diff --git a/test/functional/abc-parkedchain.py b/test/functional/abc-parkedchain.py
--- a/test/functional/abc-parkedchain.py
+++ b/test/functional/abc-parkedchain.py
@@ -5,7 +5,7 @@
 """Test the parckblock and unparkblock RPC calls."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, wait_until
+from test_framework.util import assert_equal, wait_until, sync_blocks
 
 
 class ParkedChainTest(BitcoinTestFramework):
@@ -34,6 +34,9 @@
         node.generate(10)
         parked_tip = node.getbestblockhash()
 
+        # make sure nodes[1] has caught up
+        sync_blocks(self.nodes)
+
         # Let's park the chain.
         assert(parked_tip != tip)
         assert(block_to_park != tip)
@@ -58,6 +61,9 @@
         node.generate(1)
         good_tip = node.getbestblockhash()
 
+        # make sure nodes[1] has caught up
+        sync_blocks(self.nodes)
+
         node.invalidateblock(bad_tip)
         self.only_valid_tip(tip, other_tip_status="invalid")
         node.parkblock(bad_tip)
@@ -75,6 +81,9 @@
         node.generate(1)
         good_tip = node.getbestblockhash()
 
+        # make sure nodes[1] has caught up
+        sync_blocks(self.nodes)
+
         node.parkblock(bad_tip)
         self.only_valid_tip(tip, other_tip_status="parked")
         node.invalidateblock(bad_tip)
@@ -95,6 +104,9 @@
         node.generate(1)
         good_tip = node.getbestblockhash()
 
+        # make sure nodes[1] has caught up
+        sync_blocks(self.nodes)
+
         node.invalidateblock(bad_tip)
         self.only_valid_tip(tip, other_tip_status="invalid")
         node.parkblock(bad_tip)
@@ -112,6 +124,9 @@
         node.generate(1)
         good_tip = node.getbestblockhash()
 
+        # make sure nodes[1] has caught up
+        sync_blocks(self.nodes)
+
         node.parkblock(bad_tip)
         self.only_valid_tip(tip, other_tip_status="parked")
         node.invalidateblock(bad_tip)