diff --git a/.github/workflows/oas.yml b/.github/workflows/oas.yml
index 220c2909e..11e933c29 100644
--- a/.github/workflows/oas.yml
+++ b/.github/workflows/oas.yml
@@ -16,158 +16,31 @@ on:
     - cron: '23 19 2,17 * *'
 
 jobs:
-  # --- run OAS unit and regression tests ---
   test:
-    runs-on: ubuntu-latest
     strategy:
-      fail-fast: false  # continue other jobs even if one of the jobs in matrix fails
+      fail-fast: false
       matrix:
-        dep-versions: ["oldest", "latest"]
-        # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Set versions to test here ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-        PYTHON_VERSION_OLDEST: ['3.9']
-        PYTHON_VERSION_LATEST: ['3.11']
-        NUMPY_VERSION_OLDEST: ['1.24']  # latest is most recent on PyPI
-        SCIPY_VERSION_OLDEST: ['1.9']  # latest is most recent on PyPI
-        OPENMDAO_VERSION_OLDEST: ['3.22']  # latest is most recent on PyPI
-        MPHYS_VERSION_OLDEST: ['1.0.0']  # latest is most recent on PyPI
-        PYGEO_VERSION_OLDEST: ['1.6.0']  # latest is pulled from main branch, for some reason anything after 1.12.2 seg faults on the old build
-        VSP_VERSION: ['3.27.1']  # used for both builds
-        PETSC_VERSION_LATEST: ['3.19.1']
-        CYTHON_VERSION: ['0.29.36']  # used for both builds
+        dockerImage: [stable, latest]
 
+    runs-on: ubuntu-latest
+    container: mdolab/public:u22-gcc-ompi-${{ matrix.dockerImage }}-amd64
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.PYTHON_VERSION_OLDEST }}
-      if: ${{ matrix.dep-versions == 'oldest' }}
-      uses: actions/setup-python@v2
-      with:
-        python-version:  ${{ matrix.PYTHON_VERSION_OLDEST }}
-    - name: Set up Python ${{ matrix.PYTHON_VERSION_LATEST }}
-      if: ${{ matrix.dep-versions == 'latest' }}
-      uses: actions/setup-python@v2
-      with:
-        python-version:  ${{ matrix.PYTHON_VERSION_LATEST }}
-
-    # we need OpenVSP to run vsp tests.
-    - name: Install OpenVSP
-      run: |
-        sudo apt-get update
-        export PYTHON_INCLUDE_DIR=$(python -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())")
-        export PYTHON_LIBRARY=$(python -c "import distutils.sysconfig as sysconfig; print(sysconfig.get_config_var('LIBDIR'))")
-        export INST_PREFIX=$(python -c "import distutils.sysconfig as sysconfig; print(sysconfig.get_config_var('prefix'))")
-        cd ..
-        sudo apt-get install cmake libx11-dev libfltk1.3-dev libcpptest-dev libglm-dev libeigen3-dev libcminpack-dev \
-                             libglew-dev doxygen graphviz texlive-latex-base
-        mkdir OpenVSP
-        cd OpenVSP
-        mkdir build buildlibs
-        # Download source code
-        wget -q https://github.com/OpenVSP/OpenVSP/archive/refs/tags/OpenVSP_${{ matrix.VSP_VERSION }}.tar.gz
-        tar -xf OpenVSP_${{ matrix.VSP_VERSION }}.tar.gz
-        mv OpenVSP-OpenVSP_${{ matrix.VSP_VERSION }} repo
-        # Build dependency libs
-        cd buildlibs
-        cmake -DVSP_USE_SYSTEM_LIBXML2=true -DVSP_USE_SYSTEM_FLTK=true -DVSP_USE_SYSTEM_GLM=true \
-              -DVSP_USE_SYSTEM_GLEW=true -DVSP_USE_SYSTEM_CMINPACK=true -DVSP_USE_SYSTEM_LIBIGES=false \
-              -DVSP_USE_SYSTEM_EIGEN=false -DVSP_USE_SYSTEM_CODEELI=false -DVSP_USE_SYSTEM_CPPTEST=false \
-              -DPYTHON_INCLUDE_DIR=${PYTHON_INCLUDE_DIR} -DPYTHON_LIBRARY=${PYTHON_LIBRARY} ../repo/Libraries -DCMAKE_BUILD_TYPE=Release
-        make -j8
-        # Build OpenVSP
-        cd ..
