diff --git a/pyblish_rpc/schema.py b/pyblish_rpc/schema.py
index fa1d410..9edb9cb 100644
--- a/pyblish_rpc/schema.py
+++ b/pyblish_rpc/schema.py
@@ -15,6 +15,8 @@
 
 import jsonschema
 
+from .vendor import six
+
 cache = {}
 module_dir = os.path.dirname(__file__)
 schema_dir = os.path.join(module_dir, "schema")
@@ -33,7 +35,7 @@ def load_all():
 
 
 def validate(data, schema):
-    if isinstance(schema, basestring):
+    if isinstance(schema, six.string_types):
         schema = cache[schema + ".json"]
 
     resolver = jsonschema.RefResolver(
diff --git a/tests/test_production.py b/tests/test_production.py
index db3a30e..4468c1e 100644
--- a/tests/test_production.py
+++ b/tests/test_production.py
@@ -32,6 +32,6 @@ def setup():
 def teardown():
     """Shutdown module-level server"""
     self.client.kill()
-    print "Killed"
+    print("Killed")
     self.process.wait()
     assert not process.poll()