diff --git a/.github/workflows/ci-pytest.yml b/.github/workflows/ci-pytest.yml
index 3a9b5b5..80048f2 100644
--- a/.github/workflows/ci-pytest.yml
+++ b/.github/workflows/ci-pytest.yml
@@ -11,17 +11,25 @@ env:
 jobs:
     tests:
         runs-on: ubuntu-latest
+        strategy:
+          matrix:
+            python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
         steps:
-          - uses: actions/checkout@v3
+          - uses: actions/checkout@v4
+
           - name: Build Docker images
             run: |
-              docker compose -f docker-compose-test.yml build
+              PYTHON_VERSION=${{ matrix.python-version }} docker compose -f docker-compose-test.yml build
+
           - name: Run Docker Compose containers
             run: |
-              docker compose -f docker-compose-test.yml up -d
+              PYTHON_VERSION=${{ matrix.python-version }} docker compose -f docker-compose-test.yml up -d
+
           - name: Run Pytest unit tests within Compose
             run: |
-              docker compose -f docker-compose-test.yml exec web bash -c "tox"
+              docker compose -f docker-compose-test.yml exec web pytest
+
           - name: Stop Docker Compose containers
             if: always()
             run: docker compose -f docker-compose.yml down
\ No newline at end of file
diff --git a/catchpy/consumer/tests/test_middleware.py b/catchpy/consumer/tests/test_middleware.py
index 65edfdc..19f9803 100644
--- a/catchpy/consumer/tests/test_middleware.py
+++ b/catchpy/consumer/tests/test_middleware.py
@@ -1,9 +1,11 @@
 from datetime import datetime, timedelta
-from zoneinfo import ZoneInfo
-
 import pytest
 from django.http import HttpResponse
 from django.test import RequestFactory
+try:
+    from zoneinfo import ZoneInfo
+except ImportError:
+    from backports.zoneinfo import ZoneInfo
 
 from ..catchjwt import decode_token, encode_catchjwt, validate_token
 from ..jwt_middleware import (
diff --git a/docker-compose-test.yml b/docker-compose-test.yml
index a7f26dd..b8de7be 100644
--- a/docker-compose-test.yml
+++ b/docker-compose-test.yml
@@ -12,6 +12,8 @@ services:
     build: 
       context: .
       dockerfile: test.Dockerfile
+      args:
+        PYTHON_VERSION: ${PYTHON_VERSION}
     image: hx/catchpy:test
     command: ["./wait-for-it.sh", "db:5432", "--", "python", "manage.py", "runserver", "0.0.0.0:8000"]
     volumes:
diff --git a/test.Dockerfile b/test.Dockerfile
index 54c4cc5..1216bd0 100644
--- a/test.Dockerfile
+++ b/test.Dockerfile
@@ -1,27 +1,13 @@
-FROM python:3.11
+# pass in Python version as build arg to allow for tests to be run on multiple versions of Python
+ARG PYTHON_VERSION=3.11
+FROM python:${PYTHON_VERSION}
+ENV PYTHONUNBUFFERED 1
 ENV PYTHONUNBUFFERED 1
-
-RUN apt-get update
 
 # Include fortune library for quote generation for text annotations
-RUN apt-get install fortune-mod -y
+RUN apt-get update && apt-get install -y fortune-mod
 ENV PATH "$PATH:/usr/games"
 
-# Install all other versions of Python we want to test with tox
-RUN git clone https://github.com/pyenv/pyenv /root/.pyenv
-RUN for PYTHON_VERSION in 3.8.19 3.9.19 3.10.14 3.11.9 3.12.3; do \
-  set -ex \
-    && /root/.pyenv/bin/pyenv install ${PYTHON_VERSION} \
-    && /root/.pyenv/versions/${PYTHON_VERSION}/bin/python -m pip install --upgrade pip \
-  ; done
-
-# Add to PATH, in order of lowest precedence to highest.
-ENV PATH /root/.pyenv/versions/3.8.19/bin:${PATH}
-ENV PATH /root/.pyenv/versions/3.9.19/bin:${PATH}
-ENV PATH /root/.pyenv/versions/3.10.14/bin:${PATH}
-ENV PATH /root/.pyenv/versions/3.12.3/bin:${PATH}
-ENV PATH /root/.pyenv/versions/3.11.9/bin:${PATH}
-
 RUN mkdir /code
 WORKDIR /code
 ADD . /code