diff --git a/security/advancedtls/testdata/testdata.go b/security/advancedtls/testdata/testdata.go
index c7d2481c4a03..25dfccb1e383 100644
--- a/security/advancedtls/testdata/testdata.go
+++ b/security/advancedtls/testdata/testdata.go
@@ -15,6 +15,7 @@
  *
  */
 
+// Package testdata contains functionality to find data files in tests.
 package testdata
 
 import (