diff --git a/tests/prague/eip7685_general_purpose_el_requests/conftest.py b/tests/prague/eip7685_general_purpose_el_requests/conftest.py
index ce866ae22a0..0e969beabbd 100644
--- a/tests/prague/eip7685_general_purpose_el_requests/conftest.py
+++ b/tests/prague/eip7685_general_purpose_el_requests/conftest.py
@@ -5,7 +5,15 @@
 import pytest
 
 from ethereum_test_forks import Fork
-from ethereum_test_tools import Alloc, Block, BlockException, Bytes, Header, Requests
+from ethereum_test_tools import (
+    Alloc,
+    Block,
+    BlockException,
+    Bytes,
+    EngineAPIError,
+    Header,
+    Requests,
+)
 
 from ..eip6110_deposits.helpers import DepositInteractionBase, DepositRequest
 from ..eip7002_el_triggerable_withdrawals.helpers import (
@@ -50,6 +58,26 @@ def exception() -> BlockException | None:
     return None
 
 
+@pytest.fixture
+def engine_api_error_code(
+    block_body_override_requests: List[Bytes | SupportsBytes] | None,
+) -> EngineAPIError | None:
+    """Engine API error code if any."""
+    if block_body_override_requests is None:
+        return None
+    block_body_override_requests_bytes = [bytes(r) for r in block_body_override_requests]
+    if any(len(r) <= 1 for r in block_body_override_requests_bytes):
+        return EngineAPIError.InvalidParams
+
+    def is_monotonically_increasing(requests: List[bytes]) -> bool:
+        return all(x[0] < y[0] for x, y in zip(requests, requests[1:], strict=False))
+
+    if not is_monotonically_increasing(block_body_override_requests_bytes):
+        return EngineAPIError.InvalidParams
+
+    return None
+
+
 @pytest.fixture
 def blocks(
     fork: Fork,
@@ -59,10 +87,11 @@ def blocks(
         | WithdrawalRequestInteractionBase
         | ConsolidationRequestInteractionBase
     ],
-    block_body_override_requests: (List[Bytes | SupportsBytes] | None),
+    block_body_override_requests: List[Bytes | SupportsBytes] | None,
     block_body_extra_requests: List[SupportsBytes],
     correct_requests_hash_in_header: bool,
     exception: BlockException | None,
+    engine_api_error_code: EngineAPIError | None,
 ) -> List[Block]:
     """List of blocks that comprise the test."""
     valid_requests_list: List[DepositRequest | WithdrawalRequest | ConsolidationRequest] = []
@@ -95,5 +124,6 @@ def blocks(
             requests=block_body_override_requests,
             exception=exception,
             rlp_modifier=rlp_modifier,
+            engine_api_error_code=engine_api_error_code,
         )
     ]
diff --git a/tests/prague/eip7685_general_purpose_el_requests/test_deposits_withdrawals_consolidations.py b/tests/prague/eip7685_general_purpose_el_requests/test_deposits_withdrawals_consolidations.py
index cc395d88b80..bd32cecb5d4 100644
--- a/tests/prague/eip7685_general_purpose_el_requests/test_deposits_withdrawals_consolidations.py
+++ b/tests/prague/eip7685_general_purpose_el_requests/test_deposits_withdrawals_consolidations.py
@@ -331,6 +331,8 @@ def invalid_requests_block_combinations(fork: Fork) -> List[Any]:
 
     In the event of a new request type, the `all_request_types` dictionary should be updated
     with the new request type and its corresponding request-generating transaction.
+
+    Returned parameters are: requests, block_body_override_requests, exception
     """
     assert fork.max_request_type() == 2, "Test update is needed for new request types"
 
diff --git a/tests/prague/eip7685_general_purpose_el_requests/test_request_types.py b/tests/prague/eip7685_general_purpose_el_requests/test_request_types.py
index 89d9df6f4dc..e151868ccfd 100644
--- a/tests/prague/eip7685_general_purpose_el_requests/test_request_types.py
+++ b/tests/prague/eip7685_general_purpose_el_requests/test_request_types.py
@@ -29,7 +29,11 @@
 
 @pytest.fixture
 def block_body_extra_requests(fork: Fork, invalid_request_data: bytes) -> List[bytes]:
-    """List of requests that overwrite the requests in the header. None by default."""
+    """
+    Create a request with an invalid type for the fork.
+
+    This overrides the default fixture and its behavior defined in conftest.py.
+    """
     invalid_request_type = fork.max_request_type() + 1
     return [bytes([invalid_request_type]) + invalid_request_data]