diff --git a/pyproject.toml b/pyproject.toml
index e5dd8e5..b82533d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,9 +47,13 @@ line-length = 88
 target-version = "py38"
 
 [tool.ruff.lint]
-select = ["E4", "E7", "E9", "F"]
+select = ["E4", "E7", "E9", "F", "UP"]
 ignore = []
 
+
+[tool.ruff.lint.per-file-ignores]
+"**/scripts/*" = ["UP"]
+
 [tool.ruff.lint.isort]
 force-sort-within-sections = true
 known-first-party = ["aiontfy"]
diff --git a/src/pythonxbox/authentication/xal.py b/src/pythonxbox/authentication/xal.py
index d662d89..e69a0bc 100644
--- a/src/pythonxbox/authentication/xal.py
+++ b/src/pythonxbox/authentication/xal.py
@@ -134,7 +134,7 @@ async def request_device_token(self) -> XADResponse:
 
         if self.client_params.device_type.lower() == "android":
             # {decf45e4-945d-4379-b708-d4ee92c12d99}
-            device_id = "{%s}" % device_id
+            device_id = f"{{{device_id}}}"
         else:
             # iOSs
             # DECF45E4-945D-4379-B708-D4EE92C12D99
diff --git a/tests/test_message.py b/tests/test_message.py
index e62d6b7..ea9f965 100644
--- a/tests/test_message.py
+++ b/tests/test_message.py
@@ -19,9 +19,7 @@ async def test_get_conversation(respx_mock, xbl_client):
     route = respx_mock.get("https://xblmessaging.xboxlive.com").mock(
         return_value=Response(200, json=get_response_json("message_get_conversation"))
     )
-    await xbl_client.message.get_conversation(
-        "05907fa3-0000-0009-acbd-299772a90900"
-    )
+    await xbl_client.message.get_conversation("05907fa3-0000-0009-acbd-299772a90900")
 
     assert route.called
 
@@ -31,9 +29,7 @@ async def test_get_new_conversation(respx_mock, xbl_client):
     route = respx_mock.get("https://xblmessaging.xboxlive.com").mock(
         return_value=Response(200, json=get_response_json("message_new_conversation"))
     )
-    await xbl_client.message.get_conversation(
-        "05907fa3-0000-0009-acbd-299772a90900"
-    )
+    await xbl_client.message.get_conversation("05907fa3-0000-0009-acbd-299772a90900")
 
     assert route.called
 
diff --git a/tests/test_ratelimits.py b/tests/test_ratelimits.py
index b3176fb..1db3ba9 100644
--- a/tests/test_ratelimits.py
+++ b/tests/test_ratelimits.py
@@ -147,7 +147,7 @@ async def helper_reach_and_wait_for_burst(
     start_time,
     burst_limit: int,
     expected_counter: int,
-    frozen_datetime: FrozenDateTimeFactory
+    frozen_datetime: FrozenDateTimeFactory,
 ):
     # Make as many requests as possible without exceeding the BURST limit.
     for _ in range(burst_limit):
@@ -178,6 +178,7 @@ async def helper_reach_and_wait_for_burst(
 @pytest.mark.asyncio
 async def test_ratelimits_exceeded_sustain_only(respx_mock, xbl_client):
     with freeze_time("2025-10-30T00:00:00-00:00") as frozen_datetime:
+
         async def make_request():
             route = respx_mock.get("https://social.xboxlive.com").mock(
                 return_value=Response(200, json=get_response_json("people_summary_own"))
@@ -197,14 +198,22 @@ async def make_request():
 
         # Exceed the burst limit and wait for it to reset (10 requests)
         await helper_reach_and_wait_for_burst(
-            make_request, start_time, burst_limit=burst_max_request_num, expected_counter=10, frozen_datetime=frozen_datetime
+            make_request,
+            start_time,
+            burst_limit=burst_max_request_num,
+            expected_counter=10,
+            frozen_datetime=frozen_datetime,
         )
 
         # Repeat: Exceed the burst limit and wait for it to reset (10 requests)
         # Counter (the sustain one will be returned)
         #         For (CombinedRateLimit).get_counter(), the highest counter is returned. (sustain in this case)
         await helper_reach_and_wait_for_burst(
-            make_request, start_time, burst_limit=burst_max_request_num, expected_counter=20, frozen_datetime=frozen_datetime
+            make_request,
+            start_time,
+            burst_limit=burst_max_request_num,
+            expected_counter=20,
+            frozen_datetime=frozen_datetime,
         )
 
         # Now, make the rest of the requests (10 left, 20/30 done!)
@@ -212,7 +221,7 @@ async def make_request():
             await make_request()
 
         # Wait for the burst limit to 'reset'.
-        frozen_datetime.tick(timedelta(seconds=TimePeriod.BURST.value+1))
+        frozen_datetime.tick(timedelta(seconds=TimePeriod.BURST.value + 1))
         # Now, we have made 30 requests.
         # The counters should be as follows:
         # - BURST: 0* (will reset on next check)
diff --git a/tests/test_request_signer.py b/tests/test_request_signer.py
index 2f53e44..fc6f52e 100644
--- a/tests/test_request_signer.py
+++ b/tests/test_request_signer.py
@@ -84,7 +84,7 @@ def test_synthetic_verify_digest(
     signature = base64.b64decode(
         "Fe3R7GuZfvGA350cH7hWgg4HIHjaD9lGYiwxki6bNyGnB8dMEIfEmBiuNuGUfWjY5lL2h44X/VMGOkPIezVb7Q=="
     )
-    invalid_signature = b"\xFF" + bytes(signature)[1:]
+    invalid_signature = b"\xff" + bytes(signature)[1:]
     success = synthetic_request_signer.verify_digest(signature, message)
     success_via_vk = synthetic_request_signer.verify_digest(
         signature, message, ecdsa_verifying_key