test: protect against inappropriate failure on slow machine

test/test_sched/test_tiered_tenancy.py

@@ -186,9 +186,12 @@ def test_large_result(confpatch, schedpatch):
 
     assert logs.field_equals(completed=1, total=1, active=0)
 
-    assert event.duration.total_seconds() < 1
+    # timing is machine-dependent -- and should really be *very* quick -- but we can't ensure this
+    # across test platforms. rather, the below duration is a compromise, and "fast" relative to
+    # previous stdout-reading implementations.
+    assert event.duration.total_seconds() < 5
 
-    assert session.seconds < 1
+    assert session.seconds < 5
 
     assert len(bytes(event.stdout)) == HUNDRED_MB