diff --git a/t/t1510-repo-setup.sh b/t/t1510-repo-setup.sh
index 13ae12dfa7..e6854b828e 100755
--- a/t/t1510-repo-setup.sh
+++ b/t/t1510-repo-setup.sh
@@ -39,6 +39,10 @@ A few rules for repo setup:
 11. When user's cwd is outside worktree, cwd remains unchanged,
     prefix is NULL.
 "
+
+# This test heavily relies on the standard error of nested function calls.
+test_untraceable=UnfortunatelyYes
+
 . ./test-lib.sh
 
 here=$(pwd)