diff --git a/.flake8 b/.flake8
deleted file mode 100644
index e46e8e07..00000000
--- a/.flake8
+++ /dev/null
@@ -1,32 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright 2023 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-[flake8]
-ignore = E203, E231, E266, E501, W503, ANN101, ANN102, ANN401
-exclude =
-  # Exclude generated code.
-  **/proto/**
-  **/gapic/**
-  **/services/**
-  **/types/**
-  *_pb2.py
-
-  # Standard linting exemptions.
-  **/.nox/**
-  __pycache__,
-  .git,
-  *.pyc,
-  conf.py
diff --git a/google/cloud/alloydb/connector/__init__.py b/google/cloud/alloydb/connector/__init__.py
index 6110c151..ea3d2e27 100644
--- a/google/cloud/alloydb/connector/__init__.py
+++ b/google/cloud/alloydb/connector/__init__.py
@@ -11,11 +11,11 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from google.cloud.alloydbconnector import __version__
 from google.cloud.alloydbconnector import AsyncConnector
 from google.cloud.alloydbconnector import Connector
 from google.cloud.alloydbconnector import IPTypes
 from google.cloud.alloydbconnector import RefreshStrategy
+from google.cloud.alloydbconnector import __version__
 
 __all__ = [
     "__version__",
diff --git a/google/cloud/alloydbconnector/async_connector.py b/google/cloud/alloydbconnector/async_connector.py
index 1ba50861..b6de4116 100644
--- a/google/cloud/alloydbconnector/async_connector.py
+++ b/google/cloud/alloydbconnector/async_connector.py
@@ -17,12 +17,13 @@
 import asyncio
 import logging
 from types import TracebackType
-from typing import Any, Optional, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Any
+from typing import Optional
 
 import google.auth
 from google.auth.credentials import with_scopes_if_required
 import google.auth.transport.requests
-
 import google.cloud.alloydbconnector.asyncpg as asyncpg
 from google.cloud.alloydbconnector.client import AlloyDBClient
 from google.cloud.alloydbconnector.enums import IPTypes
@@ -178,8 +179,7 @@ async def connect(
                 cache = LazyRefreshCache(instance_uri, self._client, self._keys)
             else:
                 logger.debug(
-                    f"['{instance_uri}']: Refresh strategy is set to background"
-                    " refresh"
+                    f"['{instance_uri}']: Refresh strategy is set to background refresh"
                 )
                 cache = RefreshAheadCache(instance_uri, self._client, self._keys)
             self._cache[instance_uri] = cache
diff --git a/google/cloud/alloydbconnector/asyncpg.py b/google/cloud/alloydbconnector/asyncpg.py
index 2652ee41..8476f92f 100644
--- a/google/cloud/alloydbconnector/asyncpg.py
+++ b/google/cloud/alloydbconnector/asyncpg.py
@@ -13,7 +13,8 @@
 # limitations under the License.
 
 import ssl
-from typing import Any, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Any
 
 SERVER_PROXY_PORT = 5433
 
diff --git a/google/cloud/alloydbconnector/client.py b/google/cloud/alloydbconnector/client.py
index 075a2af1..88b455e9 100644
--- a/google/cloud/alloydbconnector/client.py
+++ b/google/cloud/alloydbconnector/client.py
@@ -16,18 +16,19 @@
 
 import asyncio
 import logging
-from typing import Optional, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Optional
 
 from cryptography import x509
+
 from google.api_core.client_options import ClientOptions
 from google.api_core.gapic_v1.client_info import ClientInfo
 from google.auth.credentials import TokenState
 from google.auth.transport import requests
 import google.cloud.alloydb_v1beta as v1beta
-from google.protobuf import duration_pb2
-
 from google.cloud.alloydbconnector.connection_info import ConnectionInfo
 from google.cloud.alloydbconnector.version import __version__ as version
+from google.protobuf import duration_pb2
 
 if TYPE_CHECKING:
     from google.auth.credentials import Credentials
diff --git a/google/cloud/alloydbconnector/connection_info.py b/google/cloud/alloydbconnector/connection_info.py
index 751474ac..f9e49177 100644
--- a/google/cloud/alloydbconnector/connection_info.py
+++ b/google/cloud/alloydbconnector/connection_info.py
@@ -17,7 +17,8 @@
 from dataclasses import dataclass
 import logging
 import ssl
-from typing import Optional, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Optional
 
 from aiofiles.tempfile import TemporaryDirectory
 
diff --git a/google/cloud/alloydbconnector/connector.py b/google/cloud/alloydbconnector/connector.py
index 061f000e..3a269e91 100644
--- a/google/cloud/alloydbconnector/connector.py
+++ b/google/cloud/alloydbconnector/connector.py
@@ -24,13 +24,15 @@
 import struct
 from threading import Thread
 from types import TracebackType
-from typing import Any, Callable, Optional, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Any
+from typing import Callable
+from typing import Optional
 
 from google.auth import default
 from google.auth.credentials import TokenState
 from google.auth.credentials import with_scopes_if_required
 from google.auth.transport import requests
-
 import google.cloud.alloydb_connectors_v1.proto.resources_pb2 as connectorspb
 from google.cloud.alloydbconnector.client import AlloyDBClient
 from google.cloud.alloydbconnector.enums import IPTypes
@@ -221,8 +223,7 @@ async def connect_async(self, instance_uri: str, driver: str, **kwargs: Any) ->
                 cache = LazyRefreshCache(instance_uri, self._client, self._keys)
             else:
                 logger.debug(
-                    f"['{instance_uri}']: Refresh strategy is set to background"
-                    " refresh"
+                    f"['{instance_uri}']: Refresh strategy is set to background refresh"
                 )
                 cache = RefreshAheadCache(instance_uri, self._client, self._keys)
             self._cache[instance_uri] = cache
diff --git a/google/cloud/alloydbconnector/instance.py b/google/cloud/alloydbconnector/instance.py
index 9c3051e2..4cdb84cd 100644
--- a/google/cloud/alloydbconnector/instance.py
+++ b/google/cloud/alloydbconnector/instance.py
@@ -121,8 +121,7 @@ async def _perform_refresh(self) -> ConnectionInfo:
                 self._keys,
             )
             logger.debug(
-                f"['{self._instance_uri}']: Connection info refresh operation"
-                " complete"
+                f"['{self._instance_uri}']: Connection info refresh operation complete"
             )
             logger.debug(
                 f"['{self._instance_uri}']: Current certificate expiration = "
diff --git a/google/cloud/alloydbconnector/lazy.py b/google/cloud/alloydbconnector/lazy.py
index d86ea522..b05d5140 100644
--- a/google/cloud/alloydbconnector/lazy.py
+++ b/google/cloud/alloydbconnector/lazy.py
@@ -91,8 +91,7 @@ async def connect_info(self) -> ConnectionInfo:
                 )
                 return self._cached
             logger.debug(
-                f"['{self._instance_uri}']: Connection info "
-                "refresh operation started"
+                f"['{self._instance_uri}']: Connection info refresh operation started"
             )
             try:
                 conn_info = await self._client.get_connection_info(
diff --git a/google/cloud/alloydbconnector/pg8000.py b/google/cloud/alloydbconnector/pg8000.py
index f17766c2..7cda9c92 100644
--- a/google/cloud/alloydbconnector/pg8000.py
+++ b/google/cloud/alloydbconnector/pg8000.py
@@ -11,7 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import Any, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Any
 
 if TYPE_CHECKING:
     import ssl
diff --git a/google/cloud/alloydbconnector/psycopg.py b/google/cloud/alloydbconnector/psycopg.py
index 89bac5fb..8e91c076 100644
--- a/google/cloud/alloydbconnector/psycopg.py
+++ b/google/cloud/alloydbconnector/psycopg.py
@@ -18,7 +18,8 @@
 import ssl
 import tempfile
 import threading
-from typing import Any, TYPE_CHECKING
+from typing import TYPE_CHECKING
+from typing import Any
 
 if TYPE_CHECKING:
     import psycopg
diff --git a/noxfile.py b/noxfile.py
index d9529868..5eae8d07 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -18,8 +18,7 @@
 
 import nox
 
-BLACK_VERSION = "black==23.12.1"
-ISORT_VERSION = "isort==5.13.2"
+RUFF_VERSION = "ruff==0.11.2"
 LINT_PATHS = ["google", "tests", "noxfile.py"]
 
 SYSTEM_TEST_PYTHON_VERSIONS = ["3.10", "3.11", "3.12", "3.13", "3.14"]
@@ -36,32 +35,22 @@ def lint(session):
     session.install("-r", "requirements-test.txt")
     session.install("-r", "requirements.txt")
     session.install(
-        "flake8",
-        "flake8-annotations",
+        RUFF_VERSION,
         "mypy",
-        BLACK_VERSION,
-        ISORT_VERSION,
         "build",
         "twine",
     )
     session.run(
-        "isort",
-        "--fss",
-        "--check-only",
-        "--diff",
-        "--profile=google",
-        *LINT_PATHS,
-    )
-    session.run(
-        "black",
+        "ruff",
+        "format",
         "--check",
         "--diff",
         *LINT_PATHS,
     )
     session.run(
-        "flake8",
-        "google",
-        "tests",
+        "ruff",
+        "check",
+        *LINT_PATHS,
     )
     session.run(
         "mypy",
@@ -77,35 +66,18 @@ def lint(session):
 
 
 @nox.session
-def blacken(session):
-    """Run black.
-
-    Format code to uniform standard.
-    """
-    session.install(BLACK_VERSION)
-    session.run(
-        "black",
-        *LINT_PATHS,
-    )
-
-
-@nox.session()
 def format(session):
-    """
-    Run isort to sort imports. Then run black
-    to format code to uniform standard.
-    """
-    session.install(BLACK_VERSION, ISORT_VERSION)
-    # Use the --fss option to sort imports using strict alphabetical order.
-    # See https://pycqa.github.io/isort/docs/configuration/options.html#force-sort-within-sectionss
+    """Format code with ruff."""
+    session.install(RUFF_VERSION)
     session.run(
-        "isort",
-        "--fss",
-        "--profile=google",
+        "ruff",
+        "check",
+        "--fix",
         *LINT_PATHS,
     )
     session.run(
-        "black",
+        "ruff",
+        "format",
         *LINT_PATHS,
     )
 
diff --git a/pyproject.toml b/pyproject.toml
index b1bb87d5..89387b12 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,39 @@ version = { attr = "google.cloud.alloydbconnector.version.__version__" }
 # benchmarks, etc.
 include = ["google*"]
 
+[tool.ruff]
+line-length = 88
+target-version = "py310"
+exclude = [
+    "google/api/*",
+    "google/cloud/alloydb_connectors_v1/*",
+]
+
+[tool.ruff.lint]
+select = [
+    "E",   # pycodestyle errors
+    "F",   # pyflakes
+    "W",   # pycodestyle warnings
+    "I",   # isort
+    "ANN", # flake8-annotations
+]
+ignore = [
+    "E203",
+    "E231",
+    "E266",
+    "E501",
+    "ANN401",
+]
+
+[tool.ruff.lint.per-file-ignores]
+"noxfile.py" = ["ANN"]
+"tests/*" = ["ANN"]
+
+[tool.ruff.lint.isort]
+force-single-line = true
+force-sort-within-sections = true
+known-first-party = ["google"]
+
 [tool.mypy]
 python_version = "3.10"
 namespace_packages = true
diff --git a/tests/system/test_native_asyncpg_direct_connection.py b/tests/system/test_native_asyncpg_direct_connection.py
index 505d8024..38e7bf00 100644
--- a/tests/system/test_native_asyncpg_direct_connection.py
+++ b/tests/system/test_native_asyncpg_direct_connection.py
@@ -18,6 +18,7 @@
 
 # [START alloydb_native_asyncpg_connect_iam_authn_direct]
 import asyncpg
+
 import google.auth
 from google.auth.transport.requests import Request
 
diff --git a/tests/system/test_psycopg2_direct_connection.py b/tests/system/test_psycopg2_direct_connection.py
index dac3e319..1646b86d 100644
--- a/tests/system/test_psycopg2_direct_connection.py
+++ b/tests/system/test_psycopg2_direct_connection.py
@@ -16,12 +16,13 @@
 from datetime import datetime
 import os
 
+import sqlalchemy
+from sqlalchemy import event
+
 # [START alloydb_psycopg2_connect_iam_authn_direct]
 import google.auth
 from google.auth.credentials import Credentials
 from google.auth.transport.requests import Request
-import sqlalchemy
-from sqlalchemy import event
 
 # [END alloydb_psycopg2_connect_iam_authn_direct]
 
diff --git a/tests/system/test_sqlalchemy_asyncpg_direct_connection.py b/tests/system/test_sqlalchemy_asyncpg_direct_connection.py
index 59fd3cba..d69a2f0d 100644
--- a/tests/system/test_sqlalchemy_asyncpg_direct_connection.py
+++ b/tests/system/test_sqlalchemy_asyncpg_direct_connection.py
@@ -16,13 +16,14 @@
 from datetime import datetime
 import os
 
+import sqlalchemy
+from sqlalchemy import event
+from sqlalchemy.ext.asyncio import create_async_engine
+
 # [START alloydb_sqlalchemy_asyncpg_connect_iam_authn_direct]
 import google.auth
 from google.auth.credentials import Credentials
 from google.auth.transport.requests import Request
-import sqlalchemy
-from sqlalchemy import event
-from sqlalchemy.ext.asyncio import create_async_engine
 
 # [END alloydb_sqlalchemy_asyncpg_connect_iam_authn_direct]
 
diff --git a/tests/unit/mocks.py b/tests/unit/mocks.py
index 5bf6df57..5e254b0c 100644
--- a/tests/unit/mocks.py
+++ b/tests/unit/mocks.py
@@ -21,18 +21,22 @@
 import json
 import ssl
 import struct
-from typing import Any, Callable, Literal, Optional, Sequence
+from typing import Any
+from typing import Callable
+from typing import Literal
+from typing import Optional
+from typing import Sequence
 
 from cryptography import x509
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import rsa
 from cryptography.x509.oid import NameOID
-from google.auth.credentials import _helpers
+
 from google.auth.credentials import Scoped
 from google.auth.credentials import TokenState
+from google.auth.credentials import _helpers
 from google.auth.transport import requests
-
 from google.cloud import alloydb_v1beta
 import google.cloud.alloydb_connectors_v1.proto.resources_pb2 as connectorspb
 from google.cloud.alloydbconnector.connection_info import ConnectionInfo
diff --git a/tests/unit/test_async_connector.py b/tests/unit/test_async_connector.py
index 92a345b9..546b7a59 100644
--- a/tests/unit/test_async_connector.py
+++ b/tests/unit/test_async_connector.py
@@ -13,10 +13,9 @@
 # limitations under the License.
 
 import asyncio
-from typing import Any, Union
+from typing import Any
+from typing import Union
 
-from google.api_core.exceptions import RetryError
-from google.api_core.retry.retry_unary_async import AsyncRetry
 from mock import patch
 from mocks import FakeAlloyDBClient
 from mocks import FakeConnectionInfo
@@ -24,6 +23,8 @@
 from mocks import FakeCredentialsRequiresScopes
 import pytest
 
+from google.api_core.exceptions import RetryError
+from google.api_core.retry.retry_unary_async import AsyncRetry
 from google.cloud.alloydbconnector import AsyncConnector
 from google.cloud.alloydbconnector import IPTypes
 from google.cloud.alloydbconnector.client import AlloyDBClient
diff --git a/tests/unit/test_client.py b/tests/unit/test_client.py
index 2007b43e..208ca029 100644
--- a/tests/unit/test_client.py
+++ b/tests/unit/test_client.py
@@ -14,12 +14,12 @@
 
 from typing import Optional
 
-import google.cloud.alloydb_v1beta as v1beta
 from mocks import FakeAlloyDBAdminAsyncClient
 from mocks import FakeAlloyDBAdminClient
 from mocks import FakeCredentials
 import pytest
 
+import google.cloud.alloydb_v1beta as v1beta
 from google.cloud.alloydbconnector.client import AlloyDBClient
 from google.cloud.alloydbconnector.utils import generate_keys
 from google.cloud.alloydbconnector.version import __version__ as version
diff --git a/tests/unit/test_connection_info.py b/tests/unit/test_connection_info.py
index 1607e331..86bfed71 100644
--- a/tests/unit/test_connection_info.py
+++ b/tests/unit/test_connection_info.py
@@ -105,7 +105,9 @@ async def test_ConnectionInfo_get_preferred_ip(ip_type: IPTypes, expected: str)
     assert ip_address == expected
 
 
-async def test_ConnectionInfo_get_preferred_ip_IPTypeNotFoundError_when_ip_type_not_exist() -> None:
+async def test_ConnectionInfo_get_preferred_ip_IPTypeNotFoundError_when_ip_type_not_exist() -> (
+    None
+):
     """Test that ConnectionInfo.get_preferred_ip throws IPTypeNotFoundError"""
     conn_info = ConnectionInfo(
         ["cert"],
@@ -119,7 +121,9 @@ async def test_ConnectionInfo_get_preferred_ip_IPTypeNotFoundError_when_ip_type_
         conn_info.get_preferred_ip(ip_type=IPTypes.PUBLIC)
 
 
-async def test_ConnectionInfo_get_preferred_ip_IPTypeNotFoundError_when_empty_value() -> None:
+async def test_ConnectionInfo_get_preferred_ip_IPTypeNotFoundError_when_empty_value() -> (
+    None
+):
     """Test that ConnectionInfo.get_preferred_ip throws IPTypeNotFoundError"""
     conn_info = ConnectionInfo(
         ["cert"],
diff --git a/tests/unit/test_connector.py b/tests/unit/test_connector.py
index 5729be1e..c5d366eb 100644
--- a/tests/unit/test_connector.py
+++ b/tests/unit/test_connector.py
@@ -16,8 +16,6 @@
 from threading import Thread
 from typing import Union
 
-from google.api_core.exceptions import RetryError
-from google.api_core.retry.retry_unary import Retry
 from mock import patch
 from mocks import FakeAlloyDBClient
 from mocks import FakeCredentials
@@ -25,6 +23,8 @@
 from mocks import write_static_info
 import pytest
 
+from google.api_core.exceptions import RetryError
+from google.api_core.retry.retry_unary import Retry
 from google.cloud.alloydbconnector import Connector
 from google.cloud.alloydbconnector import IPTypes
 from google.cloud.alloydbconnector.client import AlloyDBClient
diff --git a/tests/unit/test_instance.py b/tests/unit/test_instance.py
index b643d836..a1ebae84 100644
--- a/tests/unit/test_instance.py
+++ b/tests/unit/test_instance.py
@@ -21,8 +21,8 @@
 
 from google.cloud.alloydbconnector.connection_info import ConnectionInfo
 from google.cloud.alloydbconnector.exceptions import RefreshError
-from google.cloud.alloydbconnector.instance import _parse_instance_uri
 from google.cloud.alloydbconnector.instance import RefreshAheadCache
+from google.cloud.alloydbconnector.instance import _parse_instance_uri
 from google.cloud.alloydbconnector.refresh_utils import _is_valid
 from google.cloud.alloydbconnector.utils import generate_keys