diff --git a/bitcoinlib/db.py b/bitcoinlib/db.py
index c52eaeb8..8994a6ed 100644
--- a/bitcoinlib/db.py
+++ b/bitcoinlib/db.py
@@ -119,7 +119,7 @@ def _import_config_data(ses):
         session.close()
 
 
-def add_column(engine, table_name, column):
+def add_column(engine, table_name, column):  # pragma: no cover
     """
     Used to add new column to database with migration and update scripts
 
@@ -501,7 +501,7 @@ class DbTransactionOutput(Base):
     __table_args__ = (UniqueConstraint('transaction_id', 'output_n', name='constraint_transaction_output_unique'),)
 
 
-def db_update_version_id(db, version):
+def db_update_version_id(db, version):  # pragma: no cover
     _logger.info("Updated BitcoinLib database to version %s" % version)
     db.session.query(DbConfig).filter(DbConfig.variable == 'version').update(
         {DbConfig.value: version})
@@ -509,7 +509,7 @@ def db_update_version_id(db, version):
     return version
 
 
-def db_update(db, version_db, code_version=BITCOINLIB_VERSION):
+def db_update(db, version_db, code_version=BITCOINLIB_VERSION):  # pragma: no cover
     # Database changes from version 0.5+
     #
     if version_db <= '0.6.3' and code_version > '0.6.3':
diff --git a/tests/test_blocks.py b/tests/test_blocks.py
index e4d0ecb3..4b40b74d 100644
--- a/tests/test_blocks.py
+++ b/tests/test_blocks.py
@@ -73,6 +73,13 @@ def test_blocks_parse_genesis(self):
         self.assertEqual(b.tx_count, 1)
         self.assertEqual(str(b),
                          '<Block(000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f, 0, transactions: 1)>')
+        t = b.parse_transaction()
+        self.assertEqual(t.outputs[0].address, '1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa')
+        self.assertEqual(b.total_out, 0)
+        b.update_totals()
+        self.assertEqual(b.total_in, 0)
+        self.assertEqual(b.total_out, 5000000000)
+
 
     def test_blocks_create_block(self):
         block_hash = '00000000000023b05c9ae15577257daf17029604eba0a58824e93306e44d0c62'
diff --git a/tests/test_keys.py b/tests/test_keys.py
index 1fc1fff5..969d5012 100644
--- a/tests/test_keys.py
+++ b/tests/test_keys.py
@@ -628,6 +628,12 @@ def test_hdkey_network_change(self):
         k.network_change('litecoin')
         self.assertEqual(k.address(), 'LPsPTgctprGZ6FEc7QFAugr6qg8XV3X4tg')
 
+    def test_hdkey_formats(self):
+        pkhex = '036e770e764c8c03acd620030c2844dd09d7c756ecedeb0521fe075301caf0e6ad'
+        k = HDKey(pkhex)
+        self.assertEqual(k.as_bytes(), bytes.fromhex(pkhex))
+        self.assertEqual(k.as_hex(), pkhex)
+
 
 class TestBip38(unittest.TestCase):