test: Unicode-ify strings.

caucase/test.py

@@ -881,9 +881,9 @@ class CaucaseTest(unittest.TestCase):
       x509.oid.ExtendedKeyUsageOID.CLIENT_AUTH,
     ])
     requested_alt_name = expected_alt_name = x509.SubjectAlternativeName([
-      x509.RFC822Name('nobody@example.com'),
-      x509.DNSName('example.com'),
-      x509.UniformResourceIdentifier('https://example.com/a/b/c'),
+      x509.RFC822Name(u'nobody@example.com'),
+      x509.DNSName(u'example.com'),
+      x509.UniformResourceIdentifier(u'https://example.com/a/b/c'),
       x509.IPAddress(ipaddress.IPv4Address(u'127.0.0.1')),
       x509.IPAddress(ipaddress.IPv6Address(u'::1')),
       x509.IPAddress(ipaddress.IPv4Network(u'127.0.0.0/8')),
@@ -928,7 +928,7 @@ class CaucaseTest(unittest.TestCase):
       ).add_extension(requested_policies, critical=True,
       ).add_extension(requested_basic_constraints, critical=True,
       ).add_extension(
-        x509.NameConstraints([x509.DNSName('com')], None),
+        x509.NameConstraints([x509.DNSName(u'com')], None),
         critical=True,
       ),
     )