diff --git a/test/functional/test_framework/mempool_util.py b/test/functional/test_framework/mempool_util.py
index 0e9c821e2ea..2991a88b54d 100644
--- a/test/functional/test_framework/mempool_util.py
+++ b/test/functional/test_framework/mempool_util.py
@@ -41,8 +41,8 @@ def fill_mempool(test_framework, node, *, tx_sync_fun=None):
     """Fill mempool until eviction.
 
     Allows for simpler testing of scenarios with floating mempoolminfee > minrelay
-    Requires -datacarriersize=100000 and -maxmempool=5 and assumes -minrelaytxfee
-    is 1 sat/vbyte.
+    Requires -maxmempool=5 and assumes -minrelaytxfee is 1 sat/vbyte.
+
     To avoid unintentional tx dependencies, the mempool filling txs are created with a
     tagged ephemeral miniwallet instance.
     """