diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f5f9635f..b382dddcb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,6 +79,7 @@ jobs:
       - name: Run pycodestyle
         run: |
           pycodestyle \
+            --exclude=src/electrumx/lib/zcash \
             --max-line-length=140 \
             src
 
diff --git a/src/electrumx/lib/tx.py b/src/electrumx/lib/tx.py
index d0b472f37..ed92afb24 100644
--- a/src/electrumx/lib/tx.py
+++ b/src/electrumx/lib/tx.py
@@ -586,10 +586,10 @@ def read_tx(self):
             self.cursor += 96 * nSpendsSapling    # vSpendsSapling
             nOutputsSapling = self._read_varint()
             self.cursor += 756 * nOutputsSapling  # vOutputsSapling
-            hasSapling = not(nSpendsSapling == 0 and nOutputsSapling == 0)
+            hasSapling = not (nSpendsSapling == 0 and nOutputsSapling == 0)
             if (hasSapling):
                 self.cursor += 8                  # valueBalanceSapling
-            if not(nSpendsSapling == 0):
+            if not (nSpendsSapling == 0):
                 self.cursor += 32                 # anchorSapling
             self.cursor += 192 * nSpendsSapling   # vSpendProofsSapling
             self.cursor += 64 * nSpendsSapling    # vSpendAuthSigsSapling
@@ -606,7 +606,7 @@ def read_tx(self):
                 self.cursor += 32                   # anchorOrchard
                 sizeProofsOrchard = self._read_varint()
                 self.cursor += sizeProofsOrchard    # proofsOrchard
-                self.cursor += 64 * nActionsOrchard # vSpendAuthSigsOrchard
+                self.cursor += 64 * nActionsOrchard  # vSpendAuthSigsOrchard
                 self.cursor += 64                   # bindingSigOrchard
             if is_zip229_v6:
                 nActionsIronwood = self._read_varint()
@@ -662,6 +662,7 @@ def _zcash_txid_canonical(txin, *, expected_version):
             ) from e
         return bytes(reversed(hex_str_to_bytes(tx.hash)))
 
+
 @dataclass(kw_only=True, slots=True)
 class TxPIVX(Tx):
     '''Class representing a PIVX transaction.'''
diff --git a/tests/test_blocks.py b/tests/test_blocks.py
index 561324b13..0459380d5 100644
--- a/tests/test_blocks.py
+++ b/tests/test_blocks.py
@@ -54,6 +54,11 @@ def _does_coin_require_testcase(coin: Coin) -> bool:
         coins.Sibcoin,
         coins.CanadaeCoin,
         coins.Auroracoin,
+        coins.Clam,
+        coins.Diabase,
+        coins.Pepecoin,
+        coins.Riecoin,
+        coins.Verus,
     ]:
         return False
     return True