diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
index e5824010ef2..00b30a00b03 100644
--- a/src/bootstrap/builder.rs
+++ b/src/bootstrap/builder.rs
@@ -1461,6 +1461,7 @@ mod __test {
             rustc_args: vec![],
             fail_fast: true,
             doc_tests: DocTests::No,
+            bless: false,
         };
 
         let build = Build::new(config);