diff --git a/test/functional/abc-sigops-mempool-mining.py b/test/functional/abc-sigops-mempool-mining.py
--- a/test/functional/abc-sigops-mempool-mining.py
+++ b/test/functional/abc-sigops-mempool-mining.py
@@ -205,14 +205,21 @@
             try:
                 node.sendrawtransaction(ToHex(ctx))
             except JSONRPCException as e:
-                if 'mempool full' in e.error['message'] or 'mempool min fee not met' in e.error['message']:
-                    self.log.info(
-                        "Mempool filled after {} transactions".format(i,))
+                if 'mempool full' in e.error['message']:
+                    # The transaction has been added to the mempool, the mempool
+                    # trimmed then the tx removed.
+                    removed_tx_feerate = Decimal('0.00000495')
+                    break
+                if 'mempool min fee not met' in e.error['message']:
+                    # The transaction never reached the mempool. The last
+                    # removed tx is txid_highsigops.
+                    removed_tx_feerate = Decimal('0.00000400')
                     break
                 raise
         else:
             raise RuntimeError("didn't fill mempool")
 
+        self.log.info("Mempool filled after {} transactions".format(i,))
         self.log.info(
             'The flooding only caused eviction of lower low sat/vbyte packages')
 
@@ -227,11 +234,13 @@
         settxids = set([txid1, txid_parent, txid_child])
         assert_equal(settxids.difference(mempool_txids), set())
 
-        self.log.info('Mempool fee floor has jumped to 1.495 sat/vbyte')
-        # The removed txes have feerate 495 sat/kvbyte and the fee floor jumps by
-        # 1000 sat/kbyte (MEMPOOL_FULL_FEE_INCREMENT) on top of that:
+        # The removed txes have feerate 400 or 495 sat/kvbyte and the fee floor
+        # jumps by 1000 sat/kbyte (MEMPOOL_FULL_FEE_INCREMENT) on top of that:
+        expected_min_feerate = removed_tx_feerate + Decimal('0.00001000')
+        self.log.info(
+            'Mempool fee floor has jumped to {} sat/vbyte'.format(expected_min_feerate))
         assert_equal(node.getmempoolinfo()[
-                     'mempoolminfee'], Decimal('0.00001495'))
+                     'mempoolminfee'], expected_min_feerate)
 
         self.log.info(
             'Broadcasting a regular tx still works, because wallet knows what fee to use.')