diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
new file mode 100644
index 0000000..64cd658
--- /dev/null
+++ b/.github/workflows/python-package.yml
@@ -0,0 +1,42 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Python package
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install OpenGL (GLU)
+      run: sudo apt-get update && sudo apt-get install -y libglu1-mesa libglu1-mesa-dev
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8 pytest pytest-cov
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Test with pytest
+      run: |
+        VISUALTEST=false PYTHONPATH=${PWD}/src:$PYTHONPATH pytest tests/ -m "not visual"
diff --git a/tests/test_geom.py b/tests/test_geom.py
index 2b96361..43e764e 100644
--- a/tests/test_geom.py
+++ b/tests/test_geom.py
@@ -2,7 +2,6 @@
 import os
 from yapcad.geom import *
 from yapcad.geom_util import *
-from yapcad.pyglet_drawable import *
 
 ## unit tests for yapCAD geom.py
 
@@ -476,6 +475,7 @@ def test_visual_intersect(self):
         """Visual test of intersection calculation - requires display"""
         if not VISUALTEST:
             pytest.skip("Visual tests disabled (set VISUALTEST=true to enable)")
+        from yapcad.pyglet_drawable import *
         dd = pygletDraw()
         dd.linecolor='silver'
         # make a polyline spiral
diff --git a/tests/test_geom3d.py b/tests/test_geom3d.py
index 43c30f9..58e3344 100644
--- a/tests/test_geom3d.py
+++ b/tests/test_geom3d.py
@@ -5,12 +5,13 @@
 from yapcad.geom_util import *
 from yapcad.geom3d import *
 from yapcad.geom3d_util import *
-from yapcad.pyglet_drawable import *
 from yapcad.poly import *
 from yapcad.combine import *
 
 # Control flag for visual tests - set via environment variable or directly
 VISUALTEST = os.environ.get('VISUALTEST', 'false').lower() in ('true', '1', 'yes')
+if VISUALTEST:
+    from yapcad.pyglet_drawable import *
 
 def randomPoints(bbox,numpoints):
     """Given a 3D bounding box and a number of points to generate, 
diff --git a/tests/test_geom_util.py b/tests/test_geom_util.py
index 024dff4..8d12059 100644
--- a/tests/test_geom_util.py
+++ b/tests/test_geom_util.py
@@ -2,7 +2,6 @@
 import os
 from yapcad.geom import *
 from yapcad.geom_util import *
-from yapcad.pyglet_drawable import *
 from yapcad.poly import *
 from yapcad.combine import *
 
@@ -11,6 +10,9 @@
 # Control flag for visual tests - set via environment variable or directly
 VISUALTEST = os.environ.get('VISUALTEST', 'false').lower() in ('true', '1', 'yes')
 
+if VISUALTEST:
+    from yapcad.pyglet_drawable import *
+
 class TestSample:
     """test sampling-related operations"""
 
diff --git a/tests/test_geometry.py b/tests/test_geometry.py
index d7a1340..56c9df8 100644
--- a/tests/test_geometry.py
+++ b/tests/test_geometry.py
@@ -5,13 +5,13 @@
 from yapcad.geom import *
 from yapcad.geom_util import *
 from yapcad.geometry import *
-from yapcad.pyglet_drawable import *
 
 """test functions for the yapcad.geometry module"""
 
 # Control flag for visual tests - set via environment variable or directly
 VISUALTEST = os.environ.get('VISUALTEST', 'false').lower() in ('true', '1', 'yes')
-
+if VISUALTEST:
+    from yapcad.pyglet_drawable import *
 
 class TestGeometry:
     """Tests for the Geometry class"""
diff --git a/tests/test_mesh_view.py b/tests/test_mesh_view.py
index cfa0af0..e608e5a 100644
--- a/tests/test_mesh_view.py
+++ b/tests/test_mesh_view.py
@@ -7,12 +7,11 @@
 from yapcad.geom3d_util import conic, sphere
 from yapcad.geom_util import geomlist2poly, geomlist2poly_components
 from yapcad.mesh import mesh_view
-from yapcad.pyglet_drawable import pygletDraw
 from yapcad.poly import Polygon, Rect
 
-
 VISUALTEST = os.environ.get('VISUALTEST', 'false').lower() in ('true', '1', 'yes')
-
+if VISUALTEST:
+    from yapcad.pyglet_drawable import *
 
 def _strip_w(pt):
     return tuple(round(coord, 6) for coord in pt[:3])
diff --git a/tests/test_octtree.py b/tests/test_octtree.py
index 1393f7b..dc58289 100644
--- a/tests/test_octtree.py
+++ b/tests/test_octtree.py
@@ -3,10 +3,11 @@
 import random
 from yapcad.geom import *
 from yapcad.octtree import *
-from yapcad.pyglet_drawable import *
 
 # Control flag for visual tests - set via environment variable or directly
 VISUALTEST = os.environ.get('VISUALTEST', 'false').lower() in ('true', '1', 'yes')
+if VISUALTEST:
+    from yapcad.pyglet_drawable import *
 
 def three2two(x):
     """take a 3D bounding box with non-zero z coordinates, return