diff --git a/pw_build/test_data/pw_copy_and_patch_file/basic.txt b/pw_build/test_data/pw_copy_and_patch_file/basic.txt
index 9b834f04d..eeac2c56e 100644
--- a/pw_build/test_data/pw_copy_and_patch_file/basic.txt
+++ b/pw_build/test_data/pw_copy_and_patch_file/basic.txt
@@ -1,2 +1,3 @@
 aaa
+bb
 c