diff --git a/tests/test_x509.py b/tests/test_x509.py
index 7719833..fc0ccde 100644
--- a/tests/test_x509.py
+++ b/tests/test_x509.py
@@ -795,17 +795,17 @@
         ).serial_number(
             777
         ).issuer_name(x509.Name([
-            x509.NameAttribute(x509.OID_COUNTRY_NAME, 'US'),
-            x509.NameAttribute(x509.OID_STATE_OR_PROVINCE_NAME, 'Texas'),
-            x509.NameAttribute(x509.OID_LOCALITY_NAME, 'Austin'),
-            x509.NameAttribute(x509.OID_ORGANIZATION_NAME, 'PyCA'),
-            x509.NameAttribute(x509.OID_COMMON_NAME, 'cryptography.io'),
+            x509.NameAttribute(x509.OID_COUNTRY_NAME, u'US'),
+            x509.NameAttribute(x509.OID_STATE_OR_PROVINCE_NAME, u'Texas'),
+            x509.NameAttribute(x509.OID_LOCALITY_NAME, u'Austin'),
+            x509.NameAttribute(x509.OID_ORGANIZATION_NAME, u'PyCA'),
+            x509.NameAttribute(x509.OID_COMMON_NAME, u'cryptography.io'),
         ])).subject_name(x509.Name([
-            x509.NameAttribute(x509.OID_COUNTRY_NAME, 'US'),
-            x509.NameAttribute(x509.OID_STATE_OR_PROVINCE_NAME, 'Texas'),
-            x509.NameAttribute(x509.OID_LOCALITY_NAME, 'Austin'),
-            x509.NameAttribute(x509.OID_ORGANIZATION_NAME, 'PyCA'),
-            x509.NameAttribute(x509.OID_COMMON_NAME, 'cryptography.io'),
+            x509.NameAttribute(x509.OID_COUNTRY_NAME, u'US'),
+            x509.NameAttribute(x509.OID_STATE_OR_PROVINCE_NAME, u'Texas'),
+            x509.NameAttribute(x509.OID_LOCALITY_NAME, u'Austin'),
+            x509.NameAttribute(x509.OID_ORGANIZATION_NAME, u'PyCA'),
+            x509.NameAttribute(x509.OID_COMMON_NAME, u'cryptography.io'),
         ])).public_key(
             subject_private_key.public_key()
         ).add_extension(