diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
deleted file mode 100644
index 8363e721..00000000
--- a/.github/workflows/mypy.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-on:
-  pull_request:
-    branches:
-      - main
-name: mypy
-jobs:
-  mypy:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v4
-    - name: Setup Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: "3.14"
-    - name: Install nox
-      run: |
-        python -m pip install --upgrade setuptools pip wheel
-        python -m pip install nox
-    - name: Run mypy
-      run: |
-        nox -s mypy
diff --git a/noxfile.py b/noxfile.py
index 37ef2caf..98da50ef 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -70,6 +70,17 @@ def lint(session):
     )
     session.run("flake8", "google", "tests")
 
+    """Run type-checking."""
+    session.install(".[grpc,async_rest]", "mypy")
+    session.install(
+        "types-setuptools",
+        "types-requests",
+        "types-protobuf",
+        "types-dataclasses",
+        "types-mock; python_version=='3.7'",
+    )
+    session.run("mypy", "google", "tests")
+
 
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def blacken(session):
@@ -265,27 +276,6 @@ def lint_setup_py(session):
     session.run("python", "setup.py", "check", "--restructuredtext", "--strict")
 
 
-@nox.session(python=DEFAULT_PYTHON_VERSION)
-def pytype(session):
-    """Run type-checking."""
-    session.install(".[grpc]", "pytype")
-    session.run("pytype")
-
-
-@nox.session(python=DEFAULT_PYTHON_VERSION)
-def mypy(session):
-    """Run type-checking."""
-    session.install(".[grpc,async_rest]", "mypy")
-    session.install(
-        "types-setuptools",
-        "types-requests",
-        "types-protobuf",
-        "types-dataclasses",
-        "types-mock; python_version=='3.7'",
-    )
-    session.run("mypy", "google", "tests")
-
-
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def cover(session):
     """Run the final coverage report.