diff --git a/tests/unit/obuf-limits.tcl b/tests/unit/obuf-limits.tcl
index fa661aa4c..54aa8ebc8 100644
--- a/tests/unit/obuf-limits.tcl
+++ b/tests/unit/obuf-limits.tcl
@@ -15,7 +15,7 @@ start_server {tags {"obuf-limits"}} {
             if {![regexp {omem=([0-9]+)} $c - omem]} break
             if {$omem > 200000} break
         }
-        assert {$omem >= 99984 && $omem < 200000}
+        assert {$omem >= 99970 && $omem < 200000}
         $rd1 close
     }