diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ba7e274..489c0d9 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -9,7 +9,7 @@ jobs:
       fail-fast: true
       matrix:
         os: ["ubuntu-latest"]
-        python-version: ["3.7", "3.8", "3.9"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
       - name: Checkout source
diff --git a/rpi_hardware_pwm/__init__.py b/rpi_hardware_pwm/__init__.py
index bc9d8be..495376c 100644
--- a/rpi_hardware_pwm/__init__.py
+++ b/rpi_hardware_pwm/__init__.py
@@ -36,6 +36,7 @@ class HardwarePWM:
 
     _duty_cycle: float
     _hz: float
+    chippath: str = "/sys/class/pwm/pwmchip0" # mostly here for testing
 
     def __init__(self, pwm_channel: int, hz: float, chip: int = 0) -> None:
 
diff --git a/setup.py b/setup.py
index 58b80a9..e944655 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
 setup(
     name="rpi_hardware_pwm",
     packages=find_packages('.'),
-    version='0.2.1',
+    version='0.2.2',
     license='OSI Approved :: GNU General Public License v3 (GPLv3)',
     description='Control Hardware PWM on the Raspberry Pi',
     long_description = long_description,