diff --git a/docs/write_source_files.md b/docs/write_source_files.md
index 09c5d930f..1e7d4341f 100644
--- a/docs/write_source_files.md
+++ b/docs/write_source_files.md
@@ -13,7 +13,7 @@ write_source_file(<a href="#write_source_file-name">name</a>, <a href="#write_so
 
 Write a file or directory to the source tree.
 
-By default, `diff_test` targets are generated that ensure the source tree file or directory to be written to
+By default, a `diff_test` target ("{name}_test") is generated that ensure the source tree file or directory to be written to
 is up to date and the rule also checks that the source tree file or directory to be written to exists.
 To disable the exists check and up-to-date test set `diff_test` to `False`.
 
diff --git a/lib/private/write_source_file.bzl b/lib/private/write_source_file.bzl
index c08a411a7..8f2c2692d 100644
--- a/lib/private/write_source_file.bzl
+++ b/lib/private/write_source_file.bzl
@@ -23,7 +23,7 @@ def write_source_file(
         **kwargs):
     """Write a file or directory to the source tree.
 
-    By default, `diff_test` targets are generated that ensure the source tree file or directory to be written to
+    By default, a `diff_test` target ("{name}_test") is generated that ensure the source tree file or directory to be written to
     is up to date and the rule also checks that the source tree file or directory to be written to exists.
     To disable the exists check and up-to-date test set `diff_test` to `False`.