diff --git a/ci/tools/merge_cuda_core_wheels.py b/ci/tools/merge_cuda_core_wheels.py
index c66a1bfa2a8..23a8a21289f 100644
--- a/ci/tools/merge_cuda_core_wheels.py
+++ b/ci/tools/merge_cuda_core_wheels.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-# SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2024-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #
 # SPDX-License-Identifier: Apache-2.0
 
@@ -27,10 +27,9 @@
 import tempfile
 import zipfile
 from pathlib import Path
-from typing import List
 
 
-def run_command(cmd: List[str], cwd: Path | None = None, env: dict = os.environ) -> subprocess.CompletedProcess:
+def run_command(cmd: list[str], cwd: Path | None = None, env: dict = os.environ) -> subprocess.CompletedProcess:
     """Run a command with error handling."""
     print(f"Running: {' '.join(cmd)}")
     if cwd:
@@ -78,7 +77,7 @@ def print_wheel_directory_structure(wheel_path: Path, filter_prefix: str = "cuda
         print(f"Warning: Could not list wheel contents: {e}", file=sys.stderr)
 
 
-def merge_wheels(wheels: List[Path], output_dir: Path, show_wheel_contents: bool = True) -> Path:
+def merge_wheels(wheels: list[Path], output_dir: Path, show_wheel_contents: bool = True) -> Path:
     """Merge multiple wheels into a single wheel with version-specific binaries."""
     print("\n=== Merging wheels ===", file=sys.stderr)
     print(f"Input wheels: {[w.name for w in wheels]}", file=sys.stderr)
diff --git a/cuda_core/tests/helpers/__init__.py b/cuda_core/tests/helpers/__init__.py
index 5ce5ab7f05b..2305cfaa1e5 100644
--- a/cuda_core/tests/helpers/__init__.py
+++ b/cuda_core/tests/helpers/__init__.py
@@ -3,7 +3,6 @@
 
 import functools
 import os
-from typing import Union
 
 from cuda.core._utils.cuda_utils import handle_return
 from cuda.pathfinder import get_cuda_path_or_home
@@ -23,7 +22,7 @@
 
 
 @functools.cache
-def supports_ipc_mempool(device_id: Union[int, object]) -> bool:
+def supports_ipc_mempool(device_id: int | object) -> bool:
     """Return True if mempool IPC via POSIX file descriptor is supported.
 
     Uses cuDeviceGetAttribute(CU_DEVICE_ATTRIBUTE_MEMPOOL_SUPPORTED_HANDLE_TYPES)
diff --git a/cuda_python_test_helpers/pyproject.toml b/cuda_python_test_helpers/pyproject.toml
index 85652b61c50..f20720f6158 100644
--- a/cuda_python_test_helpers/pyproject.toml
+++ b/cuda_python_test_helpers/pyproject.toml
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 [build-system]
@@ -12,7 +12,7 @@ description = "Shared test helpers for CUDA Python projects"
 readme = {file = "README.md", content-type = "text/markdown"}
 authors = [{ name = "NVIDIA Corporation" }]
 license = "Apache-2.0"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
   "Programming Language :: Python :: 3 :: Only",
   "Operating System :: POSIX :: Linux",
diff --git a/toolshed/make_site_packages_libdirs.py b/toolshed/make_site_packages_libdirs.py
index e1cbcb28825..d4664798850 100755
--- a/toolshed/make_site_packages_libdirs.py
+++ b/toolshed/make_site_packages_libdirs.py
@@ -17,7 +17,6 @@
 import re
 import sys
 from pathlib import Path
-from typing import Dict, Set
 
 sys.path.insert(0, str(Path(__file__).resolve().parent))
 from _catalog_writer import load_catalog, update_specs, write_catalog
@@ -31,8 +30,8 @@ def _strip_site_packages_prefix(p: str) -> str:
     return _SITE_PACKAGES_RE.sub("", p)
 
 
-def _parse_lines_linux(lines: list[str]) -> Dict[str, Set[str]]:
-    d: Dict[str, Set[str]] = {}
+def _parse_lines_linux(lines: list[str]) -> dict[str, set[str]]:
+    d: dict[str, set[str]] = {}
     for raw in lines:
         line = raw.strip()
         if not line or line.startswith("#"):
@@ -63,9 +62,9 @@ def _extract_libname_from_dll(fname: str) -> str | None:
     return name or None
 
 
-def _parse_lines_windows(lines: list[str]) -> Dict[str, Set[str]]:
+def _parse_lines_windows(lines: list[str]) -> dict[str, set[str]]:
     """Collect {libname: set(dirnames)} with deduped directories."""
-    m: Dict[str, Set[str]] = {}
+    m: dict[str, set[str]] = {}
     for raw in lines:
         line = raw.strip()
         if not line or line.startswith("#"):