diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index a77ec77a3..c70fc006e 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -1093,7 +1093,7 @@ def slash_validator(state: BeaconState,
 ### Genesis trigger
 
 Before genesis has been triggered and for every Ethereum 1.0 block call `is_genesis_trigger(deposits: Sequence[Deposit], timestamp: uint64) -> bool` where:
-* `deposits` is the SSZ list of all deposits, ordered chronologically, up to and including the deposit triggering the latest `Deposit` log
+* `deposits` is the list of all deposits, ordered chronologically, up to and including the deposit triggering the latest `Deposit` log
 * `timestamp` is the Unix timestamp in the Ethereum 1.0 block that emitted the latest `Deposit` log
 
 When `is_genesis_trigger(deposits, timestamp) is True` for the first time, let:
@@ -1105,7 +1105,7 @@ When `is_genesis_trigger(deposits, timestamp) is True` for the first time, let:
 *Note*: The function `is_genesis_trigger` has yet to be agreed upon by the community, and can be updated as necessary. We define the following testing placeholder:
 
 ```python
-def is_genesis_trigger(deposits: List[Deposit, 2**DEPOSIT_CONTRACT_TREE_DEPTH], timestamp: uint64) -> bool:
+def is_genesis_trigger(deposits: Sequence[Deposit], timestamp: uint64) -> bool:
     SECONDS_PER_DAY = 86400
     # Do not deploy too early
     if timestamp - timestamp % SECONDS_PER_DAY + 2 * SECONDS_PER_DAY < MIN_GENESIS_TIME:
@@ -1137,7 +1137,7 @@ def is_genesis_trigger(deposits: List[Deposit, 2**DEPOSIT_CONTRACT_TREE_DEPTH],
 Let `genesis_state = get_genesis_beacon_state(genesis_deposits, genesis_time, genesis_eth1_block_hash)`.
 
 ```python
-def get_genesis_beacon_state(deposits: List[Deposit, 2**DEPOSIT_CONTRACT_TREE_DEPTH],
+def get_genesis_beacon_state(deposits: Sequence[Deposit],
                              genesis_time: int,
                              genesis_eth1_block_hash: Hash) -> BeaconState:
     state = BeaconState(
diff --git a/test_libs/pyspec/eth2spec/test/helpers/deposits.py b/test_libs/pyspec/eth2spec/test/helpers/deposits.py
index f79dcf3ff..b46363e62 100644
--- a/test_libs/pyspec/eth2spec/test/helpers/deposits.py
+++ b/test_libs/pyspec/eth2spec/test/helpers/deposits.py
@@ -75,7 +75,7 @@ def prepare_genesis_deposits(spec, genesis_validator_count, amount, signed=False
         )
         genesis_deposits.append(deposit)
 
-    return List[spec.Deposit, 2**spec.DEPOSIT_CONTRACT_TREE_DEPTH](*genesis_deposits), root
+    return genesis_deposits, root
 
 
 def prepare_state_and_deposit(spec, state, validator_index, amount, withdrawal_credentials=None, signed=False):