diff --git a/test_libs/pyspec/tests/block_processing/test_process_transfer.py b/test_libs/pyspec/tests/block_processing/test_process_transfer.py
index df49aff98..71d0894bd 100644
--- a/test_libs/pyspec/tests/block_processing/test_process_transfer.py
+++ b/test_libs/pyspec/tests/block_processing/test_process_transfer.py
@@ -52,7 +52,7 @@ def run_transfer_processing(state, transfer, valid=True):
 def test_success_non_activated(state):
     transfer = get_valid_transfer(state)
     # un-activate so validator can transfer
-    state.validator_registry[transfer.sender].activation_epoch = spec.FAR_FUTURE_EPOCH
+    state.validator_registry[transfer.sender].activation_eligibility_epoch = spec.FAR_FUTURE_EPOCH
 
     pre_state, post_state = run_transfer_processing(state, transfer)
 
diff --git a/test_libs/pyspec/tests/test_sanity.py b/test_libs/pyspec/tests/test_sanity.py
index ee4ab405d..2004a2f25 100644
--- a/test_libs/pyspec/tests/test_sanity.py
+++ b/test_libs/pyspec/tests/test_sanity.py
@@ -442,7 +442,7 @@ def test_transfer(state):
         spec.BLS_WITHDRAWAL_PREFIX_BYTE + hash(transfer_pubkey)[1:]
     )
     # un-activate so validator can transfer
-    pre_state.validator_registry[sender_index].activation_epoch = spec.FAR_FUTURE_EPOCH
+    pre_state.validator_registry[sender_index].activation_eligibility_epoch = spec.FAR_FUTURE_EPOCH
 
     post_state = deepcopy(pre_state)
     #