scheduler tests: fix for flaky vfp tests

src/test/integration/scheduler/test_regression_virtual_file_path.py

@@ -5,6 +5,7 @@
 from typing import TYPE_CHECKING
 
 import pytest
+from flaky import flaky
 
 from objects.firmware import Firmware
 from test.common_helper import get_test_data_dir
@@ -28,6 +29,7 @@ def add_test_file(scheduler, path_in_test_dir):
     scheduler.add_task(firmware)
 
 
+@flaky(max_runs=3, min_passes=1)  # test may fail when the CI is very busy
 @pytest.mark.SchedulerTestConfig(items_to_unpack=4)
 def test_check_collision(
     frontend_db,
@@ -36,12 +38,12 @@ def test_check_collision(
     unpacking_finished_event,
 ):
     add_test_file(unpacking_scheduler, 'regression_one')
-    assert unpacking_finished_event.wait(timeout=20)
+    assert unpacking_finished_event.wait(timeout=25)
     unpacking_finished_counter.value = 0
     unpacking_finished_event.clear()
 
     add_test_file(unpacking_scheduler, 'regression_two')
-    assert unpacking_finished_event.wait(timeout=20)
+    assert unpacking_finished_event.wait(timeout=25)
 
     fo_from_db = frontend_db.get_object(TARGET_UID)
     assert len(fo_from_db.virtual_file_path) == 2, 'fo should have two parents'  # noqa: PLR2004
@@ -51,6 +53,7 @@ def test_check_collision(
     assert fo_from_db.virtual_file_path[SECOND_ROOT_ID] == ['/test']
 
 
+@flaky(max_runs=3, min_passes=1)  # test may fail when the CI is very busy
 @pytest.mark.SchedulerTestConfig(items_to_unpack=4)
 def test_unpacking_skip(
     frontend_db,
@@ -60,7 +63,7 @@ def test_unpacking_skip(
 ):
     add_test_file(unpacking_scheduler, 'vfp_test.zip')
 
-    assert unpacking_finished_event.wait(timeout=20)
+    assert unpacking_finished_event.wait(timeout=25)
 
     unpacked_objects = _collect_unpacked_files(post_unpack_queue)
     assert len(list(unpacked_objects)) == INCLUDED_FILE_COUNT