diff --git a/test/functional/feature_fee_estimation.py b/test/functional/feature_fee_estimation.py
index 83627ff5c2d20..974d8268a2a7f 100755
--- a/test/functional/feature_fee_estimation.py
+++ b/test/functional/feature_fee_estimation.py
@@ -398,6 +398,7 @@ def clear_estimates(self):
         self.start_node(0)
         self.connect_nodes(0, 1)
         self.connect_nodes(0, 2)
+        self.sync_blocks()
         assert_equal(self.nodes[0].estimatesmartfee(1)["errors"], ["Insufficient data or no feerate found"])
 
     def broadcast_and_mine(self, broadcaster, miner, feerate, count):