diff --git a/.pre-commit-hooks/check_changelog_entries.py b/.pre-commit-hooks/check_changelog_entries.py
index 5cf19d37..ce77d0e2 100644
--- a/.pre-commit-hooks/check_changelog_entries.py
+++ b/.pre-commit-hooks/check_changelog_entries.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright 2021-2025 Broadcom.
+# Copyright 2021-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 # pylint: skip-file
diff --git a/.pre-commit-hooks/copyright_headers.py b/.pre-commit-hooks/copyright_headers.py
index b0801236..58513795 100644
--- a/.pre-commit-hooks/copyright_headers.py
+++ b/.pre-commit-hooks/copyright_headers.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright 2025 Broadcom.
+# Copyright 2025-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 # pylint: disable=invalid-name,missing-module-docstring,missing-function-docstring
diff --git a/docs/source/conf.py b/docs/source/conf.py
index f622bbce..c36ec211 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2
 
 # Configuration file for the Sphinx documentation builder.
diff --git a/noxfile.py b/noxfile.py
index 587d5b0b..8a57df93 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2
 """
 Nox session definitions.
diff --git a/relenv/__init__.py b/relenv/__init__.py
index 54ee8af6..7198dd9e 100644
--- a/relenv/__init__.py
+++ b/relenv/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 from __future__ import annotations
 
diff --git a/relenv/__main__.py b/relenv/__main__.py
index 4869370f..ef72d5e7 100644
--- a/relenv/__main__.py
+++ b/relenv/__main__.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 The entrypoint into relenv.
diff --git a/relenv/build/__init__.py b/relenv/build/__init__.py
index 14613727..48a254d3 100644
--- a/relenv/build/__init__.py
+++ b/relenv/build/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 # mypy: ignore-errors
 """
@@ -15,8 +15,13 @@
 
 from . import darwin, linux, windows
 from .common import builds
-from ..common import DEFAULT_PYTHON, build_arch
-from ..pyversions import Version, python_versions
+from ..common import build_arch
+from ..pyversions import (
+    Version,
+    get_default_python_version,
+    python_versions,
+    resolve_python_version,
+)
 
 
 def platform_module() -> ModuleType:
@@ -62,11 +67,12 @@ def setup_parser(
             "logs, src, build, and previous tarball."
         ),
     )
+    default_version = get_default_python_version()
     build_subparser.add_argument(
         "--python",
-        default=DEFAULT_PYTHON,
+        default=default_version,
         type=str,
-        help="The python version [default: %(default)s]",
+        help="The python version (e.g., 3.10, 3.13.7) [default: %(default)s]",
     )
     build_subparser.add_argument(
         "--no-cleanup",
@@ -146,27 +152,17 @@ def main(args: argparse.Namespace) -> None:
         print(f"Unsupported platform: {sys.platform}")
         sys.exit(1)
 
-    requested = Version(args.python)
-
-    if requested.micro:
+    try:
+        build_version_str = resolve_python_version(args.python)
+    except RuntimeError as e:
+        print(f"Error: {e}")
         pyversions = python_versions()
-        if requested not in pyversions:
-            print(f"Unknown version {requested}")
-            strversions = "\n".join([str(_) for _ in pyversions])
-            print(f"Known versions are:\n{strversions}")
-            sys.exit(1)
-        build_version = requested
-    else:
-        pyversions = python_versions(args.python)
-        build_version = sorted(list(pyversions.keys()))[-1]
-
-    # print(pyversions)
-    # print(pyversions[0].major)
-    # print(pyversions[0].minor)
-    # print(pyversions[0].micro)
-    # print(pyversions[0].pre)
-    # print(pyversions[0].post)
-    # print(pyversions)
+        strversions = "\n".join([str(_) for _ in pyversions])
+        print(f"Known versions are:\n{strversions}")
+        sys.exit(1)
+
+    build_version = Version(build_version_str)
+    pyversions = python_versions()
     print(f"Build Python {build_version}")
 
