diff --git a/noxfile.py b/noxfile.py
index d9883d069..0b0800d35 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -25,7 +25,15 @@
 MYPY_VERSION = "mypy==0.910"
 PYTYPE_VERSION = "pytype==2021.4.9"
 BLACK_VERSION = "black==22.3.0"
-BLACK_PATHS = ("docs", "google", "samples", "tests", "noxfile.py", "setup.py")
+BLACK_PATHS = (
+    "docs",
+    "google",
+    "samples",
+    "samples/tests",
+    "tests",
+    "noxfile.py",
+    "setup.py",
+)
 
 DEFAULT_PYTHON_VERSION = "3.8"
 SYSTEM_TEST_PYTHON_VERSIONS = ["3.8", "3.10"]
diff --git a/owlbot.py b/owlbot.py
index 4d287ac46..b887449ff 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -13,12 +13,15 @@
 # limitations under the License.
 
 """This script is used to synthesize generated parts of this library."""
+from pathlib import Path
 import textwrap
 
 import synthtool as s
 from synthtool import gcp
 from synthtool.languages import python
 
+REPO_ROOT = Path(__file__).parent.absolute()
+
 default_version = "v2"
 
 for library in s.get_staging_dirs(default_version):
@@ -120,4 +123,6 @@
     ),
 )
 
-s.shell.run(["nox", "-s", "blacken"], hide_output=False)
+# s.shell.run(["nox", "-s", "blacken"], hide_output=False)
+for noxfile in REPO_ROOT.glob("samples/**/noxfile.py"):
+    s.shell.run(["nox", "-s", "blacken"], cwd=noxfile.parent, hide_output=False)
\ No newline at end of file