diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
deleted file mode 100644
index b724bada..00000000
--- a/.github/sync-repo-settings.yaml
+++ /dev/null
@@ -1,60 +0,0 @@
-# https://github.com/googleapis/repo-automation-bots/tree/main/packages/sync-repo-settings
-# Rules for main branch protection
-branchProtectionRules:
-# Identifies the protection rule pattern. Name of the branch to be protected.
-# Defaults to `main`
-- pattern: main
-  requiresCodeOwnerReviews: true
-  requiresStrictStatusChecks: true
-  requiredStatusCheckContexts:
-    - 'cla/google'
-    # No Kokoro:  the following are Github actions
-    - 'lint'
-    - 'mypy'
-    - 'unit_grpc_gcp-3.7'
-    - 'unit_grpc_gcp-3.8'
-    - 'unit_grpc_gcp-3.9'
-    - 'unit_grpc_gcp-3.10'
-    - 'unit_grpc_gcp-3.11'
-    - 'unit_grpc_gcp-3.12'
-    - 'unit_grpc_gcp-3.13'
-    - 'unit_grpc_gcp-3.14'
-    - 'unit-3.7'
-    - 'unit-3.8'
-    - 'unit-3.9'
-    - 'unit-3.10'
-    - 'unit-3.11'
-    - 'unit-3.12'
-    - 'unit-3.13'
-    - 'unit-3.14'
-    - 'unit_wo_grpc-3.10'
-    - 'unit_wo_grpc-3.11'
-    - 'unit_wo_grpc-3.12'
-    - 'unit_wo_grpc-3.13'
-    - 'unit_wo_grpc-3.14'
-    - 'unit_w_prerelease_deps-3.7'
-    - 'unit_w_prerelease_deps-3.8'
-    - 'unit_w_prerelease_deps-3.9'
-    - 'unit_w_prerelease_deps-3.10'
-    - 'unit_w_prerelease_deps-3.11'
-    - 'unit_w_prerelease_deps-3.12'
-    - 'unit_w_prerelease_deps-3.13'
-    - 'unit_w_prerelease_deps-3.14'
-    - 'unit_w_async_rest_extra-3.7'
-    - 'unit_w_async_rest_extra-3.8'
-    - 'unit_w_async_rest_extra-3.9'
-    - 'unit_w_async_rest_extra-3.10'
-    - 'unit_w_async_rest_extra-3.11'
-    - 'unit_w_async_rest_extra-3.12'
-    - 'unit_w_async_rest_extra-3.13'
-    - 'unit_w_async_rest_extra-3.14'
-    - 'cover'
-    - 'docs'
-    - 'docfx'
-permissionRules:
-  - team: actools-python
-    permission: admin
-  - team: actools
-    permission: admin
-  - team: yoshi-python
-    permission: push
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/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index f654277b..ce988835 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -6,7 +6,7 @@ on:
       - main
 
 jobs:
-  run-unittests:
+  unit:
     name: unit${{ matrix.option }}-${{ matrix.python }}
     # TODO(https://github.com/googleapis/gapic-generator-python/issues/2303): use `ubuntu-latest` once this bug is fixed.
     # Use ubuntu-22.04 until Python 3.7 is removed from the test matrix
@@ -14,7 +14,6 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        option: ["", "_grpc_gcp", "_wo_grpc", "_w_prerelease_deps", "_w_async_rest_extra"]
         python:
           - "3.7"
           - "3.8"
@@ -24,13 +23,6 @@ jobs:
           - "3.12"
           - "3.13"
           - "3.14"
-        exclude:
-          - option: "_wo_grpc"
-            python: 3.7
-          - option: "_wo_grpc"
-            python: 3.8
-          - option: "_wo_grpc"
-            python: 3.9
     steps:
     - name: Checkout
       uses: actions/checkout@v4
@@ -39,27 +31,52 @@ jobs:
       with:
         python-version: ${{ matrix.python }}
         allow-prereleases: true
-    - name: Install nox
+    - name: Install nox / pytest
       run: |
         python -m pip install --upgrade setuptools pip wheel
-        python -m pip install nox
+        python -m pip install nox pytest
     - name: Run unit tests
       env:
-        COVERAGE_FILE: .coverage${{ matrix.option }}-${{matrix.python }}
+        COVERAGE_FILE: .coverage-${{matrix.python }}
       run: |
-        nox -s unit${{ matrix.option }}-${{ matrix.python }}
+        nox -s unit-${{ matrix.python }}
     - name: Upload coverage results
       uses: actions/upload-artifact@v4
       with:
-        name: coverage-artifact-${{ matrix.option }}-${{ matrix.python }}
-        path: .coverage${{ matrix.option }}-${{ matrix.python }}
+        name: coverage-artifact-${{ matrix.python }}
+        path: .coverage-${{ matrix.python }}
         include-hidden-files: true
 
