diff --git a/tests/utils.py b/tests/utils.py
deleted file mode 100644
index 7eda07e..0000000
--- a/tests/utils.py
+++ /dev/null
@@ -1,7 +0,0 @@
-from typing import Any
-
-
-def safe_id(x: Any) -> str:
-    if not x or not isinstance(x, (tuple, list)) or len(x) == 0:
-        return "no_test_cases"
-    return str(x[0])