diff --git a/tests/test_resolver.py b/tests/test_resolver.py
index 36a36455aa3..1d3446cbab5 100644
--- a/tests/test_resolver.py
+++ b/tests/test_resolver.py
@@ -160,3 +160,16 @@ def test_default_resolver() -> None:
     # else:
     #     assert DefaultResolver is ThreadedResolver
     assert DefaultResolver is ThreadedResolver
+
+
+async def test_threaded_resolver_5156() -> None:
+    loop = Mock()
+    loop.getaddrinfo = fake_addrinfo(["127.0.0.1"])
+    loop.getaddrinfo.return_value = [
+        (2, 1, 6, "", ("151.101.188.223", 443)),
+        (10, 1, 6, "", (10, b"\x01\xbb\x00\x00\x00\x00*\x04NB\x00-\x00\x00")),
+    ]
+    resolver = ThreadedResolver()
+    resolver._loop = loop
+
+    await resolver.resolve("foo")