tests: try to make tests pass on Python 3.13 on unix platforms (#10665)

tests/unit/test_logger.py

@@ -1,7 +1,5 @@
 import logging
-import time
 import traceback
-from datetime import datetime
 
 import colorama
 import pytest
@@ -22,11 +20,9 @@ colors = {
 
 @pytest.fixture
 def dt(mocker):
-    mocker.patch(
-        "time.time",
-        return_value=time.mktime(datetime(2020, 2, 2).timetuple()),  # noqa: DTZ001
-    )
-    return "2020-02-02 00:00:00,000"
+    dt_str = "2020-02-02 00:00:00,000"
+    mocker.patch.object(formatter, "formatTime", return_value=dt_str)
+    return dt_str
 
 
 class TestColorFormatter:

tests/unit/ui/test_pager.py

@@ -1,3 +1,5 @@
+from pydoc import plainpager
+
 import pytest
 
 from dvc.env import DVC_PAGER
@@ -70,8 +72,8 @@ def test_dvc_sets_some_options_on_less_if_less_env_defined(mocker, monkeypatch,
     assert find_pager() == "less --RAW-CONTROL-CHARS --chop-long-lines"
 
 
-def test_make_pager_when_no_pager_found(mocker, monkeypatch):
-    assert make_pager(None).__name__ == "plainpager"
+def test_make_pager_when_no_pager_found():
+    assert make_pager(None) is plainpager
 
 
 def test_pager(mocker, monkeypatch):