Bump the rust-lang/rust commit we test against
diff --git a/tests/clone.sh b/tests/clone.sh
index d3dac1f..0b6fe94 100755
--- a/tests/clone.sh
+++ b/tests/clone.sh
@@ -2,7 +2,7 @@
 
 REMOTE=rust
 REPO=https://github.com/rust-lang/rust
-REV=ebddfcb0b19471d2277e05cfbc2ad8caa81637b7
+REV=9af8d42ec79558225043189e429e9d652ff89eab
 
 set -euo pipefail
 cd "$(dirname "${BASH_SOURCE[0]}")"