diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 0f2bab30b2..b8ef3a9792 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -11,6 +11,7 @@ Test fixtures for use by clients are available for each release on the [Github r
 ### 🛠️ Framework
 
 - 🐞 Remove `Op.CLZ` from `UndefinedOpcodes` list ([#1970](https://github.com/ethereum/execution-specs/pull/1970)).
+- 🐞 Make `TransactionTraces` `CamelModel` less lestrictive ([#2081](https://github.com/ethereum/execution-specs/pull/2081)).
 
 #### `fill`
 
diff --git a/packages/testing/src/execution_testing/client_clis/cli_types.py b/packages/testing/src/execution_testing/client_clis/cli_types.py
index ea79c7554b..333e110358 100644
--- a/packages/testing/src/execution_testing/client_clis/cli_types.py
+++ b/packages/testing/src/execution_testing/client_clis/cli_types.py
@@ -99,6 +99,8 @@ def are_equivalent(self, other: Self) -> bool:
 class TransactionTraces(CamelModel):
     """Traces of a single transaction."""
 
+    model_config = CamelModel.model_config | {"extra": "ignore"}
+
     traces: List[TraceLine]
     output: str | None = None
     gas_used: HexNumber | None = None