diff --git a/src/ethereum_test_tools/code/yul.py b/src/ethereum_test_tools/code/yul.py
index fb478e5557..554f4e74d5 100644
--- a/src/ethereum_test_tools/code/yul.py
+++ b/src/ethereum_test_tools/code/yul.py
@@ -42,7 +42,7 @@ def assemble(self) -> bytes:
             )
 
             if result.returncode != 0:
-                raise Exception("failed to compile yul source")
+                raise Exception("failed to compile yul source: " + self.source)
 
             lines = result.stdout.decode().split("\n")