diff --git a/jax/experimental/mosaic/gpu/examples/BUILD b/jax/experimental/mosaic/gpu/examples/BUILD
index fe1a7e9180ac..33b6d015c609 100644
--- a/jax/experimental/mosaic/gpu/examples/BUILD
+++ b/jax/experimental/mosaic/gpu/examples/BUILD
@@ -48,6 +48,8 @@ py_library(
     ],
 )
 
+# brain
+# learning/brain/
 jax_multiplatform_test(
     name = "run_matmul",
     srcs = ["matmul.py"],