diff --git a/src/dummywallet.cpp b/src/dummywallet.cpp
index 9160ec19e6..42282c32d1 100644
--- a/src/dummywallet.cpp
+++ b/src/dummywallet.cpp
@@ -53,6 +53,7 @@ void DummyWalletInit::AddWalletOptions(ArgsManager& argsman) const
         "-walletrejectlongchains",
         "-walletcrosschain",
         "-unsafesqlitesync",
+        "-swapbdbendian",
     });
 }
 
diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp
index f151fad740..cbdce88810 100644
--- a/src/wallet/init.cpp
+++ b/src/wallet/init.cpp
@@ -87,8 +87,9 @@ void WalletInit::AddWalletOptions(ArgsManager& argsman) const
     argsman.AddArg("-dblogsize=<n>", strprintf("Flush wallet database activity from memory to disk log every <n> megabytes (default: %u)", DatabaseOptions().max_log_mb), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::WALLET_DEBUG_TEST);
     argsman.AddArg("-flushwallet", strprintf("Run a thread to flush wallet periodically (default: %u)", DEFAULT_FLUSHWALLET), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::WALLET_DEBUG_TEST);
     argsman.AddArg("-privdb", strprintf("Sets the DB_PRIVATE flag in the wallet db environment (default: %u)", !DatabaseOptions().use_shared_memory), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::WALLET_DEBUG_TEST);
+    argsman.AddArg("-swapbdbendian", "Swaps the internal endianness of BDB wallet databases (default: false)", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::WALLET_DEBUG_TEST);
 #else
-    argsman.AddHiddenArgs({"-dblogsize", "-flushwallet", "-privdb"});
+    argsman.AddHiddenArgs({"-dblogsize", "-flushwallet", "-privdb", "-swapbdbendian"});
 #endif
 
 #ifdef USE_SQLITE
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 96c4397504..5a8df5790e 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -375,7 +375,12 @@ std::shared_ptr<CWallet> CreateWallet(WalletContext& context, const std::string&
     uint64_t wallet_creation_flags = options.create_flags;
     const SecureString& passphrase = options.create_passphrase;
 
+    ArgsManager& args = *Assert(context.args);
+
     if (wallet_creation_flags & WALLET_FLAG_DESCRIPTORS) options.require_format = DatabaseFormat::SQLITE;
+    else if (args.GetBoolArg("-swapbdbendian", false)) {
+        options.require_format = DatabaseFormat::BERKELEY_SWAP;
+    }
 
     // Indicate that the wallet is actually supposed to be blank and not just blank to make it encrypted
     bool create_blank = (wallet_creation_flags & WALLET_FLAG_BLANK_WALLET);
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index 89e4aa7055..0a28cc9394 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -193,6 +193,7 @@ BASE_SCRIPTS = [
     'wallet_txn_doublespend.py --mineblock',
     'tool_wallet.py --legacy-wallet',
     'tool_wallet.py --legacy-wallet --bdbro',
+    'tool_wallet.py --legacy-wallet --bdbro --swap-bdb-endian',
     'tool_wallet.py --descriptors',
     'tool_signet_miner.py --legacy-wallet',
     'tool_signet_miner.py --descriptors',
diff --git a/test/functional/tool_wallet.py b/test/functional/tool_wallet.py
index 51239831cc..dcf74f6075 100755
--- a/test/functional/tool_wallet.py
+++ b/test/functional/tool_wallet.py
@@ -24,11 +24,14 @@ class ToolWalletTest(BitcoinTestFramework):
     def add_options(self, parser):
         self.add_wallet_options(parser)
         parser.add_argument("--bdbro", action="store_true", help="Use the BerkeleyRO internal parser when dumping a Berkeley DB wallet file")
+        parser.add_argument("--swap-bdb-endian", action="store_true",help="When making Legacy BDB wallets, always make then byte swapped internally")
 
     def set_test_params(self):
         self.num_nodes = 1
         self.setup_clean_chain = True
         self.rpc_timeout = 120
+        if self.options.swap_bdb_endian:
+            self.extra_args = [["-swapbdbendian"]]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()