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diff --git a/Collapse file
‎asyncpg/connect_utils.py‎
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+1-1Lines changed: 1 addition & 1 deletion b/Collapse file
‎asyncpg/connect_utils.py‎
Copy file name to clipboardExpand all lines: asyncpg/connect_utils.py
+1-1Lines changed: 1 addition & 1 deletion
diff --git a/Collapse file
‎tests/test_connect.py‎
Copy file name to clipboardExpand all lines: tests/test_connect.py
+13Lines changed: 13 additions & 0 deletions b/Collapse file
‎tests/test_connect.py‎
Copy file name to clipboardExpand all lines: tests/test_connect.py
+13Lines changed: 13 additions & 0 deletions
@@ -403,7 +403,7 @@ def _parse_connect_dsn_and_args(*, dsn, host, port, user,
             host = ['/run/postgresql', '/var/run/postgresql',
                     '/tmp', '/private/tmp', 'localhost']
 
-    if not isinstance(host, list):
+    if not isinstance(host, (list, tuple)):
         host = [host]
 
     if auth_hosts is None:
 
@@ -671,6 +671,19 @@ class TestConnectParams(tb.TestCase):
                 'target_session_attrs': 'any',
             })
         },
+        {
+            'name': 'params_multi_host_dsn_env_mix_tuple',
+            'env': {
+                'PGUSER': 'foo',
+            },
+            'dsn': 'postgresql:///db',
+            'host': ('host1', 'host2'),
+            'result': ([('host1', 5432), ('host2', 5432)], {
+                'database': 'db',
+                'user': 'foo',
+                'target_session_attrs': 'any',
+            })
+        },
 
         {
             'name': 'params_combine_dsn_settings_override_and_ssl',