test: fix test feature_coinstatsindex.py for descriptor wallets

test/functional/feature_coinstatsindex.py

@@ -40,7 +40,9 @@ class CoinStatsIndexTest(BitcoinTestFramework):
         self.num_nodes = 2
         self.supports_cli = False
         self.extra_args = [
-            [],
+            # Explicitly set the output type in order to have consistent tx vsize / fees
+            # for both legacy and descriptor wallets (disables the change address type detection algorithm)
+            ["-addresstype=bech32", "-changetype=bech32"],
             ["-coinstatsindex"]
         ]