     "pyelftools==0.29",
     "pyserial==3.5.*",  # keep in sync "device/monitor/terminal.py"
     "requests==2.*",
diff --git a/tox.ini b/tox.ini
index f8a15f3b..2eda9b90 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,6 +34,7 @@ deps =
     jsondiff
 commands =
     {envpython} --version
+    pio system info
 
 [testenv:lint]
 commands =