diff --git a/test/functional/abc_p2p_compactblocks.py b/test/functional/abc_p2p_compactblocks.py
--- a/test/functional/abc_p2p_compactblocks.py
+++ b/test/functional/abc_p2p_compactblocks.py
@@ -236,9 +236,6 @@
         default_p2p = node.add_p2p_connection(P2PDataStore())
         test_p2p = node.add_p2p_connection(TestP2PConn())
 
-        # Set the blocksize to 2MB as initial condition
-        node.setexcessiveblock(self.excessive_block_size)
-
         self.genesis_hash = int(node.getbestblockhash(), 16)
         self.block_heights[self.genesis_hash] = 0
         spendable_outputs = []
diff --git a/test/functional/abc_p2p_fullblocktest.py b/test/functional/abc_p2p_fullblocktest.py
--- a/test/functional/abc_p2p_fullblocktest.py
+++ b/test/functional/abc_p2p_fullblocktest.py
@@ -187,9 +187,6 @@
         node = self.nodes[0]
         node.add_p2p_connection(P2PDataStore())
 
-        # Set the blocksize to 2MB as initial condition
-        node.setexcessiveblock(self.excessive_block_size)
-
         self.genesis_hash = int(node.getbestblockhash(), 16)
         self.block_heights[self.genesis_hash] = 0
         spendable_outputs = []