diff --git a/.github/workflows/publish_pypi.yml b/.github/workflows/publish_pypi.yml
new file mode 100644
index 00000000..7c4f64d5
--- /dev/null
+++ b/.github/workflows/publish_pypi.yml
@@ -0,0 +1,20 @@
+---
+name: PyPI
+on: push
+
+jobs:
+  build-n-publish:
+    name: Build and publish Python distribution to PyPI
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+      - name: Build a binary wheel and a source tarball
+        run: |
+          python -mpip install wheel
+          python setup.py sdist bdist_wheel
+      - name: Publish distribution to PyPI
+        if: startsWith(github.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@v1.3.0
+        with:
+          password: ${{ secrets.PYPI_PASSWORD }}
diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
new file mode 100644
index 00000000..4f6062c3
--- /dev/null
+++ b/.github/workflows/tox.yml
@@ -0,0 +1,32 @@
+---
+name: Tox
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    name: Run tox tests
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - '3.6'
+          - '3.7'
+          - '3.8'
+          - '3.9'
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: python -mpip install --upgrade wheel pytest tox
+      - name: Get tox target
+        id: toxtarget
+        run: |
+          py=$(echo ${{ matrix.python-version }} | tr -d .)
+          echo "::set-output name=py::$py"
+      - name: Run tests
+        run: tox -e py${{ steps.toxtarget.outputs.py }}
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index d6f56655..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,29 +0,0 @@
----
-language: python
-dist: bionic
-sudo: required
-python: 3.6
-
-before_install:
-  - pip3 install https://github.com/ome/zeroc-ice-ubuntu1804/releases/download/0.3.0/zeroc_ice-3.6.5-cp36-cp36m-linux_x86_64.whl
-  - pip3 install omero-py
-  - pip3 install flake8
-  - pip3 install -U setuptools
-  - flake8 .
-
-script:
-  - python3 setup.py test --pytest-args='-v -v'
-  - python3 setup.py sdist install --record files.txt
-  - python3 -c 'import omero.clients; import omero_marshal.encode'
-  - cat files.txt | xargs rm -rf
-  - python3 setup.py bdist_egg
-  - easy_install dist/*.egg
-  - python3 -c 'import omero.clients; import omero_marshal.encode'
-
-deploy:
-  provider: pypi
-  user: $PYPI_USER
-  password: $PYPI_PASSWORD
-  distributions: sdist bdist_wheel
-  on:
-    tags: true
diff --git a/README.rst b/README.rst
index 1a820b2d..8656f32a 100644
--- a/README.rst
+++ b/README.rst
@@ -1,5 +1,5 @@
-.. image:: https://travis-ci.org/ome/omero-marshal.png
-   :target: https://travis-ci.org/ome/omero-marshal
+.. image:: https://github.com/ome/omero-marshal/workflows/Tox/badge.svg
+    :target: https://github.com/ome/omero-marshal/actions
 
 .. image:: https://img.shields.io/pypi/v/omero-marshal.svg
    :alt: PyPI
diff --git a/tests/unit/conftest.py b/tests/unit/conftest.py
index 008bae10..e227794a 100644
--- a/tests/unit/conftest.py
+++ b/tests/unit/conftest.py
@@ -484,7 +484,7 @@ def roi_with_shapes_and_annotations(roi, ellipse, rectangle):
     return roi
 
 
-def populate_shape(o, set_unit_attributes=True):
+def populate_shape(o, transform, set_unit_attributes=True):
     o.fillColor = rint(0xffffffff)
     o.fillRule = rstring('solid')
     o.fontFamily = rstring('cursive')
@@ -503,11 +503,10 @@ def populate_shape(o, set_unit_attributes=True):
     o.theC = rint(1)
     o.theT = rint(2)
     o.theZ = rint(3)
-    t = identity_transform()
     if SCHEMA_VERSION == '2015-01':
-        o.transform = t.svg_transform
+        o.transform = transform.svg_transform
     else:
-        o.transform = t
+        o.transform = transform
     return o
 
 
@@ -576,9 +575,9 @@ def scale_transform():
 
 
 @pytest.fixture()
-def ellipse():
+def ellipse(identity_transform):
     o = EllipseI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     if SCHEMA_VERSION == '2015-01':
         o.cx = rdouble(1.0)
         o.cy = rdouble(2.0)
@@ -594,16 +593,16 @@ def ellipse():
 
