diff --git a/sentry_sdk/tracing.py b/sentry_sdk/tracing.py
index 3c76ef7a00..dbe863bc61 100644
--- a/sentry_sdk/tracing.py
+++ b/sentry_sdk/tracing.py
@@ -1,7 +1,7 @@
 import uuid
 import random
 import time
-import warnings 
+import warnings
 from datetime import datetime, timedelta, timezone
 
 from opentelemetry import trace as otel_trace, context
diff --git a/tests/test_basics.py b/tests/test_basics.py
index d287a9f2f5..3cef565971 100644
--- a/tests/test_basics.py
+++ b/tests/test_basics.py
@@ -1,13 +1,12 @@
-import datetime
 import importlib
 import logging
 import os
 import sys
 import time
 from collections import Counter
+from datetime import datetime, timedelta, timezone
 
 import pytest
-from sentry_sdk.utils import datetime_from_isoformat
 from tests.conftest import patch_start_tracing_child
 
 import sentry_sdk
@@ -329,12 +328,12 @@ def test_breadcrumbs(sentry_init, capture_events):
 def test_breadcrumb_ordering(sentry_init, capture_events):
     sentry_init()
     events = capture_events()
-    now = datetime.datetime.now(datetime.timezone.utc).replace(microsecond=0)
+    now = datetime.now(timezone.utc).replace(microsecond=0)
 
     timestamps = [
-        now - datetime.timedelta(days=10),
-        now - datetime.timedelta(days=8),
-        now - datetime.timedelta(days=12),
+        now - timedelta(days=10),
+        now - timedelta(days=8),
+        now - timedelta(days=12),
     ]
 
     for timestamp in timestamps:
@@ -350,7 +349,8 @@ def test_breadcrumb_ordering(sentry_init, capture_events):
 
     assert len(event["breadcrumbs"]["values"]) == len(timestamps)
     timestamps_from_event = [
-        datetime_from_isoformat(x["timestamp"]) for x in event["breadcrumbs"]["values"]
+        datetime.fromisoformat(x["timestamp"])
+        for x in event["breadcrumbs"]["values"]
     ]
     assert timestamps_from_event == sorted(timestamps)
 
@@ -358,24 +358,24 @@ def test_breadcrumb_ordering(sentry_init, capture_events):
 def test_breadcrumb_ordering_different_types(sentry_init, capture_events):
     sentry_init()
     events = capture_events()
-    now = datetime.datetime.now(datetime.timezone.utc)
+    now = datetime.now(timezone.utc)
 
     timestamps = [
-        now - datetime.timedelta(days=10),
-        now - datetime.timedelta(days=8),
-        now.replace(microsecond=0) - datetime.timedelta(days=12),
-        now - datetime.timedelta(days=9),
-        now - datetime.timedelta(days=13),
-        now.replace(microsecond=0) - datetime.timedelta(days=11),
+        now - timedelta(days=10),
+        now - timedelta(days=8),
+        now.replace(microsecond=0) - timedelta(days=12),
+        now - timedelta(days=9),
+        now - timedelta(days=13),
+        now.replace(microsecond=0) - timedelta(days=11),
     ]
 
     breadcrumb_timestamps = [
         timestamps[0],
         timestamps[1].isoformat(),
-        datetime.datetime.strftime(timestamps[2], "%Y-%m-%dT%H:%M:%S") + "Z",
-        datetime.datetime.strftime(timestamps[3], "%Y-%m-%dT%H:%M:%S.%f") + "+00:00",
-        datetime.datetime.strftime(timestamps[4], "%Y-%m-%dT%H:%M:%S.%f") + "+0000",
-        datetime.datetime.strftime(timestamps[5], "%Y-%m-%dT%H:%M:%S.%f") + "-0000",
+        datetime.strftime(timestamps[2], "%Y-%m-%dT%H:%M:%S") + "Z",
+        datetime.strftime(timestamps[3], "%Y-%m-%dT%H:%M:%S.%f") + "+00:00",
+        datetime.strftime(timestamps[4], "%Y-%m-%dT%H:%M:%S.%f") + "+0000",
+        datetime.strftime(timestamps[5], "%Y-%m-%dT%H:%M:%S.%f") + "-0000",
     ]
 
     for i, timestamp in enumerate(timestamps):
@@ -391,7 +391,8 @@ def test_breadcrumb_ordering_different_types(sentry_init, capture_events):
 
     assert len(event["breadcrumbs"]["values"]) == len(timestamps)
     timestamps_from_event = [
-        datetime_from_isoformat(x["timestamp"]) for x in event["breadcrumbs"]["values"]
+        datetime.fromisoformat(x["timestamp"])
+        for x in event["breadcrumbs"]["values"]
     ]
     assert timestamps_from_event == sorted(timestamps)
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index c46cac7f9f..4df343a357 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -12,7 +12,6 @@
 from sentry_sdk.utils import (
     Components,
     Dsn,
-    datetime_from_isoformat,
     env_to_bool,
     format_timestamp,
     get_current_thread_meta,
@@ -62,55 +61,6 @@ def _normalize_distribution_name(name):
     return re.sub(r"[-_.]+", "-", name).lower()
 
 
-@pytest.mark.parametrize(
-    ("input_str", "expected_output"),
-    (
-        (
-            "2021-01-01T00:00:00.000000Z",
-            datetime(2021, 1, 1, tzinfo=timezone.utc),
-        ),  # UTC time
-        (
-            "2021-01-01T00:00:00.000000",
-            datetime(2021, 1, 1, tzinfo=datetime.now().astimezone().tzinfo),
-        ),  # No TZ -- assume UTC
-        (
-            "2021-01-01T00:00:00Z",
-            datetime(2021, 1, 1, tzinfo=timezone.utc),
-        ),  # UTC - No milliseconds
-        (
-            "2021-01-01T00:00:00.000000+00:00",
-            datetime(2021, 1, 1, tzinfo=timezone.utc),
-        ),
-        (
-            "2021-01-01T00:00:00.000000-00:00",
-            datetime(2021, 1, 1, tzinfo=timezone.utc),
-        ),
-        (
-            "2021-01-01T00:00:00.000000+0000",
-            datetime(2021, 1, 1, tzinfo=timezone.utc),
-        ),
-        (
-            "2021-01-01T00:00:00.000000-0000",
-            datetime(2021, 1, 1, tzinfo=timezone.utc),
-        ),
-        (
-            "2020-12-31T00:00:00.000000+02:00",
-            datetime(2020, 12, 31, tzinfo=timezone(timedelta(hours=2))),
-        ),  # UTC+2 time
-        (
-            "2020-12-31T00:00:00.000000-0200",
-            datetime(2020, 12, 31, tzinfo=timezone(timedelta(hours=-2))),
-        ),  # UTC-2 time
-        (
-            "2020-12-31T00:00:00-0200",
-            datetime(2020, 12, 31, tzinfo=timezone(timedelta(hours=-2))),
-        ),  # UTC-2 time - no milliseconds
-    ),
-)
-def test_datetime_from_isoformat(input_str, expected_output):
-    assert datetime_from_isoformat(input_str) == expected_output, input_str
-
-
 @pytest.mark.parametrize(
     "env_var_value,strict,expected",
     [