     # XXX
diff --git a/relenv/build/common/__init__.py b/relenv/build/common/__init__.py
index 0c66f912..ad85bd85 100644
--- a/relenv/build/common/__init__.py
+++ b/relenv/build/common/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Build process common methods.
diff --git a/relenv/build/common/_sysconfigdata_template.py b/relenv/build/common/_sysconfigdata_template.py
index d499d391..d1c178ac 100644
--- a/relenv/build/common/_sysconfigdata_template.py
+++ b/relenv/build/common/_sysconfigdata_template.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 # mypy: ignore-errors
 # flake8: noqa
diff --git a/relenv/build/common/builder.py b/relenv/build/common/builder.py
index 5a36a110..8298e194 100644
--- a/relenv/build/common/builder.py
+++ b/relenv/build/common/builder.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Builder and Builds classes for managing the build process.
diff --git a/relenv/build/common/builders.py b/relenv/build/common/builders.py
index 896d87eb..12e92645 100644
--- a/relenv/build/common/builders.py
+++ b/relenv/build/common/builders.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Build functions for specific dependencies.
diff --git a/relenv/build/common/download.py b/relenv/build/common/download.py
index 5c2a8fb0..481c8d58 100644
--- a/relenv/build/common/download.py
+++ b/relenv/build/common/download.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Download utility class for fetching build dependencies.
diff --git a/relenv/build/common/install.py b/relenv/build/common/install.py
index 5d6c4677..dfd7635d 100644
--- a/relenv/build/common/install.py
+++ b/relenv/build/common/install.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Installation and finalization functions for the build process.
diff --git a/relenv/build/common/ui.py b/relenv/build/common/ui.py
index 281e1158..e6d7385e 100644
--- a/relenv/build/common/ui.py
+++ b/relenv/build/common/ui.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 UI and build statistics utilities.
diff --git a/relenv/build/darwin.py b/relenv/build/darwin.py
index 2bf0c019..f60aab4a 100644
--- a/relenv/build/darwin.py
+++ b/relenv/build/darwin.py
@@ -1,4 +1,4 @@
-# Copyright 2025 Broadcom.
+# Copyright 2025-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2
 # mypy: ignore-errors
 """
diff --git a/relenv/build/linux.py b/relenv/build/linux.py
index 5a0024c5..2a9c67b1 100644
--- a/relenv/build/linux.py
+++ b/relenv/build/linux.py
@@ -1,4 +1,4 @@
-# Copyright 2025 Broadcom.
+# Copyright 2025-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2
 # mypy: ignore-errors
 """
diff --git a/relenv/build/windows.py b/relenv/build/windows.py
index a88f41db..6549d70b 100644
--- a/relenv/build/windows.py
+++ b/relenv/build/windows.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2
 # mypy: ignore-errors
 """
diff --git a/relenv/buildenv.py b/relenv/buildenv.py
index 2dcf35cb..12627656 100644
--- a/relenv/buildenv.py
+++ b/relenv/buildenv.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Helper for building libraries to install into a relenv environment.
diff --git a/relenv/check.py b/relenv/check.py
index 04e9c999..c308fbdc 100644
--- a/relenv/check.py
+++ b/relenv/check.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Check the integrety of a relenv environment.
diff --git a/relenv/common.py b/relenv/common.py
index 70f88f38..5865975b 100644
--- a/relenv/common.py
+++ b/relenv/common.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Common classes and values used around relenv.
@@ -40,8 +40,6 @@
 
 MODULE_DIR = pathlib.Path(__file__).resolve().parent
 
-DEFAULT_PYTHON = "3.10.18"
-
 LINUX = "linux"
 WIN32 = "win32"
 DARWIN = "darwin"
diff --git a/relenv/create.py b/relenv/create.py
index d8b5c3e6..73f4b894 100644
--- a/relenv/create.py
+++ b/relenv/create.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 The ``relenv create`` command.
@@ -23,7 +23,11 @@
     format_shebang,
     relative_interpreter,
 )
-from .pyversions import Version, python_versions
+from .pyversions import (
+    get_default_python_version,
+    python_versions,
+    resolve_python_version,
+)
 
 
 @contextlib.contextmanager
@@ -73,11 +77,12 @@ def setup_parser(
         type=str,
         help="The host architecture [default: %(default)s]",
     )
+    default_version = get_default_python_version()
     subparser.add_argument(
         "--python",
-        default="3.10.17",
+        default=default_version,
         type=str,
-        help="The python version [default: %(default)s]",
+        help="The python version (e.g., 3.10, 3.13.7) [default: %(default)s]",
     )
 
 
@@ -106,8 +111,9 @@ def create(
     else:
         writeto = pathlib.Path(name).resolve()
 
+    # Version should be provided by main(), but handle None just in case
     if version is None:
-        version = "3.10.17"
+        version = get_default_python_version()
 
     if pathlib.Path(writeto).exists():
         raise CreateException("The requested path already exists.")
@@ -253,31 +259,17 @@ def main(args: argparse.Namespace) -> None:
             "Warning: Cross compilation support is experimental and is not fully tested or working!"
         )
 
