diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index 6db3a67a..00000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,91 +0,0 @@
-# https://www.appveyor.com/docs/windows-images-software
-
-image: Visual Studio 2022
-
-environment:
-  global:
-    REPO_DIR: python-appveyor-demo
-    PACKAGE_NAME: python_appveyor_demo
-    BUILD_COMMIT: master
-    BUILD_DEPENDS: "cython"
-    TEST_DEPENDS: "nose"
-
-  matrix:
-    - PYTHON: "C:\\Miniconda37"
-      PYTHON_VERSION: "3.7"
-      PYTHON_ARCH: "32"
-    - PYTHON: "C:\\Miniconda37-x64"
-      PYTHON_VERSION: "3.7"
-      PYTHON_ARCH: "64"
-    - PYTHON: "C:\\Miniconda38-x64"
-      PYTHON_VERSION: "3.8"
-      PYTHON_ARCH: "64"
-
-# We always use a 64-bit machine, but can build x86 distributions
-# with the TARGET_ARCH variable.
-platform:
-    - x64
-
-matrix:
-    fast_finish: false
-
-install:
-    # Install miniconda and fix headers
-    - where python
-    - where py  # On Windows, py might be a better way to find and run CPython
-    - py --list  # py -3.10-32, -3.10-64 with same syntax for 3.{9-3}, 2.{7,6}
-    - SET PATH=%PYTHON%;%PYTHON%\Scripts;%PYTHON%\Library\bin;%PATH%
-    - echo %PATH%
-    - where conda
-    - conda info
-
-    # Check that we have the expected version and architecture for Python
-    - python --version
-    - python -c "import struct; print(struct.calcsize('P') * 8)"
-    - py --version
-    - py -c "import struct; print(struct.calcsize('P') * 8)"
-
-    # clone a origsel/python-appveyor-demo
-    # this repo includes a simple package to test appveyor
-    - git clone https://github.com/ogrisel/python-appveyor-demo.git
-
-build_script:
-    # Install build requirements
-    - conda install --yes %BUILD_DEPENDS%
-
-    # build wheel:
-    - cd %REPO_DIR%
-    - git checkout %BUILD_COMMIT%
-    - python setup.py bdist_wheel
-    - ls dist/*
-
-test_script:
-    # create test env
-    - conda create --yes -n test_env python=%PYTHON_VERSION% %TEST_DEPENDS%
-    - activate test_env
-
-    # install from wheel
-    - pip install --no-index --find-links dist/ %PACKAGE_NAME%
-
-    # run tests from install wheel
-    - cd ..
-    - python -m pyappveyordemo.tests.test_extension
-
-    # Smoke test of install_python script
-    # Use C:\PythonXY, C:\PythonXY-x64, C:\PythonXYrcZ, or C:\PythonXYrcZ-x64
-    - set PYTHON=C:\Python37
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python37-x64
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python38-x64
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python38
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python39-x64
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python39
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python310-x64
-    - ps: .\install_python.ps1
-    - set PYTHON=C:\Python310
-    - ps: .\install_python.ps1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f6e31131..269ece9d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,11 +20,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]       # [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.12"]  # ["2.7", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "pypy3"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ["3.13"]  # ["2.7", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "pypy3"]
 
     # The type of runner that the job will run on
     runs-on: ${{ matrix.os }}
+    env:
+      MB_PYTHON_VERSION=3.13
+      TEST_BUILDS=1
+      MB_PYTHON_OSX_VER=10.9
+      ENV_VARS_PATH="test/env_vars.sh
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -36,12 +41,5 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       # Runs a single command using the runner's Python
-      - name: Run a one-line script
-        shell: python
-        run: print("Hello, world!")
-
-      # Runs a set of commands using the runner's shell
-      - name: Run a multi-line script
-        run: |
-          echo Add other actions to build,
-          echo test, and deploy your project.
+      - name: Test
+        run: source tests/test_multibuild.sh
diff --git a/tests/test_fill_submodule.sh b/tests/test_fill_submodule.sh
index 740c5e61..304cede7 100644
--- a/tests/test_fill_submodule.sh
+++ b/tests/test_fill_submodule.sh
@@ -13,7 +13,7 @@ mkdir project
 mkdir superproject
 cd superproject
 git init
-git submodule add ../project
+git -c protocol.file.allow=always submodule add ../project
 local_author
 git commit -m "first superproject"
 # Check the submodule is working correctly before intervention
diff --git a/tests/test_multibuild.sh b/tests/test_multibuild.sh
index f87c158d..e9854fb3 100644
--- a/tests/test_multibuild.sh
+++ b/tests/test_multibuild.sh
@@ -63,5 +63,3 @@ source tests/test_supported_wheels.sh
 
 # Exit 1 if any test errors
 barf
-# Don't need Travis' machinery trace
-set +x