1 files changed, 1 insertions, 0 deletions
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index e55773011df..c50e6a27033 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1934,6 +1934,7 @@ impl Step for Distcheck {
                 .arg("generate-lockfile")
                 .arg("--manifest-path")
                 .arg(&toml)
+                .env("__CARGO_TEST_ROOT", &dir)
                 .current_dir(&dir),
         );
     }