diff --git a/.flake8 b/.flake8
new file mode 100644
index 00000000..34126571
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,26 @@
+[flake8]
+exclude =
+    .venv,
+    .tox,
+    .git,
+    __pycache__,
+    _package/tests/files/*,
+    docs/source/conf.py,
+    pydocs/source/conf.py,
+    build,
+    dist,
+    tests/files/*,
+    tests/fixtures/*,
+    *.pyc,
+    *.egg-info,
+    .cache,
+    .eggs
+ignore = D200, D212, B028, W503
+max-line-length = 120
+docstring-convention = google
+import-order-style = appnexus
+application-import-names = xms.interp
+application-package-names = xms
+count = true
+statistics = true
+banned-modules = osgeo.*=Use the xmsgdal library instead.
diff --git a/.github/workflows/XmsInterp-CI.yaml b/.github/workflows/XmsInterp-CI.yaml
index 31f76a15..038c75a4 100644
--- a/.github/workflows/XmsInterp-CI.yaml
+++ b/.github/workflows/XmsInterp-CI.yaml
@@ -31,7 +31,7 @@ jobs:
     steps:
       # Checkout Sources
       - name: Checkout Source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       # Setup Python
       - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
@@ -42,10 +42,15 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install flake8 flake8-docstrings flake8-bugbear flake8-import-order pep8-naming
+          pip install "xmsconan==2.16.0" -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
+      # Generate .flake8 so CI lints with the same config developers use locally.
+      # Do not inline the flake8 settings here: that duplicates .flake8.jinja and
+      # the two copies drift apart silently.
+      - name: Generate Build Files
+        run: xmsconan_gen build.toml
       # Flake Code
       - name: Run Flake
-        run: |
-          flake8 --exclude .tox,.git,__pycache__,_package/tests/files/*,pydocs/source/conf.py,build,dist,tests/fixtures/*,*.pyc,*.egg-info,.cache,.eggs --ignore=D200,D212 --max-line-length=120 --docstring-convention google --isolated --import-order-style=appnexus --application-import-names=xms.interp --application-package-names=xms --count --statistics _package
+        run: flake8 _package
 
   # ----------------------------------------------------------------------------------------------
   # MAC
@@ -94,7 +99,7 @@ jobs:
           clang --version
       # Checkout Sources
       - name: Checkout Source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       # Setup Python
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -104,8 +109,11 @@ jobs:
       - name: Install Python Dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install conan devpi-client wheel
-          python -m pip install xmsconan>=2.12.2 -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
+          # conan is pinned to a patch series on purpose: a minor bump can change
+          # package_id computation and silently detach builds from the binaries
+          # already published to the remote. Bump this deliberately.
+          pip install "conan~=2.31.0" devpi-client wheel
+          python -m pip install --upgrade "xmsconan==2.16.0" -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
       # Setup Conan
       - name: Setup Conan
         run: xmsconan_conan_setup --remote-url ${{ env.CONAN_REMOTE_URL }} --login --remove-conancenter
@@ -234,12 +242,15 @@ jobs:
     steps:
       # Checkout Sources
       - name: Checkout Source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       # Install Python Dependencies
       - name: Install Python Dependencies
         run: |
-          pip install conan devpi-client wheel
-          pip install xmsconan>=2.12.2 -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
+          # conan is pinned to a patch series on purpose: a minor bump can change
+          # package_id computation and silently detach builds from the binaries
+          # already published to the remote. Bump this deliberately.
+          pip install "conan~=2.31.0" devpi-client wheel
+          pip install --upgrade "xmsconan==2.16.0" -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
       # Setup Conan
       - name: Setup Conan
         run: xmsconan_conan_setup --remote-url ${{ env.CONAN_REMOTE_URL }} --login
@@ -368,7 +379,7 @@ jobs:
     steps:
       # Checkout Sources
       - name: Checkout Source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       # Setup Python
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -383,8 +394,11 @@ jobs:
       - name: Install Python Dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install conan devpi-client wheel
-          python -m pip install xmsconan>=2.12.2 -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
+          # conan is pinned to a patch series on purpose: a minor bump can change
+          # package_id computation and silently detach builds from the binaries
+          # already published to the remote. Bump this deliberately.
+          pip install "conan~=2.31.0" devpi-client wheel
+          python -m pip install --upgrade "xmsconan==2.16.0" -i https://public.aquapi.aquaveo.com/aquaveo/dev/+simple
       # Setup Visual Studio
       - name: Setup Visual Studio
         uses: microsoft/setup-msbuild@v2
diff --git a/build.toml b/build.toml
index 4586bd1a..11148972 100644
--- a/build.toml
+++ b/build.toml
@@ -3,8 +3,8 @@ description = "Interpolation library for XMS products"
 ci_type = "github"
 
 xms_dependencies = [
-    { name = "xmscore", version = "7.0.8" },
-    { name = "xmsgrid", version = "9.0.9" },
+    { name = "xmscore", version = "7.0.11" },
+    { name = "xmsgrid", version = "9.0.10" },
 ]
 
 python_namespaced_dir = "interp"
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 00000000..5a5beaf9
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,3 @@
+[pytest]
+python_files = test_*.py *_test.py *_pyt.py
+testpaths = _package/tests