diff --git a/.github/workflows/merge-pytest.yml b/.github/workflows/merge-pytest.yml
index 93dd3c85e..1300ea1cb 100644
--- a/.github/workflows/merge-pytest.yml
+++ b/.github/workflows/merge-pytest.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
 
     steps:
     - uses: actions/checkout@v3
@@ -39,7 +39,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
 
     steps:
      - uses: actions/checkout@v3
@@ -67,7 +67,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
 
     steps:
     - uses: actions/checkout@v3
@@ -98,7 +98,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.github/workflows/pr-pytest.yml b/.github/workflows/pr-pytest.yml
index adf7b1b20..6dd608be4 100644
--- a/.github/workflows/pr-pytest.yml
+++ b/.github/workflows/pr-pytest.yml
@@ -98,7 +98,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/pynetdicom/tests/hide_modules.py b/pynetdicom/tests/hide_modules.py
index 4f0c477fb..a77a453ec 100644
--- a/pynetdicom/tests/hide_modules.py
+++ b/pynetdicom/tests/hide_modules.py
@@ -26,13 +26,10 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-import importlib.abc
+from importlib.abc import MetaPathFinder
 
-# py>=3.3 has MetaPathFinder
-_ModuleHiderBase = getattr(importlib.abc, "MetaPathFinder")
 
-
-class ModuleHider(MetaPathFinder)::
+class ModuleHider(MetaPathFinder):
     """Import finder hook to hide specified modules
     ModuleHider(hidden_modules) -> instance
     hidden_modules is a list of strings naming modules to hide.