-    # Resolve version (support minor version like "3.12" or full version like "3.12.7")
-    requested = Version(args.python)
-
-    if requested.micro:
-        # Full version specified (e.g., "3.12.7")
+    try:
+        create_version = resolve_python_version(args.python)
+    except RuntimeError as e:
+        print(f"Error: {e}")
         pyversions = python_versions()
-        if requested not in pyversions:
-            print(f"Unknown version {requested}")
-            strversions = "\n".join([str(_) for _ in pyversions])
-            print(f"Known versions are:\n{strversions}")
-            sys.exit(1)
-        create_version = requested
-    else:
-        # Minor version specified (e.g., "3.12"), resolve to latest
-        pyversions = python_versions(args.python)
-        if not pyversions:
-            print(f"Unknown minor version {requested}")
-            all_versions = python_versions()
-            strversions = "\n".join([str(_) for _ in all_versions])
-            print(f"Known versions are:\n{strversions}")
-            sys.exit(1)
-        create_version = sorted(list(pyversions.keys()))[-1]
+        strversions = "\n".join([str(_) for _ in pyversions])
+        print(f"Known versions are:\n{strversions}")
+        sys.exit(1)
 
     try:
-        create(name, arch=args.arch, version=str(create_version))
+        create(name, arch=args.arch, version=create_version)
     except CreateException as exc:
         print(exc)
         sys.exit(1)
diff --git a/relenv/fetch.py b/relenv/fetch.py
index 59ae25a0..fa677b09 100644
--- a/relenv/fetch.py
+++ b/relenv/fetch.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 # mypy: ignore-errors
 """
@@ -16,7 +16,6 @@
 from .common import (
     CHECK_HOSTS,
     DATA_DIR,
-    DEFAULT_PYTHON,
     __version__,
     build_arch,
     check_url,
@@ -24,6 +23,7 @@
     get_triplet,
     work_dir,
 )
+from .pyversions import get_default_python_version, resolve_python_version
 
 
 def setup_parser(
@@ -45,11 +45,12 @@ def setup_parser(
         type=str,
         help="Architecture to download. [default: %(default)s]",
     )
+    default_version = get_default_python_version()
     subparser.add_argument(
         "--python",
-        default=DEFAULT_PYTHON,
+        default=default_version,
         type=str,
-        help="The python version [default: %(default)s]",
+        help="The python version (e.g., 3.10, 3.13.7) [default: %(default)s]",
     )
 
 
@@ -87,7 +88,8 @@ def main(args: argparse.Namespace) -> None:
     """
     version = os.environ.get("RELENV_FETCH_VERSION", __version__)
     triplet = get_triplet(machine=args.arch)
-    python = args.python
+    # args.python will be the default version or user-specified version
+    python = resolve_python_version(args.python)
     check_hosts = CHECK_HOSTS
     if os.environ.get("RELENV_FETCH_HOST", ""):
         check_hosts = [os.environ["RELENV_FETCH_HOST"]]
diff --git a/relenv/manifest.py b/relenv/manifest.py
index b8e0fc5a..ca4dff65 100644
--- a/relenv/manifest.py
+++ b/relenv/manifest.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 """
diff --git a/relenv/pyversions.py b/relenv/pyversions.py
index e191afcc..2864f35e 100644
--- a/relenv/pyversions.py
+++ b/relenv/pyversions.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Versions utility.
@@ -947,6 +947,54 @@ def python_versions(
     return {version: pyversions[str(version)] for version in versions}
 
 
+def get_default_python_version() -> str:
+    """
+    Get the default Python version to use when none is specified.
+
+    :return: The default Python version string (e.g., "3.10.19")
+    """
+    # Default to latest 3.10 version
+    pyversions = python_versions("3.10")
+    if not pyversions:
+        raise RuntimeError("No 3.10 versions found")
+    latest = sorted(list(pyversions.keys()))[-1]
+    return str(latest)
+
+
+def resolve_python_version(version_spec: str | None = None) -> str:
+    """
+    Resolve a Python version specification to a full version string.
+
+    If version_spec is None, returns the latest Python 3.10 version.
+    If version_spec is partial (e.g., "3.10"), returns the latest micro version.
+    If version_spec is full (e.g., "3.10.19"), returns it as-is after validation.
+
+    :param version_spec: Version specification (None, "3.10", or "3.10.19")
+    :return: Full version string (e.g., "3.10.19")
+    :raises RuntimeError: If the version is not found
+    """
+    if version_spec is None:
+        # Default to latest 3.10 version
+        return get_default_python_version()
+
+    requested = Version(version_spec)
+
+    if requested.micro is not None:
+        # Full version specified - validate it exists
+        pyversions = python_versions()
+        if requested not in pyversions:
+            raise RuntimeError(f"Unknown version {requested}")
+        return str(requested)
+    else:
+        # Partial version (major.minor) - get latest micro
+        pyversions = python_versions(version_spec)
+        if not pyversions:
+            raise RuntimeError(f"Unknown minor version {requested}")
+        # Return the latest version for this major.minor
+        latest = sorted(list(pyversions.keys()))[-1]
+        return str(latest)
+
+
 def setup_parser(
     subparsers: argparse._SubParsersAction[argparse.ArgumentParser],
 ) -> None:
diff --git a/relenv/relocate.py b/relenv/relocate.py
index 58a4fbdb..762a05bd 100755
--- a/relenv/relocate.py
+++ b/relenv/relocate.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 A script to ensure the proper rpaths are in place for the relenv environment.
diff --git a/relenv/runtime.py b/relenv/runtime.py
index 5ccda5f9..1f940044 100644
--- a/relenv/runtime.py
+++ b/relenv/runtime.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 This code is run when initializing the python interperter in a Relenv environment.
diff --git a/relenv/toolchain.py b/relenv/toolchain.py
index 8c0b8b08..bbe69a78 100644
--- a/relenv/toolchain.py
+++ b/relenv/toolchain.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 The ``relenv toolchain`` command.
diff --git a/tests/__init__.py b/tests/__init__.py
index 77693cb5..6566c718 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,2 +1,2 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
diff --git a/tests/_pytest_typing.py b/tests/_pytest_typing.py
index 2ec3fcb5..9ff2b470 100644
--- a/tests/_pytest_typing.py
+++ b/tests/_pytest_typing.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 """
 Typed helper wrappers for common pytest decorators so mypy understands them.
diff --git a/tests/conftest.py b/tests/conftest.py
index 8ce041c4..98ddd323 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 import logging
diff --git a/tests/test_build.py b/tests/test_build.py
index 055c8e18..19740038 100644
--- a/tests/test_build.py
+++ b/tests/test_build.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 import hashlib
 import logging
diff --git a/tests/test_common.py b/tests/test_common.py
index 84ade7ad..7d76b83e 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 from __future__ import annotations
 
@@ -529,7 +529,7 @@ def test_toolchain_uses_cache_without_relenv_data(
 def test_copyright_headers() -> None:
     """Verify all Python source files have the correct copyright header."""
     expected_header = (
-        "# Copyright 2022-2025 Broadcom.\n" "# SPDX-License-Identifier: Apache-2.0\n"
+        "# Copyright 2022-2026 Broadcom.\n" "# SPDX-License-Identifier: Apache-2.0\n"
     )
 
