diff --git a/packages/google-cloud-dlp/synth.py b/packages/google-cloud-dlp/synth.py
index 97094534612d..d1dbee2e8bc2 100644
--- a/packages/google-cloud-dlp/synth.py
+++ b/packages/google-cloud-dlp/synth.py
@@ -257,3 +257,5 @@
 # ----------------------------------------------------------------------------
 templated_files = common.py_library(unit_cov_level=97, cov_level=100)
 s.move(templated_files)
+
+s.shell.run(["nox", "-s", "blacken"], hide_output=False)