diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index d3f09719eb6..1f9d5901127 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -704,7 +704,8 @@ def dumb_sync_blocks(*, src, dst, height=None):
     height = height or src.getblockcount()
     for i in range(dst.getblockcount() + 1, height + 1):
         block_hash = src.getblockhash(i)
-        block = src.getblock(blockhash=block_hash, verbosity=0)
+        # Use boolean verbosity for v0.14.x compatibility.
+        block = src.getblock(blockhash=block_hash, verbose=False)
         dst.submitblock(block)
     assert_equal(dst.getblockcount(), height)