diff --git a/test/functional/feature_pruning.py b/test/functional/feature_pruning.py
--- a/test/functional/feature_pruning.py
+++ b/test/functional/feature_pruning.py
@@ -226,6 +226,7 @@
             "Mine 220 more large blocks so we have requisite history")
 
         mine_large_blocks(self.nodes[0], 220)
+        sync_blocks(self.nodes[0:3], timeout=120)
 
         usage = calc_usage(self.prunedir)
         self.log.info("Usage should be below target: {}".format(usage))