Update test suite to nightly-2018-10-28
diff --git a/tests/clone.sh b/tests/clone.sh
index 082465c..e2c83af 100755
--- a/tests/clone.sh
+++ b/tests/clone.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-REV=4591a245c7eec9f70d668982b1383cd2a6854af5
+REV=cae6efc37d70ab7d353e6ab9ce229d59a65ed643
 
 set -euo pipefail
 cd "$(dirname "${BASH_SOURCE[0]}")"