diff --git a/.github/workflows/python-ci-tests.yml b/.github/workflows/python-ci-tests.yml
index 47f860e1..7ecbedb1 100644
--- a/.github/workflows/python-ci-tests.yml
+++ b/.github/workflows/python-ci-tests.yml
@@ -4,12 +4,12 @@ name: cti-python-stix2 test harness
 on: [push, pull_request]
 
 jobs:
-  build:
+  test:
 
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
 
     name: Python ${{ matrix.python-version }} Build
     steps:
@@ -32,3 +32,24 @@ jobs:
         token: ${{ secrets.CODECOV_TOKEN }}
         fail_ci_if_error: false # optional (default = false)
         verbose: true # optional (default = false)
+  
+  publish-to-test-pypi:
+    runs-on: ubuntu-latest
+    needs: test
+
+    permissions:
+      id-token: write
+    
+    steps:
+    - name: Download dist files
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+    - name: Publish to Test PyPI
+      if: ${{ github.event_name == 'push' }}
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+         skip-existing: true
+         repository-url: https://test.pypi.org/legacy/
diff --git a/setup.py b/setup.py
index d0d8fe77..4dfdf8b5 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,8 @@
 #!/usr/bin/env python
 from codecs import open
 import os.path
+import sys
+import pkg_resources
 
 from setuptools import find_packages, setup
 
@@ -22,6 +24,14 @@ def get_long_description():
         return f.read()
 
 
+
+try:
+    pkg_resources.get_distribution("stix2")
+    sys.exit(f"Error: 'stix2' is installed. Uninstall it before proceeding.")
+except pkg_resources.DistributionNotFound:
+    pass
+
+
 setup(
     name='misp-lib-stix2',
     version=get_version(),