-        export BUILD_LIBS_PATH=`pwd`
-        cd build
-        cmake ../repo/src/ -DVSP_NO_GRAPHICS=true -DVSP_LIBRARY_PATH=${BUILD_LIBS_PATH}/buildlibs \
-              -DPYTHON_INCLUDE_DIR=${PYTHON_INCLUDE_DIR} -DPYTHON_LIBRARY=${PYTHON_LIBRARY} \
-              -DCMAKE_BUILD_TYPE=Release
-        make -j8
-        make package
-        # Install python interface
-        pushd _CPack_Packages/Linux/ZIP/OpenVSP-${{ matrix.VSP_VERSION }}-Linux/python
-        pip install -r requirements.txt
-        pushd ..
-        cp vspaero vspscript vspslicer $INST_PREFIX/bin
-        popd
-        popd
-
-    # OAS dependencies are specified in setup.py.
-    - name: Install OAS and its dependencies (oldest versions)
-      if: ${{ matrix.dep-versions == 'oldest' }}
-      run: |
-        pip install numpy==${{ matrix.NUMPY_VERSION_OLDEST }} scipy==${{ matrix.SCIPY_VERSION_OLDEST }} openmdao==${{ matrix.OPENMDAO_VERSION_OLDEST }} mphys==${{ matrix.MPHYS_VERSION_OLDEST }}
-        pip install -e .[test]
-    - name: Install OAS and its dependencies (latest versions)
-      if: ${{ matrix.dep-versions == 'latest' }}
-      run: |
-        python -m pip install --upgrade pip wheel
-        pip install -e .[test,mphys]
-
-    - name: Install MPI
-      run: |
-        sudo apt-get install openmpi-bin libopenmpi-dev
-        pip install mpi4py
-
-    # install PETSc on the latest for MPI tests
-    - name: Install PETSc
-      if: ${{ matrix.dep-versions == 'latest' }}
-      run: |
-        cd ..
-        pip download petsc==${{ matrix.PETSC_VERSION_LATEST }}
-        tar -xf petsc-${{ matrix.PETSC_VERSION_LATEST }}.tar.gz
-        cd petsc-${{ matrix.PETSC_VERSION_LATEST }}
-        export PETSC_ARCH=real-debug
-        export PETSC_DIR=`pwd`
-        ./configure --PETSC_ARCH=$PETSC_ARCH --download-fblaslapack
-        make PETSC_DIR=$PETSC_DIR PETSC_ARCH=$PETSC_ARCH all
-        # Cython 3.0.0 break petsc4py install
-        pip install cython==${{ matrix.CYTHON_VERSION }}
-        pip install petsc4py==${{ matrix.PETSC_VERSION_LATEST }}
-
-    # We need pySpline/pyGeo to run FFD tests.
-    - name: Install pySpline
-      run: |
-        cd ..
-        git clone https://github.com/mdolab/pyspline.git
-        cd pyspline
-        cp config/defaults/config.LINUX_GFORTRAN.mk config/config.mk
-        make
-        pip install -e .
-
-    - name: Install pyGeo ${{ matrix.PYGEO_VERSION_OLDEST }}
-      if: ${{ matrix.dep-versions == 'oldest' }}
-      run: |
-        pip install "pygeo[testing] @ git+https://github.com/mdolab/pygeo.git@v${{ matrix.PYGEO_VERSION_OLDEST }}"
-    - name: Install pyGeo latest
-      if: ${{ matrix.dep-versions == 'latest' }}
-      run: |
-        pip install "pygeo[testing] @ git+https://github.com/mdolab/pygeo.git"
-
-    - name: List installed Python packages
-      run: |
-        pip list -v
-
-    - name: Run tests (latest)
-      env:
-        OMPI_MCA_btl: ^openib   # prevent OpenMPI warning messages
-      if: ${{ matrix.dep-versions == 'latest' }}
-      run: |
-        testflo -n 2 -v openaerostruct --coverage --coverpkg openaerostruct
-        coverage xml
-    # skip MPI tests on the oldest
-    - name: Run tests (oldest)
-      env:
-        OMPI_MCA_btl: ^openib   # prevent OpenMPI warning messages
-      if: ${{ matrix.dep-versions == 'oldest' }}
-      run: |
-        testflo -n 2 -v --exclude \*MPI\* openaerostruct --coverage --coverpkg openaerostruct
-        coverage xml
-
-    - name: Upload Coverage to Codecov
-      uses: codecov/codecov-action@v4
-      with:
-        fail_ci_if_error: true
-        verbose: true
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      - uses: actions/checkout@v4
+      - name: Install OAS
+        run: |
+          pip install -e .[test,mphys]
+      - name: Run tests (latest)
+        run: |
+          testflo -n 2 -v openaerostruct --coverage --coverpkg openaerostruct
+          coverage xml
+
+      - name: Upload Coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          fail_ci_if_error: true
+          verbose: true
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   # --- linting and formatting ---
   black: