diff --git a/packages/google-cloud-secret-manager/.github/header-checker-lint.yml b/packages/google-cloud-secret-manager/.github/header-checker-lint.yml
new file mode 100644
index 000000000000..fc281c05bd55
--- /dev/null
+++ b/packages/google-cloud-secret-manager/.github/header-checker-lint.yml
@@ -0,0 +1,15 @@
+{"allowedCopyrightHolders": ["Google LLC"],
+ "allowedLicenses": ["Apache-2.0", "MIT", "BSD-3"],
+ "ignoreFiles": ["**/requirements.txt", "**/requirements-test.txt"],
+ "sourceFileExtensions": [
+ 	"ts", 
+ 	"js", 
+ 	"java", 
+ 	"sh", 
+ 	"Dockerfile", 
+ 	"yaml", 
+ 	"py",
+ 	"html",
+ 	"txt"
+ ]
+}
\ No newline at end of file
diff --git a/packages/google-cloud-secret-manager/noxfile.py b/packages/google-cloud-secret-manager/noxfile.py
index 32a8bcfa5f9d..2c4b84df22c2 100644
--- a/packages/google-cloud-secret-manager/noxfile.py
+++ b/packages/google-cloud-secret-manager/noxfile.py
@@ -86,6 +86,7 @@ def default(session):
     session.install(
         "mock", "pytest", "pytest-cov",
     )
+
     session.install("-e", ".")
 
     # Run py.test against the unit tests.
diff --git a/packages/google-cloud-secret-manager/synth.metadata b/packages/google-cloud-secret-manager/synth.metadata
index c78eabda3048..c3b67d48e633 100644
--- a/packages/google-cloud-secret-manager/synth.metadata
+++ b/packages/google-cloud-secret-manager/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-secret-manager.git",
-        "sha": "9a2eef65040dbe52d2b23db02640d113c26e1297"
+        "sha": "eb0c748bb930f35c4cfeedceebab9fd6ec6a13ad"
       }
     },
     {
@@ -19,14 +19,14 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "ba960d730416fe05c50547e975ce79fcee52c671"
+        "sha": "778d8beae28d6d87eb01fdc839a4b4d966ed2ebe"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "ba960d730416fe05c50547e975ce79fcee52c671"
+        "sha": "778d8beae28d6d87eb01fdc839a4b4d966ed2ebe"
       }
     }
   ],
@@ -58,6 +58,7 @@
     ".github/ISSUE_TEMPLATE/feature_request.md",
     ".github/ISSUE_TEMPLATE/support_request.md",
     ".github/PULL_REQUEST_TEMPLATE.md",
+    ".github/header-checker-lint.yml",
     ".github/release-please.yml",
     ".github/snippet-bot.yml",
     ".gitignore",