+  unit-prerelease:
+    name: prerelease_deps
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: ["3.14"]
+        option: ["prerelease"]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Setup Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python }}
+        allow-prereleases: true
+    - name: Install nox
+      run: |
+        python -m pip install --upgrade setuptools pip wheel
+        python -m pip install nox
+    - name: Run ${{ matrix.option }} tests
+      env:
+        COVERAGE_FILE: .coverage${{ matrix.option }}-${{matrix.python }}
+      run: |
+        nox -s prerelease_deps
+
   report-coverage:
     name: cover
     runs-on: ubuntu-latest
     needs:
-        - run-unittests
+        - unit
     steps:
     - name: Checkout
       uses: actions/checkout@v4
diff --git a/noxfile.py b/noxfile.py
index 37ef2caf..868ddf81 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -36,13 +36,8 @@
 # 'docfx' is excluded since it only needs to run in 'docs-presubmit'
 nox.options.sessions = [
     "unit",
-    "unit_grpc_gcp",
-    "unit_wo_grpc",
-    "unit_w_prerelease_deps",
-    "unit_w_async_rest_extra",
+    "prerelease_deps",
     "cover",
-    "pytype",
-    "mypy",
     "lint",
     "lint_setup_py",
     "blacken",
@@ -70,6 +65,17 @@ 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):
@@ -215,46 +221,41 @@ def default(session, install_grpc=True, prerelease=False, install_async_rest=Fal
 
 
 @nox.session(python=PYTHON_VERSIONS)
-def unit(session):
+@nox.parametrize(
+    ["install_grpc_gcp", "install_grpc", "install_async_rest"],
+    [
+        (False, True, False),  # Run unit tests with grpcio installed
+        (True, True, False),  # Run unit tests with grpcio/grpcio-gcp installed
+        (False, False, False),  # Run unit tests without grpcio installed
+        (False, True, True),  # Run unit tests with grpcio and async rest installed
+    ],
+)
+def unit(session, install_grpc_gcp, install_grpc, install_async_rest):
     """Run the unit test suite."""
-    default(session)
-
 
-@nox.session(python=PYTHON_VERSIONS)
-def unit_w_prerelease_deps(session):
-    """Run the unit test suite."""
-    default(session, prerelease=True)
-
-
-@nox.session(python=PYTHON_VERSIONS)
-def unit_grpc_gcp(session):
-    """
-    Run the unit test suite with grpcio-gcp installed.
-    `grpcio-gcp` doesn't support protobuf 4+.
-    Remove extra `grpcgcp` when protobuf 3.x is dropped.
-    https://github.com/googleapis/python-api-core/issues/594
-    """
-    constraints_path = str(
-        CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
+    # `grpcio-gcp` doesn't support protobuf 4+.
+    # Remove extra `grpcgcp` when protobuf 3.x is dropped.
+    # https://github.com/googleapis/python-api-core/issues/594
+    if install_grpc_gcp:
+        constraints_path = str(
+            CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
+        )
+        # Install grpcio-gcp
+        session.install("-e", ".[grpcgcp]", "-c", constraints_path)
+        # Install protobuf < 4.0.0
+        session.install("protobuf<4.0.0")
+
+    default(
+        session=session,
+        install_grpc=install_grpc,
+        install_async_rest=install_async_rest,
     )
-    # Install grpcio-gcp
-    session.install("-e", ".[grpcgcp]", "-c", constraints_path)
-    # Install protobuf < 4.0.0
-    session.install("protobuf<4.0.0")
-
-    default(session)
-
-
-@nox.session(python=PYTHON_VERSIONS)
-def unit_wo_grpc(session):
-    """Run the unit test suite w/o grpcio installed"""
-    default(session, install_grpc=False)
 
 
-@nox.session(python=PYTHON_VERSIONS)
-def unit_w_async_rest_extra(session):
-    """Run the unit test suite with the `async_rest` extra"""
-    default(session, install_async_rest=True)
+@nox.session(python=DEFAULT_PYTHON_VERSION)
+def prerelease_deps(session):
+    """Run the unit test suite."""
+    default(session, prerelease=True)
 
 
 @nox.session(python=DEFAULT_PYTHON_VERSION)
@@ -265,27 +266,6 @@ 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.