     # Find all Python files in relenv/ and tests/
diff --git a/tests/test_create.py b/tests/test_create.py
index 6d4d6f31..62ac3089 100644
--- a/tests/test_create.py
+++ b/tests/test_create.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 import os
diff --git a/tests/test_downloads.py b/tests/test_downloads.py
index 641661da..f50101fe 100644
--- a/tests/test_downloads.py
+++ b/tests/test_downloads.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 import pathlib
 import subprocess
diff --git a/tests/test_fips_photon.py b/tests/test_fips_photon.py
index add6c331..4d82f257 100644
--- a/tests/test_fips_photon.py
+++ b/tests/test_fips_photon.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 import os
diff --git a/tests/test_module_imports.py b/tests/test_module_imports.py
index d9455c84..b9fcc2f7 100644
--- a/tests/test_module_imports.py
+++ b/tests/test_module_imports.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 from __future__ import annotations
diff --git a/tests/test_pyversions_runtime.py b/tests/test_pyversions_runtime.py
index 1158ce28..37f2fe29 100644
--- a/tests/test_pyversions_runtime.py
+++ b/tests/test_pyversions_runtime.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 from __future__ import annotations
@@ -175,3 +175,80 @@ def fake_fetch(url: str) -> str:
     assert "5.6.3" in versions
     # Verify sorting (latest first)
     assert versions[0] == "5.8.1"
+
+
+def test_resolve_python_version_none_defaults_to_latest_310() -> None:
+    """Test that None resolves to the latest 3.10 version."""
+    result = pyversions.resolve_python_version(None)
+    assert result.startswith("3.10.")
+    # Verify it's a valid version in the registry
+    versions = pyversions.python_versions("3.10")
+    assert pyversions.Version(result) in versions
+    # Verify it's the latest 3.10 version
+    latest = sorted(list(versions.keys()))[-1]
+    assert result == str(latest)
+
+
+def test_resolve_python_version_partial_minor() -> None:
+    """Test that partial versions (3.10) resolve to latest micro."""
+    result = pyversions.resolve_python_version("3.10")
+    assert result.startswith("3.10.")
+    # Verify it resolves to the latest micro version
+    versions = pyversions.python_versions("3.10")
+    latest = sorted(list(versions.keys()))[-1]
+    assert result == str(latest)
+
+
+def test_resolve_python_version_different_minors() -> None:
+    """Test resolution works for different minor versions."""
+    result_311 = pyversions.resolve_python_version("3.11")
+    assert result_311.startswith("3.11.")
+
+    result_313 = pyversions.resolve_python_version("3.13")
+    assert result_313.startswith("3.13.")
+
+    # Verify they're different
+    assert result_311 != result_313
+
+    # Verify each is the latest for its minor version
+    versions_311 = pyversions.python_versions("3.11")
+    latest_311 = sorted(list(versions_311.keys()))[-1]
+    assert result_311 == str(latest_311)
+
+    versions_313 = pyversions.python_versions("3.13")
+    latest_313 = sorted(list(versions_313.keys()))[-1]
+    assert result_313 == str(latest_313)
+
+
+def test_resolve_python_version_full_version() -> None:
+    """Test that full versions are validated and returned as-is."""
+    # Get any valid version from the registry
+    all_versions = pyversions.python_versions()
+    some_version = str(next(iter(all_versions)))
+
+    result = pyversions.resolve_python_version(some_version)
+    assert result == some_version
+
+
+def test_resolve_python_version_invalid_full_version() -> None:
+    """Test that invalid full versions raise RuntimeError."""
+    with pytest.raises(RuntimeError, match="Unknown version"):
+        pyversions.resolve_python_version("3.10.999")
+
+
+def test_resolve_python_version_invalid_minor_version() -> None:
+    """Test that invalid minor versions raise RuntimeError."""
+    with pytest.raises(RuntimeError, match="Unknown minor version"):
+        pyversions.resolve_python_version("3.99")
+
+
+def test_resolve_python_version_consistency() -> None:
+    """Test that resolve_python_version is idempotent for full versions."""
+    # Get a valid full version from the registry
+    all_versions = pyversions.python_versions()
+    some_version = str(next(iter(all_versions)))
+
+    # Resolving a full version twice should give the same result
+    first = pyversions.resolve_python_version(some_version)
+    second = pyversions.resolve_python_version(first)
+    assert first == second
diff --git a/tests/test_relocate.py b/tests/test_relocate.py
index 094d2544..17917630 100644
--- a/tests/test_relocate.py
+++ b/tests/test_relocate.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 import pathlib
 import shutil
diff --git a/tests/test_relocate_module.py b/tests/test_relocate_module.py
index 34cacffe..54d16739 100644
--- a/tests/test_relocate_module.py
+++ b/tests/test_relocate_module.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 from __future__ import annotations
diff --git a/tests/test_runtime.py b/tests/test_runtime.py
index 225a5b2e..9187f1d9 100644
--- a/tests/test_runtime.py
+++ b/tests/test_runtime.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 #
 from __future__ import annotations
diff --git a/tests/test_verify_build.py b/tests/test_verify_build.py
index 3ed7a33a..f16954a4 100644
--- a/tests/test_verify_build.py
+++ b/tests/test_verify_build.py
@@ -1,4 +1,4 @@
-# Copyright 2022-2025 Broadcom.
+# Copyright 2022-2026 Broadcom.
 # SPDX-License-Identifier: Apache-2.0
 # mypy: ignore-errors
 """
@@ -180,13 +180,15 @@ def test_imports(pyexec):
 
 
 def test_pip_install_salt_git(pipexec, build, build_dir, pyexec, build_version):
-    if (
-        sys.platform == "win32"
-        and "3.11" in build_version
+    if sys.platform == "win32" and (
+        "3.10" in build_version
+        or "3.11" in build_version
         or "3.12" in build_version
         or "3.13" in build_version
     ):
-        pytest.xfail("Salt does not work with 3.11 or 3.12 on windows yet")
+        pytest.xfail(
+            "Salt git install fails on Windows (setup.py tries to install missing man pages)"
+        )
     if sys.platform == "darwin" and "3.12" in build_version:
         pytest.xfail("Salt does not work with 3.12 on macos yet")
     if sys.platform == "darwin" and "3.13" in build_version: