diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e571db8f04..647bc705b8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -39,6 +39,7 @@ jobs:
   tests:
     name: "Test on ${{ matrix.python-version }} (${{ matrix.session }}) / ${{ matrix.os }}"
     runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.session != 'tests' }}
     env:
       NOXSESSION: ${{ matrix.session }}
     strategy:
diff --git a/singer_sdk/authenticators.py b/singer_sdk/authenticators.py
index 61382daba3..104cc3cb42 100644
--- a/singer_sdk/authenticators.py
+++ b/singer_sdk/authenticators.py
@@ -5,7 +5,7 @@
 import base64
 import math
 import typing as t
-from datetime import datetime, timedelta
+from datetime import timedelta
 from types import MappingProxyType
 from urllib.parse import parse_qs, urlencode, urlsplit, urlunsplit
 
@@ -19,6 +19,8 @@
 if t.TYPE_CHECKING:
     import logging
 
+    from pendulum import DateTime
+
     from singer_sdk.streams.rest import RESTStream
 
 
@@ -378,7 +380,7 @@ def __init__(
         # Initialize internal tracking attributes
         self.access_token: str | None = None
         self.refresh_token: str | None = None
-        self.last_refreshed: datetime | None = None
+        self.last_refreshed: DateTime | None = None
         self.expires_in: int | None = None
 
     @property