diff --git a/packages/google-cloud-dlp/.pre-commit-config.yaml b/packages/google-cloud-dlp/.pre-commit-config.yaml
new file mode 100644
index 000000000000..6ad83346e261
--- /dev/null
+++ b/packages/google-cloud-dlp/.pre-commit-config.yaml
@@ -0,0 +1,17 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.3.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+-   repo: https://github.com/psf/black
+    rev: 19.10b0
+    hooks:
+    - id: black
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.4
+    hooks:
+    - id: flake8
diff --git a/packages/google-cloud-dlp/CONTRIBUTING.rst b/packages/google-cloud-dlp/CONTRIBUTING.rst
index 87ac6da720b0..d24b991a537c 100644
--- a/packages/google-cloud-dlp/CONTRIBUTING.rst
+++ b/packages/google-cloud-dlp/CONTRIBUTING.rst
@@ -111,6 +111,16 @@ Coding Style
   should point to the official ``googleapis`` checkout and the
   the branch should be the main branch on that remote (``master``).
 
+- This repository contains configuration for the
+  `pre-commit <https://pre-commit.com/>`__ tool, which automates checking
+  our linters during a commit.  If you have it installed on your ``$PATH``,
+  you can enable enforcing those checks via:
+
+.. code-block:: bash
+
+   $ pre-commit install
+   pre-commit installed at .git/hooks/pre-commit
+
 Exceptions to PEP8:
 
 - Many unit tests use a helper method, ``_call_fut`` ("FUT" is short for
diff --git a/packages/google-cloud-dlp/docs/conf.py b/packages/google-cloud-dlp/docs/conf.py
index b6f3b255864e..10dd0aa8249f 100644
--- a/packages/google-cloud-dlp/docs/conf.py
+++ b/packages/google-cloud-dlp/docs/conf.py
@@ -339,10 +339,10 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    "python": ("http://python.readthedocs.org/en/latest/", None),
-    "google-auth": ("https://google-auth.readthedocs.io/en/stable", None),
+    "python": ("https://python.readthedocs.org/en/latest/", None),
+    "google-auth": ("https://googleapis.dev/python/google-auth/latest/", None),
     "google.api_core": ("https://googleapis.dev/python/google-api-core/latest/", None,),
-    "grpc": ("https://grpc.io/grpc/python/", None),
+    "grpc": ("https://grpc.github.io/grpc/python/", None),
     "proto-plus": ("https://proto-plus-python.readthedocs.io/en/latest/", None),
 }
 
diff --git a/packages/google-cloud-dlp/noxfile.py b/packages/google-cloud-dlp/noxfile.py
index b776ccc5e212..25452f0bf0c9 100644
--- a/packages/google-cloud-dlp/noxfile.py
+++ b/packages/google-cloud-dlp/noxfile.py
@@ -81,9 +81,8 @@ def default(session):
     session.run(
         "py.test",
         "--quiet",
-        "--cov=google.cloud.dlp",
-        "--cov=google.cloud",
-        "--cov=tests.unit",
+        "--cov=google/cloud",
+        "--cov=tests/unit",
         "--cov-append",
         "--cov-config=.coveragerc",
         "--cov-report=",
diff --git a/packages/google-cloud-dlp/samples/snippets/noxfile.py b/packages/google-cloud-dlp/samples/snippets/noxfile.py
index b90eef00f2d9..bca0522ec4d9 100644
--- a/packages/google-cloud-dlp/samples/snippets/noxfile.py
+++ b/packages/google-cloud-dlp/samples/snippets/noxfile.py
@@ -17,6 +17,7 @@
 import os
 from pathlib import Path
 import sys
+from typing import Callable, Dict, List, Optional
 
 import nox
 
@@ -68,7 +69,7 @@
 TEST_CONFIG.update(TEST_CONFIG_OVERRIDE)
 
 
-def get_pytest_env_vars():
+def get_pytest_env_vars() -> Dict[str, str]:
     """Returns a dict for pytest invocation."""
     ret = {}
 
@@ -97,7 +98,7 @@ def get_pytest_env_vars():
 #
 
 
-def _determine_local_import_names(start_dir):
+def _determine_local_import_names(start_dir: str) -> List[str]:
     """Determines all import names that should be considered "local".
 
     This is used when running the linter to insure that import order is
@@ -135,7 +136,7 @@ def _determine_local_import_names(start_dir):
 
 
 @nox.session
-def lint(session):
+def lint(session: nox.sessions.Session) -> None:
     if not TEST_CONFIG['enforce_type_hints']:
         session.install("flake8", "flake8-import-order")
     else:
@@ -154,7 +155,7 @@ def lint(session):
 
 
 @nox.session
-def blacken(session):
+def blacken(session: nox.sessions.Session) -> None:
     session.install("black")
     python_files = [path for path in os.listdir(".") if path.endswith(".py")]
 
@@ -168,7 +169,7 @@ def blacken(session):
 PYTEST_COMMON_ARGS = ["--junitxml=sponge_log.xml"]
 
 
-def _session_tests(session, post_install=None):
+def _session_tests(session: nox.sessions.Session, post_install: Callable = None) -> None:
     """Runs py.test for a particular project."""
     if os.path.exists("requirements.txt"):
         session.install("-r", "requirements.txt")
@@ -194,7 +195,7 @@ def _session_tests(session, post_install=None):
 
 
 @nox.session(python=ALL_VERSIONS)
-def py(session):
+def py(session: nox.sessions.Session) -> None:
     """Runs py.test for a sample using the specified version of Python."""
     if session.python in TESTED_VERSIONS:
         _session_tests(session)
@@ -209,7 +210,7 @@ def py(session):
 #
 
 
-def _get_repo_root():
+def _get_repo_root() -> Optional[str]:
     """ Returns the root folder of the project. """
     # Get root of this repository. Assume we don't have directories nested deeper than 10 items.
     p = Path(os.getcwd())
@@ -232,7 +233,7 @@ def _get_repo_root():
 
 @nox.session
 @nox.parametrize("path", GENERATED_READMES)
-def readmegen(session, path):
+def readmegen(session: nox.sessions.Session, path: str) -> None:
     """(Re-)generates the readme for a sample."""
     session.install("jinja2", "pyyaml")
     dir_ = os.path.dirname(path)
diff --git a/packages/google-cloud-dlp/synth.metadata b/packages/google-cloud-dlp/synth.metadata
index 4b5709f0cd3a..860283d86941 100644
--- a/packages/google-cloud-dlp/synth.metadata
+++ b/packages/google-cloud-dlp/synth.metadata
@@ -19,14 +19,14 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "e89175cf074dccc4babb4eca66ae913696e47a71"
+        "sha": "18c5dbdb4ac8cf75d4d8174e7b4558f48e76f8a1"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "e89175cf074dccc4babb4eca66ae913696e47a71"
+        "sha": "18c5dbdb4ac8cf75d4d8174e7b4558f48e76f8a1"
       }
     }
   ],
@@ -85,6 +85,7 @@
     ".kokoro/test-samples.sh",
     ".kokoro/trampoline.sh",
     ".kokoro/trampoline_v2.sh",
+    ".pre-commit-config.yaml",
     ".trampolinerc",
     "CODE_OF_CONDUCT.md",
     "CONTRIBUTING.rst",