diff --git a/tests/test_slot_name.py b/tests/test_slot_name.py
index fa330ee..18f8904 100644
--- a/tests/test_slot_name.py
+++ b/tests/test_slot_name.py
@@ -14,7 +14,7 @@ def setUp(self):
     def test_default_slot_name(self):
         # Test backward compatibility when slot name is not provided.
         config = self.default_config
-        tap = TapPostgres(config)
+        tap = TapPostgres(config=config)
         self.assertEqual(
             tap.config.get("replication_slot_name", "tappostgres"), "tappostgres"
         )
@@ -22,7 +22,7 @@ def test_default_slot_name(self):
     def test_custom_slot_name(self):
         # Test if the custom slot name is used.
         config = {**self.default_config, "replication_slot_name": "custom_slot"}
-        tap = TapPostgres(config)
+        tap = TapPostgres(config=config)
         self.assertEqual(tap.config["replication_slot_name"], "custom_slot")
 
     def test_multiple_slots(self):
@@ -30,8 +30,8 @@ def test_multiple_slots(self):
         config_1 = {**self.default_config, "replication_slot_name": "slot_1"}
         config_2 = {**self.default_config, "replication_slot_name": "slot_2"}
 
-        tap_1 = TapPostgres(config_1)
-        tap_2 = TapPostgres(config_2)
+        tap_1 = TapPostgres(config=config_1)
+        tap_2 = TapPostgres(config=config_2)
 
         self.assertNotEqual(
             tap_1.config["replication_slot_name"],
@@ -48,4 +48,4 @@ def test_invalid_slot_name(self):
         }
 
         with self.assertRaises(ValueError):
-            TapPostgres(invalid_config)
+            TapPostgres(config=invalid_config)