diff --git a/meta-ohos-core/recipes-core/images/allscenarios-image-extra-tests.bb b/meta-ohos-core/recipes-core/images/allscenarios-image-extra-tests.bb
index 7f45beb958dcfbe65f118daae93d99c20b921460..6400bcf024a0b7c5348c3a3e80cf26ec4ebcd521 100644
--- a/meta-ohos-core/recipes-core/images/allscenarios-image-extra-tests.bb
+++ b/meta-ohos-core/recipes-core/images/allscenarios-image-extra-tests.bb
@@ -14,5 +14,6 @@ IMAGE_INSTALL_append = "\
 # This adds ptest packages to the image
 EXTRA_IMAGE_FEATURES_append = " ptest-pkgs"
 
-# For testing purposes we want the ability to have a writable filesystem
+# For testing purposes, we want to have an extra ext4 format for the root
+# filesystem.
 IMAGE_FSTYPES_append = " ext4"