diff --git a/test_libs/pyspec/eth2spec/test/block_processing/test_process_deposit.py b/test_libs/pyspec/eth2spec/test/block_processing/test_process_deposit.py
index 0430dd12f..b12ec6bd9 100644
--- a/test_libs/pyspec/eth2spec/test/block_processing/test_process_deposit.py
+++ b/test_libs/pyspec/eth2spec/test/block_processing/test_process_deposit.py
@@ -138,7 +138,7 @@ def test_wrong_deposit_for_deposit_count(state):
         pubkey_1,
         privkey_1,
         spec.MAX_EFFECTIVE_BALANCE,
-        withdrawal_credentials=b'\x00'*32,
+        withdrawal_credentials=b'\x00' * 32,
         signed=True,
     )
     deposit_count_1 = len(deposit_data_leaves)
@@ -153,7 +153,7 @@ def test_wrong_deposit_for_deposit_count(state):
         pubkey_2,
         privkey_2,
         spec.MAX_EFFECTIVE_BALANCE,
-        withdrawal_credentials=b'\x00'*32,
+        withdrawal_credentials=b'\x00' * 32,
         signed=True,
     )
 
diff --git a/test_libs/pyspec/eth2spec/test/helpers/bitfields.py b/test_libs/pyspec/eth2spec/test/helpers/bitfields.py
index 7c25d073a..50e5b6cba 100644
--- a/test_libs/pyspec/eth2spec/test/helpers/bitfields.py
+++ b/test_libs/pyspec/eth2spec/test/helpers/bitfields.py
@@ -5,7 +5,7 @@ def set_bitfield_bit(bitfield, i):
     byte_index = i // 8
     bit_index = i % 8
     return (
-            bitfield[:byte_index] +
-            bytes([bitfield[byte_index] | (1 << bit_index)]) +
-            bitfield[byte_index + 1:]
+        bitfield[:byte_index] +
+        bytes([bitfield[byte_index] | (1 << bit_index)]) +
+        bitfield[byte_index + 1:]
     )
diff --git a/test_libs/pyspec/eth2spec/test/helpers/transfers.py b/test_libs/pyspec/eth2spec/test/helpers/transfers.py
index 9913ef88a..91f8ea60e 100644
--- a/test_libs/pyspec/eth2spec/test/helpers/transfers.py
+++ b/test_libs/pyspec/eth2spec/test/helpers/transfers.py
@@ -36,7 +36,7 @@ def get_valid_transfer(state, slot=None, sender_index=None, amount=None, fee=Non
 
     # ensure withdrawal_credentials reproducible
     state.validator_registry[transfer.sender].withdrawal_credentials = (
-            spec.BLS_WITHDRAWAL_PREFIX_BYTE + spec.hash(transfer.pubkey)[1:]
+        spec.BLS_WITHDRAWAL_PREFIX_BYTE + spec.hash(transfer.pubkey)[1:]
     )
 
     return transfer
diff --git a/test_libs/pyspec/eth2spec/utils/hash_function.py b/test_libs/pyspec/eth2spec/utils/hash_function.py
index acd13edc4..f965827d0 100644
--- a/test_libs/pyspec/eth2spec/utils/hash_function.py
+++ b/test_libs/pyspec/eth2spec/utils/hash_function.py
@@ -1,4 +1,5 @@
 from hashlib import sha256
 
 
-def hash(x): return sha256(x).digest()
+def hash(x):
+    return sha256(x).digest()
diff --git a/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py b/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py
index fac8d8051..9c1fcdc61 100644
--- a/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py
+++ b/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py
@@ -57,7 +57,7 @@ def serialize(obj, typ=None):
     if is_basic_type(typ):
         return serialize_basic(obj, typ)
     elif is_list_kind(typ) or is_vector_kind(typ):
-        return encode_series(obj, [read_elem_type(typ)]*len(obj))
+        return encode_series(obj, [read_elem_type(typ)] * len(obj))
     elif is_container_type(typ):
         return encode_series(obj.get_field_values(), typ.get_field_types())
     else: