diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5a1b6412..112f0928 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,4 +1,4 @@
-name: 'Test'
+name: "Test"
 
 on: [push, pull_request, workflow_dispatch]
 
@@ -20,13 +20,12 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/pyproject.toml') }}
           restore-keys: |
             ${{ runner.os }}-pip-
 
       - name: Install dependencies
-        run:
-          python -m pip install -r tests/requirements.txt
+        run: python -m pip install --group tests
 
       - name: Run pyright tests
         uses: jakebailey/pyright-action@v2
@@ -34,8 +33,7 @@ jobs:
           pylance-version: latest-prerelease
 
       - name: Run mypy tests
-        run:
-          python -m mypy .
+        run: python -m mypy .
 
   hygiene:
     runs-on: ubuntu-latest
@@ -47,6 +45,4 @@ jobs:
 
       - name: Run Ruff Linter
         uses: astral-sh/ruff-action@v3
-        with:
-          version: "0.11.*"
       - run: ruff format --check
diff --git a/pyproject.toml b/pyproject.toml
index 3bcacb9f..bf17a7bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,34 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "microsoft-python-type-stubs"
-dynamic = ["version"]
+version = "0"
+
+[dependency-groups]
+hygiene = ["ruff ==0.11.*"]
+tests = [
+    # Tools used for testing
+    "docopt-ng",
+    "mypy ==1.13.*",
+    "pyright",
+
+    # Typed libraries and stubs
+    "matplotlib >=3.8",
+    "pandas-stubs",
+    "pytest",
+    "scipy-stubs",
+    "typing_extensions",
+
+    # Untyped libraries, used to prevent "reportMissingImports" and get inferred typing
+    "joblib",
+    "networkx",
+    "PyOpenGL",
+    "scikit-learn",
+    "sympy",
+    "traitlets",
+    "transformers",
+]
+dev = [{ include-group = "hygiene" }, { include-group = "tests" }]
+
 
 # Allow these stubs to be installed from GitHub
 # We need an explicit mapping instead of just
diff --git a/tests/requirements.txt b/tests/requirements.txt
deleted file mode 100644
index 40f437c9..00000000
--- a/tests/requirements.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-# Tools used for testing
-docopt-ng
-mypy==1.13.*
-pyright
-
-# Typed libraries and stubs
-matplotlib>=3.8
-pandas-stubs
-pytest
-scipy-stubs
-typing_extensions
-
-# Untyped libraries, used to prevent "reportMissingImports" and get inferred typing
-joblib
-networkx
-PyOpenGL
-scikit-learn
-sympy
-traitlets
-transformers
-transformers
diff --git a/tests/run_hygiene.py b/tests/run_hygiene.py
index 5766c6c7..97770ee6 100644
--- a/tests/run_hygiene.py
+++ b/tests/run_hygiene.py
@@ -6,7 +6,8 @@
 
 def install_requirements():
     print("\nInstalling requirements...")
-    return subprocess.run((sys.executable, "-m", "pip", "install", "--upgrade", "ruff"))
+    subprocess.check_call((sys.executable, "-m", "pip", "install", "pip>=25.1"))
+    subprocess.check_call((sys.executable, "-m", "pip", "install", "--upgrade", "--group", "hygiene"))
 
 
 def run_ruff_fix():
@@ -20,11 +21,9 @@ def run_ruff_format():
 
 
 def main():
-    test_folder = Path(__file__).parent
-    root = test_folder.parent
-    os.chdir(root)
+    os.chdir(Path(__file__).parent.parent)
 
-    install_requirements().check_returncode()
+    install_requirements()
     results = (
         run_ruff_fix(),
         run_ruff_format(),
diff --git a/tests/run_tests.py b/tests/run_tests.py
index e82b4357..5fcd5a8b 100644
--- a/tests/run_tests.py
+++ b/tests/run_tests.py
@@ -4,11 +4,10 @@
 from pathlib import Path
 
 
-def install_requirements(test_folder: Path):
+def install_requirements():
     print("\nInstalling requirements...")
-    return subprocess.run(
-        (sys.executable, "-m", "pip", "install", "--upgrade", "-r", os.path.join(test_folder, "requirements.txt"))
-    )
+    subprocess.check_call((sys.executable, "-m", "pip", "install", "pip>=25.1"))
+    subprocess.check_call((sys.executable, "-m", "pip", "install", "--upgrade", "--group", "tests"))
 
 
 def run_pyright():
@@ -25,11 +24,9 @@ def run_mypy():
 
 
 def main():
-    test_folder = Path(__file__).parent
-    root = test_folder.parent
-    os.chdir(root)
+    os.chdir(Path(__file__).parent.parent)
 
-    install_requirements(test_folder).check_returncode()
+    install_requirements()
     results = (
         run_mypy(),
         run_pyright(),