diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index 993aa6802fe..44e5de0fa3b 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -3063,6 +3063,7 @@ fn run(self, builder: &Builder<'_>) {
         // FIXME handle vendoring for source tarballs before removing the --skip-test below
         let download_dir = builder.out.join("cg_clif_download");
 
+        // Uncomment the `prepare` command below once vendoring is implemented.
         /*
         let mut prepare_cargo = build_cargo();
         prepare_cargo.arg("--").arg("prepare").arg("--download-dir").arg(&download_dir);
@@ -3194,6 +3195,7 @@ fn run(self, builder: &Builder<'_>) {
         ));
         let _time = helpers::timeit(&builder);
 
+        // Uncomment the `prepare` command below once vendoring is implemented.
         /*
         let mut prepare_cargo = build_cargo();
         prepare_cargo.arg("--").arg("prepare");