diff --git a/src/httpware/middleware/resilience/retry.py b/src/httpware/middleware/resilience/retry.py
index f0cd19e..4e267f4 100644
--- a/src/httpware/middleware/resilience/retry.py
+++ b/src/httpware/middleware/resilience/retry.py
@@ -14,7 +14,7 @@
 """
 
 import asyncio
-import datetime
+import datetime as dt
 import email.utils
 import logging
 import time
@@ -77,8 +77,8 @@ def _parse_retry_after(value: str) -> float | None:
     except (TypeError, ValueError, OverflowError):
         return None
     if parsed.tzinfo is None:
-        parsed = parsed.replace(tzinfo=datetime.UTC)
-    now = datetime.datetime.now(datetime.UTC)
+        parsed = parsed.replace(tzinfo=dt.UTC)
+    now = dt.datetime.now(dt.UTC)
     delta = (parsed - now).total_seconds()
     return max(0.0, delta)
 
diff --git a/tests/test_retry.py b/tests/test_retry.py
index 47ad02a..af492d3 100644
--- a/tests/test_retry.py
+++ b/tests/test_retry.py
@@ -4,7 +4,7 @@
 callable so the suite runs instantly without freezegun.
 """
 
-import datetime
+import datetime as dt
 import email.utils
 import logging
 import typing
@@ -271,8 +271,8 @@ async def test_retry_after_seconds_overrides_backoff() -> None:
 
 async def test_retry_after_http_date_overrides_backoff() -> None:
     sleeper = _SleepRecorder()
-    before = datetime.datetime.now(datetime.UTC)
-    future = before.replace(microsecond=0) + datetime.timedelta(seconds=3)
+    before = dt.datetime.now(dt.UTC)
+    future = before.replace(microsecond=0) + dt.timedelta(seconds=3)
     http_date = email.utils.format_datetime(future, usegmt=True)
     handler = _ResponseSequenceWithHeaders(
         [
@@ -282,7 +282,7 @@ async def test_retry_after_http_date_overrides_backoff() -> None:
     )
     client = _client(handler, retry=AsyncRetry(_sleep=sleeper, base_delay=0.01, max_delay=10.0))
     response = await client.get("https://example.test/x")
-    after = datetime.datetime.now(datetime.UTC)
+    after = dt.datetime.now(dt.UTC)
     assert response.status_code == HTTPStatus.OK
     assert len(sleeper.calls) == 1
     assert (future - after).total_seconds() <= sleeper.calls[0] <= (future - before).total_seconds()
diff --git a/tests/test_retry_policy.py b/tests/test_retry_policy.py
index 42946c3..2b15129 100644
--- a/tests/test_retry_policy.py
+++ b/tests/test_retry_policy.py
@@ -6,7 +6,7 @@
 path is random, so it is asserted by bounds; the Retry-After path by exact value.
 """
 
-import datetime
+import datetime as dt
 
 import httpx2
 import pytest
@@ -168,7 +168,7 @@ def test_respect_retry_after_false_ignores_header() -> None:
 
 @pytest.mark.parametrize("zone", ["-0000", "", "XYZ"])
 def test_retry_after_date_without_a_usable_zone_is_read_as_gmt(zone: str) -> None:
-    future = datetime.datetime.now(datetime.UTC) + datetime.timedelta(seconds=_DATE_AHEAD_SECONDS)
+    future = dt.datetime.now(dt.UTC) + dt.timedelta(seconds=_DATE_AHEAD_SECONDS)
     header = f"{future:%a, %d %b %Y %H:%M:%S} {zone}".rstrip()
     request = _request("PUT")
     delay = _policy().decide(attempt=0, request=request, exc=_status_exc(503, request, retry_after=header))
diff --git a/tests/test_retry_sync.py b/tests/test_retry_sync.py
index ffe796b..e423650 100644
--- a/tests/test_retry_sync.py
+++ b/tests/test_retry_sync.py
@@ -4,7 +4,7 @@
 injects a recording ``_sleep`` callable so the suite runs instantly.
 """
 
-import datetime
+import datetime as dt
 import email.utils
 import logging
 import typing
@@ -303,7 +303,7 @@ def test_retry_after_seconds_honored() -> None:
 
 def test_retry_after_http_date_overrides_backoff() -> None:
     sleeper = _SleepRecorder()
-    future = datetime.datetime.now(datetime.UTC) + datetime.timedelta(seconds=3)
+    future = dt.datetime.now(dt.UTC) + dt.timedelta(seconds=3)
     http_date = email.utils.format_datetime(future, usegmt=True)
     handler = _ResponseSequenceWithHeaders(
         [