Use this

Author: DifferentialOrange

test/suites/test_dml.py

@@ -20,6 +20,7 @@ def setUpClass(self):
         self.srv.script = 'test/suites/box.lua'
         self.srv.start()
         self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'])
+        self.con_encoding_utf8 = tarantool.Connection(self.srv.host, self.srv.args['primary'], encoding='utf-8')
         self.con_encoding_none = tarantool.Connection(self.srv.host, self.srv.args['primary'], encoding=None)
         self.adm = self.srv.admin
         self.space_created = self.adm("box.schema.create_space('space_1')")
@@ -106,6 +107,7 @@ def test_00_00_authenticate(self):
         box.schema.user.grant('test', 'execute,read,write', 'universe')
         """))
         self.assertEqual(self.con.authenticate('test', 'test')._data, None)
+        self.assertEqual(self.con_encoding_utf8.authenticate('test', 'test')._data, None)
         self.assertEqual(self.con_encoding_none.authenticate('test', 'test')._data, None)
 
     def test_00_01_space_created(self):
@@ -351,26 +353,32 @@ def test_12_update_fields(self):
             [[2, 'help', 7]]
         )
 
-    def test_13_00_string_insert_default_behavior(self):
-        self.assertNotRaises(self.con.insert, 'space_str', [ 'test_13_string_insert_default_behavior' ])
+    def test_13_00_string_insert_encoding_utf8_behavior(self):
+        self.assertNotRaises(
+            self.con_encoding_utf8.insert,
+            'space_str',
+            [ 'test_13_string_insert_default_behavior' ])
 
-    def test_13_01_string_select_default_behavior(self):
+    def test_13_01_string_select_encoding_utf8_behavior(self):
         self.adm(r"box.space['space_str']:insert{'test_14_string_select_default_behavior'}")
 
-        resp = self.con.select('space_str', ['test_14_string_select_default_behavior'])
+        resp = self.con_encoding_utf8.select('space_str', ['test_14_string_select_default_behavior'])
         self.assertIsInstance(resp[0][0], tarantool.utils.string_types)
 
     @skip_or_run_varbinary_test
-    def test_13_02_varbinary_insert_default_behavior(self):
-        self.assertNotRaises(self.con.insert, 'space_varbin', [ b'test_15_varbinary_insert_default_behavior' ])
+    def test_13_02_varbinary_insert_encoding_utf8_behavior(self):
+        self.assertNotRaises(
+            self.con_encoding_utf8.insert,
+            'space_varbin',
+            [ b'test_15_varbinary_insert_default_behavior' ])
 
     @skip_or_run_varbinary_test
-    def test_13_03_varbinary_select_default_behavior(self):
+    def test_13_03_varbinary_select_encoding_utf8_behavior(self):
         self.adm(r"""
              bintuple_insert(box.space['space_varbin'], {0xDE, 0xAD, 0xBE, 0xAF, 0x16})
         """)
 
-        resp = self.con.select('space_varbin', [ bytes(bytearray.fromhex('DEADBEAF16')) ])
+        resp = self.con_encoding_utf8.select('space_varbin', [ bytes(bytearray.fromhex('DEADBEAF16')) ])
         self.assertIsInstance(resp[0][0], tarantool.utils.binary_types)
 
     def test_14_00_string_insert_encoding_none_behavior(self):