diff --git a/.cirrus.yml b/.cirrus.yml
index 1f03e32ee..34cb5e60f 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -17,9 +17,15 @@ task:
        - env:
            ELECTRUM_PYTHON_VERSION: 3.10
        - env:
-           ELECTRUM_PYTHON_VERSION: 3
+           ELECTRUM_PYTHON_VERSION: 3.11
        - env:
            ELECTRUM_PYTHON_VERSION: rc
+       - name: Tox Python 3 debug mode
+         env:
+           ELECTRUM_PYTHON_VERSION: 3
+           # enable additional checks:
+           PYTHONASYNCIODEBUG: "1"
+           PYTHONDEVMODE: "1"
     - name: Tox PyPy
       allow_failures: true
       env:
@@ -38,6 +44,8 @@ task:
     - apt-get -y install libsecp256k1-0
     - pip install -r $ELECTRUM_REQUIREMENTS_CI
   tox_script:
+    - export PYTHONASYNCIODEBUG
+    - export PYTHONDEVMODE
     - tox
   coveralls_script:
     - if [ ! -z "$COVERALLS_REPO_TOKEN" ] ; then coveralls ; fi
diff --git a/tox.ini b/tox.ini
index f36336f92..367518c06 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,9 @@
 deps=
 	pytest
 	coverage
+passenv=
+	PYTHONASYNCIODEBUG
+	PYTHONDEVMODE
 commands=
 	coverage run --source=electrum '--omit=electrum/gui/*,electrum/plugins/*,electrum/scripts/*,electrum/tests/*' -m pytest -v
 	coverage report