diff --git a/9_Firmware/tests/cross_layer/contract_parser.py b/9_Firmware/tests/cross_layer/contract_parser.py
index a0220ff..fa2b17f 100644
--- a/9_Firmware/tests/cross_layer/contract_parser.py
+++ b/9_Firmware/tests/cross_layer/contract_parser.py
@@ -497,6 +497,7 @@ def count_concat_bits(concat_expr: str, port_widths: dict[str, int]) -> ConcatWi
             # Unknown width — flag it
             fragments.append((part, -1))
             total = -1  # Can't compute
+            break
 
     return ConcatWidth(
         total_bits=total,