diff --git a/deposit_contract/tests/contracts/conftest.py b/deposit_contract/tests/contracts/conftest.py
index b8b488abe..d4c7da9aa 100644
--- a/deposit_contract/tests/contracts/conftest.py
+++ b/deposit_contract/tests/contracts/conftest.py
@@ -62,26 +62,6 @@ def registration_contract(w3, tester):
     return registration_deployed
 
 
-@pytest.fixture(params=[0, 1, 2])
-def modified_registration_contract(
-        request,
-        w3,
-        tester):
-    registration_code = get_deposit_contract_code()
-    contract_bytecode = compiler.compile_code(registration_code)['bytecode']
-    contract_abi = compiler.mk_full_signature(registration_code)
-    registration = w3.eth.contract(
-        abi=contract_abi,
-        bytecode=contract_bytecode)
-    tx_hash = registration.constructor().transact()
-    tx_receipt = w3.eth.waitForTransactionReceipt(tx_hash)
-    registration_deployed = w3.eth.contract(
-        address=tx_receipt.contractAddress,
-        abi=contract_abi
-    )
-    return registration_deployed
-
-
 @pytest.fixture
 def assert_tx_failed(tester):
     def assert_tx_failed(function_to_test, exception=eth_tester.exceptions.TransactionFailed):
diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index fa15bc5dc..61729e8d9 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -1166,7 +1166,7 @@ Before genesis has been triggered and whenever the deposit contract emits a `Dep
 When `is_genesis_trigger(deposits, timestamp) is True` for the first time let:
 
 * `genesis_deposits = deposits`
-* `genesis_time = timestamp % SECONDS_PER_DAY + 2 * SECONDS_PER_DAY` where `SECONDS_PER_DAY = 86400`
+* `genesis_time = timestamp - timestamp % SECONDS_PER_DAY + 2 * SECONDS_PER_DAY` where `SECONDS_PER_DAY = 86400`
 * `genesis_eth1_data` be the object of type `Eth1Data` where:
     * `genesis_eth1_data.block_hash` is the Ethereum 1.0 block hash that emitted to log for the last deposit in `deposits`
     * `genesis_eth1_data.deposit_root` is the deposit root for the last deposit in `deposits`