diff --git a/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py b/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py
index 9424e9bd3..7f20284a8 100644
--- a/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py
+++ b/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py
@@ -6,6 +6,7 @@ from typing_inspect import get_origin
 # SSZ integers
 # -----------------------------
 
+
 class uint(int):
     byte_len = 0
 
@@ -23,6 +24,7 @@ class uint8(uint):
             raise ValueError("value out of bounds for uint8")
         return super().__new__(cls, value)
 
+
 # Alias for uint8
 byte = NewType('byte', uint8)