 
 @pytest.fixture()
-def ellipse_with_annotations():
-    o = ellipse()
+def ellipse_with_annotations(ellipse):
+    o = ellipse
     add_annotations(o)
     return o
 
 
 @pytest.fixture()
-def rectangle():
+def rectangle(identity_transform):
     o = RectangleI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     o.x = rdouble(1.0)
     o.y = rdouble(2.0)
     o.width = rdouble(3.0)
@@ -613,9 +612,9 @@ def rectangle():
 
 
 @pytest.fixture()
-def point():
+def point(identity_transform):
     o = PointI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     if SCHEMA_VERSION == '2015-01':
         o.cx = rdouble(1.0)
         o.cy = rdouble(2.0)
@@ -627,9 +626,9 @@ def point():
 
 
 @pytest.fixture()
-def label():
+def label(identity_transform):
     o = LabelI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     o.x = rdouble(1.0)
     o.y = rdouble(2.0)
     o.id = rlong(7)
@@ -637,9 +636,9 @@ def label():
 
 
 @pytest.fixture()
-def polyline():
+def polyline(identity_transform):
     o = PolylineI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     o.points = rstring('0,0 1,2 3,5')
     if SCHEMA_VERSION != '2015-01':
         o.setMarkerStart('Arrow')
@@ -649,18 +648,18 @@ def polyline():
 
 
 @pytest.fixture()
-def polygon():
+def polygon(identity_transform):
     o = PolygonI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     o.points = rstring('0,0 1,2 3,5')
     o.id = rlong(5)
     return o
 
 
 @pytest.fixture()
-def line():
+def line(identity_transform):
     o = LineI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     o.setX1(0)
     o.setY1(0)
     o.setX2(1)
@@ -673,9 +672,9 @@ def line():
 
 
 @pytest.fixture()
-def opt_unit_label():
+def opt_unit_label(identity_transform):
     o = LabelI()
-    populate_shape(o, False)
+    populate_shape(o, identity_transform, False)
     o.x = rdouble(1.0)
     o.y = rdouble(2.0)
     o.id = rlong(7)
@@ -683,9 +682,9 @@ def opt_unit_label():
 
 
 @pytest.fixture()
-def mask():
+def mask(identity_transform):
     o = MaskI()
-    populate_shape(o)
+    populate_shape(o, identity_transform)
     o.x = rdouble(0.0)
     o.y = rdouble(0.0)
     o.width = rdouble(1.0)
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 00000000..48a575bb
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,30 @@
+[tox]
+envlist = py36, py37, py38, py39
+# https://tox.readthedocs.io/en/latest/config.html#conf-requires
+# Ensure pip is new enough
+requires = pip >= 19.0.0
+           virtualenv >= 16.0.0
+
+[testenv]
+# For environment markers see
+# https://www.python.org/dev/peps/pep-0508/#environment-markers
+deps =
+    flake8
+    omero-py
+    pytest-rerunfailures
+    pytest-xdist
+    restructuredtext-lint
+    https://github.com/ome/zeroc-ice-py-github-ci/releases/download/0.1.0/zeroc_ice-3.6.5-cp36-cp36m-linux_x86_64.whl; platform_system=="Linux" and python_version=="3.6"
+    https://github.com/ome/zeroc-ice-py-github-ci/releases/download/0.1.0/zeroc_ice-3.6.5-cp37-cp37m-linux_x86_64.whl; platform_system=="Linux" and python_version=="3.7"
+    https://github.com/ome/zeroc-ice-py-github-ci/releases/download/0.1.0/zeroc_ice-3.6.5-cp38-cp38-linux_x86_64.whl; platform_system=="Linux" and python_version=="3.8"
+    https://github.com/ome/zeroc-ice-py-github-ci/releases/download/0.1.0/zeroc_ice-3.6.5-cp39-cp39-linux_x86_64.whl; platform_system=="Linux" and python_version=="3.9"
+commands =
+    rst-lint README.rst
+    flake8 .
+    python setup.py sdist install --record files.txt
+    python -c 'import omero.clients; import omero_marshal.encode'
+    pytest {posargs:-n4 -rf tests -s}
+    sh -c 'cat files.txt | xargs rm -rf'
+    python setup.py bdist_egg
+    sh -c 'easy_install dist/*.egg'
+    python -c 'import omero.clients; import omero_marshal.encode'