======================================================================
ERROR: test_dbapi_threadsafety (tests.psycopg2.tests.Tests)
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Traceback (most recent call last):
  File "/home/aaronabbott/src/tests/psycopg2/tests.py", line 54, in test_dbapi_threadsafety
    with_dbapi_threadsafety=True,
  File "/home/aaronabbott/src/tests/psycopg2/tests.py", line 36, in assertSQL
    self.assertEqual(cursor.execute(None, 'SELECT 1;'), 'worked')
  File "/home/aaronabbott/src/.tox/py36-psycopg2/lib/python3.6/site-packages/google/cloud/sqlcommenter/psycopg2/extension.py", line 70, in execute
    sql += generate_sql_comment(**data)
  File "/home/aaronabbott/src/.tox/py36-psycopg2/lib/python3.6/site-packages/google/cloud/sqlcommenter/__init__.py", line 42, in generate_sql_comment
    ) + '*/'
  File "/home/aaronabbott/src/.tox/py36-psycopg2/lib/python3.6/site-packages/google/cloud/sqlcommenter/__init__.py", line 41, in <genexpr>
    if value is not None
  File "/home/aaronabbott/src/.tox/py36-psycopg2/lib/python3.6/site-packages/google/cloud/sqlcommenter/__init__.py", line 46, in url_quote
    quoted = url_quote_fn(s)
  File "/usr/local/lib/python3.6/urllib/parse.py", line 825, in quote
    return quote_from_bytes(string, safe)
  File "/usr/local/lib/python3.6/urllib/parse.py", line 850, in quote_from_bytes
    raise TypeError("quote_from_bytes() expected bytes")
TypeError: quote_from_bytes() expected bytes

======================================================================
ERROR: test_libpq_version (tests.psycopg2.tests.Tests)
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Traceback (most recent call last):
  File "/home/aaronabbott/src/tests/psycopg2/tests.py", line 71, in test_libpq_version
    "SELECT 1; /*libpq_version={}*/".format(url_quote(psycopg2.__libpq_version__)),
  File "/home/aaronabbott/src/.tox/py36-psycopg2/lib/python3.6/site-packages/google/cloud/sqlcommenter/__init__.py", line 46, in url_quote
    quoted = url_quote_fn(s)
  File "/usr/local/lib/python3.6/urllib/parse.py", line 825, in quote
    return quote_from_bytes(string, safe)
  File "/usr/local/lib/python3.6/urllib/parse.py", line 850, in quote_from_bytes
    raise TypeError("quote_from_bytes() expected bytes")
TypeError: quote_from_bytes() expected bytes