diff --git a/tests/BUILD.bazel b/tests/BUILD.bazel
index 5b5e06e56..30210a829 100644
--- a/tests/BUILD.bazel
+++ b/tests/BUILD.bazel
@@ -134,6 +134,7 @@ sh_test(
         "//conditions:default": [],
     }),
     target_compatible_with = [
+        # busybox_static is not available on MacOS.
         "@platforms//os:linux",
     ],
 )