diff --git a/qa/rpc-tests/wallet_1941.py b/qa/rpc-tests/wallet_1941.py
index 2e677246..5f2fe3f7 100755
--- a/qa/rpc-tests/wallet_1941.py
+++ b/qa/rpc-tests/wallet_1941.py
@@ -102,7 +102,8 @@ class Wallet1941RegressionTest (BitcoinTestFramework):
         self.sync_all()
 
         # Import the key on node 1, only scanning the last few blocks.
-        self.nodes[1].z_importkey(key, 'yes', self.nodes[1].getblockchaininfo()['blocks'] - 100)
+        # (uses 'true' to test boolean fallback)
+        self.nodes[1].z_importkey(key, 'true', self.nodes[1].getblockchaininfo()['blocks'] - 100)
 
         # Confirm that the balance on node 1 is zero, as we have not
         # rescanned over the older transactions