diff --git a/tests/unit/async_/io/test_direct.py b/tests/unit/async_/io/test_direct.py
index 711ec711..21bdd8d6 100644
--- a/tests/unit/async_/io/test_direct.py
+++ b/tests/unit/async_/io/test_direct.py
@@ -83,6 +83,9 @@ def defunct(self):
     def timedout(self):
         return False
 
+    def assert_re_auth_support(self):
+        pass
+
 
 class AsyncFakeBoltPool(AsyncIOPool):
     is_direct_pool = False
diff --git a/tests/unit/mixed/io/test_direct.py b/tests/unit/mixed/io/test_direct.py
index 63fba1e7..04e6b98d 100644
--- a/tests/unit/mixed/io/test_direct.py
+++ b/tests/unit/mixed/io/test_direct.py
@@ -17,6 +17,8 @@
 
 
 import asyncio
+import threading
+import time
 from asyncio import Event as AsyncEvent
 from threading import (
     Event,
@@ -26,10 +28,20 @@
 
 import pytest
 
+from neo4j._async.io._pool import AcquireAuth as AsyncAcquireAuth
 from neo4j._deadline import Deadline
+from neo4j._sync.io._pool import AcquireAuth
+from neo4j.auth_management import (
+    AsyncAuthManagers,
+    AuthManagers,
+)
 
 from ...async_.io.test_direct import AsyncFakeBoltPool
+from ...async_.test_auth_manager import (
+    static_auth_manager as static_async_auth_manager,
+)
 from ...sync.io.test_direct import FakeBoltPool
+from ...sync.test_auth_manager import static_auth_manager
 from ._common import (
     AsyncMultiEvent,
     MultiEvent,
@@ -111,6 +123,49 @@ def acquire_release_conn(pool_, address_, acquired_counter_,
             # The pool size is still 5, but all are free
             self.assert_pool_size(address, 0, 5, pool)
 
+    def test_full_pool_re_auth(self, mocker):
+        address = ("127.0.0.1", 7687)
+        acquire_auth1 = AcquireAuth(auth=static_auth_manager(
+            ("user1", "pass1"))
+        )
+        auth2 = ("user2", "pass2")
+        acquire_auth2 = AcquireAuth(auth=static_auth_manager(auth2))
+        acquire1_event = threading.Event()
+        cx1 = None
+
+        def acquire1(pool_):
+            nonlocal cx1
+            cx = pool_._acquire(address, acquire_auth1, Deadline(0), None)
+            acquire1_event.set()
+            cx1 = cx
+            while True:
+                with pool_.cond:
+                    # _waiters is an internal attribute of threading.Condition
+                    # this might break in the future, but we couldn't come up
+                    # with a better way of waiting for the other thread to block.
+                    waiters = len(pool_.cond._waiters)
+                if waiters:
+                    break
+                time.sleep(0.001)
+            cx.re_auth = mocker.Mock(spec=cx.re_auth)
+            pool_.release(cx)
+
+        def acquire2(pool_):
+            acquire1_event.wait(timeout=10)
+            cx = pool_._acquire(address, acquire_auth2, Deadline(10), None)
+            assert cx is cx1
+            cx.re_auth.assert_called_once()
+            assert auth2 in cx.re_auth.call_args.args
+            pool_.release(cx)
+
+        with FakeBoltPool((), max_connection_pool_size=1) as pool:
+            t1 = threading.Thread(target=acquire1, args=(pool,), daemon=True)
+            t2 = threading.Thread(target=acquire2, args=(pool,), daemon=True)
+            t1.start()
+            t2.start()
+            t1.join()
+            t2.join()
+
     @pytest.mark.parametrize("pre_populated", (0, 3, 5))
     @pytest.mark.asyncio
     async def test_multi_coroutine(self, pre_populated):
@@ -172,3 +227,35 @@ async def waiter(pool_, acquired_counter_, release_event_):
                 waiter(pool, acquired_counter, release_event),
                 *coroutines
             )
+
+    @pytest.mark.asyncio
+    async def test_full_pool_re_auth_async(self, mocker):
+        address = ("127.0.0.1", 7687)
+        acquire_auth1 = AsyncAcquireAuth(auth=static_async_auth_manager(
+            ("user1", "pass1"))
+        )
+        auth2 = ("user2", "pass2")
+        acquire_auth2 = AsyncAcquireAuth(auth=static_async_auth_manager(auth2))
+        cx1 = None
+
+        async def acquire1(pool_):
+            nonlocal cx1
+            cx = await pool_._acquire(address, acquire_auth1, Deadline(0), None)
+            cx1 = cx
+            while len(pool_.cond._waiters) == 0:
+                await asyncio.sleep(0)
+            cx.re_auth = mocker.Mock(spec=cx.re_auth)
+            await pool_.release(cx)
+
+        async def acquire2(pool_):
+            while cx1 is None:
+                await asyncio.sleep(0)
+            cx = await pool_._acquire(address, acquire_auth2,
+                                      Deadline(float("inf")), None)
+            assert cx is cx1
+            cx.re_auth.assert_called_once()
+            assert auth2 in cx.re_auth.call_args.args
+            await pool_.release(cx)
+
+        async with AsyncFakeBoltPool((), max_connection_pool_size=1) as pool:
+            await asyncio.gather(acquire1(pool), acquire2(pool))
diff --git a/tests/unit/sync/io/test_direct.py b/tests/unit/sync/io/test_direct.py
index 4a4ef6a7..e75aab94 100644
--- a/tests/unit/sync/io/test_direct.py
+++ b/tests/unit/sync/io/test_direct.py
@@ -83,6 +83,9 @@ def defunct(self):
     def timedout(self):
         return False
 
+    def assert_re_auth_support(self):
+        pass
+
 
 class FakeBoltPool(IOPool):
     is_direct_pool = False