Index: dolfin/python/test/unit/common/test_timer.py
===================================================================
--- dolfin.orig/python/test/unit/common/test_timer.py	2024-01-04 02:03:57.161702192 +0100
+++ dolfin/python/test/unit/common/test_timer.py	2024-01-04 02:04:43.060998594 +0100
@@ -29,6 +29,10 @@
 # Seed random generator for determinism
 random.seed(0)
 
+# resolution of the timer is not precise,
+# need to allow some tolerance
+timing_resolution = 0.015
+
 def get_random_task_name():
     """Get pseudo-random string"""
     return hex(random.randint(0, 1e32))
@@ -40,20 +44,20 @@
 
     # Execute task in the context manager
     with Timer(task) as t:
-        sleep(0.05)
-        assert t.elapsed()[0] >= 0.05
+        sleep(0.1)
+        assert t.elapsed()[0] >= 0.1 - timing_resolution
 
     # Check timing
     t = timing(task, TimingClear.clear)
     assert t[0] == 1
-    assert t[1] >= 0.05
+    assert t[1] >= 0.05 - timing_resolution
 
 
 def test_context_manager_anonymous():
     """Test that anonymous Timer works as context manager"""
     with Timer() as t:
-        sleep(0.05)
-        assert t.elapsed()[0] >= 0.05
+        sleep(0.1)
+        assert t.elapsed()[0] >= 0.1 - timing_resolution
 
 
 # Test case for decorated free function
@@ -116,7 +120,7 @@
     # Check that correct timing was recorded
     t = timing(task, TimingClear.clear)
     assert t[0] == 2
-    assert t[1] >= 0.1
+    assert t[1] >= 0.1 - timing_resolution
 
 
 def test_decorator_timer_scope():
@@ -158,4 +162,4 @@
     sleep(0.05)
 
     # Check that sleeping above did not influence timer
-    assert timing(task, TimingClear.clear)[1] < 0.1
+    assert timing(task, TimingClear.clear)[1] < 0.1 + timing_resolution