fix CI

distributed/tests/test_worker_memory.py

@@ -542,18 +542,18 @@ async def test_override_data_nanny(c, s, n):
     config={"distributed.worker.memory.monitor-interval.spill-pause": "10ms"},
 )
 async def test_override_data_vs_memory_monitor(c, s, a):
+    a.monitor.get_process_memory = lambda: 801_000_000 if a.data else 0
     assert memory_monitor_running(a)
 
     # Push a key that would normally trip both the target and the spill thresholds
     class C:
         def __sizeof__(self):
-            return 1_000_000_000
+            return 801_000_000
 
     # Capture output of log_errors()
     with captured_logger(logging.getLogger("distributed.utils")) as logger:
         x = c.submit(C)
         await wait(x)
-        a.monitor.get_process_memory = lambda: 1_000_000_000
 
         # The pause subsystem of the memory monitor has been tripped.
         # The spill subsystem hasn't.