diff --git a/src/ert/ensemble_evaluator/config.py b/src/ert/ensemble_evaluator/config.py
index 79c127cccdb..e2c4c63a285 100644
--- a/src/ert/ensemble_evaluator/config.py
+++ b/src/ert/ensemble_evaluator/config.py
@@ -8,7 +8,7 @@
 import typing
 import warnings
 from base64 import b64encode
-from datetime import datetime, timedelta
+from datetime import UTC, datetime, timedelta
 from typing import Optional
 
 from cryptography import x509
@@ -71,8 +71,8 @@ def _generate_certificate(
         .issuer_name(issuer)
         .public_key(key.public_key())
         .serial_number(x509.random_serial_number())
-        .not_valid_before(datetime.utcnow())
-        .not_valid_after(datetime.utcnow() + timedelta(days=365))  # 1 year
+        .not_valid_before(datetime.now(UTC))
+        .not_valid_after(datetime.now(UTC) + timedelta(days=365))  # 1 year
         .add_extension(
             x509.SubjectAlternativeName(
                 [
diff --git a/tests/ert/unit_tests/ensemble_evaluator/ensemble_evaluator_utils.py b/tests/ert/unit_tests/ensemble_evaluator/ensemble_evaluator_utils.py
index 6d15180ce41..a6c38dc6fa4 100644
--- a/tests/ert/unit_tests/ensemble_evaluator/ensemble_evaluator_utils.py
+++ b/tests/ert/unit_tests/ensemble_evaluator/ensemble_evaluator_utils.py
@@ -23,7 +23,7 @@ def _mock_ws(host, port, messages, delay_startup=0):
     loop = new_event_loop()
     done = loop.create_future()
 
-    async def _handler(websocket, path):
+    async def _handler(websocket):
         while True:
             msg = await websocket.recv()
             messages.append(msg)
diff --git a/tests/ert/unit_tests/gui/tools/plot/test_plot_api.py b/tests/ert/unit_tests/gui/tools/plot/test_plot_api.py
index 49ebfddd3a4..1a1bdc0c436 100644
--- a/tests/ert/unit_tests/gui/tools/plot/test_plot_api.py
+++ b/tests/ert/unit_tests/gui/tools/plot/test_plot_api.py
@@ -186,7 +186,7 @@ def test_plot_api_request_errors(api):
 def api_and_storage(monkeypatch, tmp_path):
     with open_storage(tmp_path / "storage", mode="w") as storage:
         monkeypatch.setenv("ERT_STORAGE_NO_TOKEN", "yup")
-        monkeypatch.setenv("ERT_STORAGE_ENS_PATH", storage.path)
+        monkeypatch.setenv("ERT_STORAGE_ENS_PATH", str(storage.path))
         api = PlotApi()
         yield api, storage
     if enkf._storage is not None: