diff --git a/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload.py b/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload.py
index ea93640583..1cfe4b1631 100644
--- a/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload.py
+++ b/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload.py
@@ -676,6 +676,40 @@ def test_process_execution_payload_wrong_blob_commitments_root(spec, state):
     yield from run_execution_payload_processing(spec, state, signed_envelope, valid=False)
 
 
+@with_gloas_and_later
+@spec_state_test
+@always_bls
+def test_process_execution_payload_missing_expected_withdrawal(spec, state):
+    """
+    Verify payload rejected when it omits a withdrawal expected by the state.
+    """
+    builder_index = 0
+
+    setup_state_with_payload_bid(spec, state, builder_index, spec.Gwei(2600000))
+
+    execution_payload = build_empty_execution_payload(spec, state)
+    execution_payload.block_hash = state.latest_execution_payload_bid.block_hash
+    execution_payload.gas_limit = state.latest_execution_payload_bid.gas_limit
+    execution_payload.parent_hash = state.latest_block_hash
+
+    withdrawal = spec.Withdrawal(
+        index=0,
+        validator_index=0,
+        address=b"\x22" * 20,
+        amount=spec.Gwei(1),
+    )
+    state.payload_expected_withdrawals = spec.List[
+        spec.Withdrawal, spec.MAX_WITHDRAWALS_PER_PAYLOAD
+    ]([withdrawal])
+    execution_payload.withdrawals = spec.List[spec.Withdrawal, spec.MAX_WITHDRAWALS_PER_PAYLOAD]()
+
+    signed_envelope = prepare_execution_payload_envelope(
+        spec, state, builder_index=builder_index, execution_payload=execution_payload
+    )
+
+    yield from run_execution_payload_processing(spec, state, signed_envelope, valid=False)
+
+
 @with_gloas_and_later
 @spec_state_test
 @always_bls
diff --git a/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload_bid.py b/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload_bid.py
index 1e74795edf..3247846f42 100644
--- a/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload_bid.py
+++ b/tests/core/pyspec/eth2spec/test/gloas/block_processing/test_process_execution_payload_bid.py
@@ -60,7 +60,7 @@ def prepare_signed_execution_payload_bid(
     spec.process_slots(state, slot)
 
     if builder_index is None:
-        builder_index = spec.get_beacon_proposer_index(state)
+        builder_index = spec.BUILDER_INDEX_SELF_BUILD
 
     if parent_block_hash is None:
         parent_block_hash = state.latest_block_hash