diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index a19b27a7..b724bada 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -17,15 +17,37 @@ branchProtectionRules:
     - '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'
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 4e4fa25d..f260a6a5 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -23,6 +23,7 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
         exclude:
           - option: "_wo_grpc"
             python: 3.7
@@ -37,6 +38,7 @@ jobs:
       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
diff --git a/noxfile.py b/noxfile.py
index 2bbd011a..c318c49f 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -28,7 +28,7 @@
 # Black and flake8 clash on the syntax for ignoring flake8's F401 in this file.
 BLACK_EXCLUDES = ["--exclude", "^/google/api_core/operations_v1/__init__.py"]
 
-PYTHON_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+PYTHON_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 
 DEFAULT_PYTHON_VERSION = "3.10"
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
@@ -95,8 +95,7 @@ def install_prerelease_dependencies(session, constraints_path):
         prerel_deps = [
             "google-auth",
             "googleapis-common-protos",
-            # Exclude grpcio!=1.67.0rc1 which does not support python 3.13
-            "grpcio!=1.67.0rc1",
+            "grpcio",
             "grpcio-status",
             "proto-plus",
             "protobuf",
diff --git a/testing/constraints-3.14.txt b/testing/constraints-3.14.txt
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/asyncio/test_operation_async.py b/tests/asyncio/test_operation_async.py
index 939be094..9d9fb5d2 100644
--- a/tests/asyncio/test_operation_async.py
+++ b/tests/asyncio/test_operation_async.py
@@ -84,6 +84,7 @@ async def test_constructor():
     assert await future.running()
 
 
+@pytest.mark.asyncio
 def test_metadata():
     expected_metadata = struct_pb2.Struct()
     future, _, _ = make_operation_future(
@@ -176,6 +177,7 @@ async def test_unexpected_result(unused_sleep):
     assert "Unexpected state" in "{!r}".format(exception)
 
 
+@pytest.mark.asyncio
 def test_from_gapic():
     operation_proto = make_operation_proto(done=True)
     operations_client = mock.create_autospec(