diff --git a/wallet/udb/testdata/v12.db.go b/wallet/udb/testdata/v12.db.go
new file mode 100644
index 000000000..bb6a46de2
--- /dev/null
+++ b/wallet/udb/testdata/v12.db.go
@@ -0,0 +1,116 @@
+// Copyright (c) 2019 The Decred developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+// This file should compiled from the commit the file was introduced, otherwise
+// it may not compile due to API changes, or may not create the database with
+// the correct old version.  This file should not be updated for API changes.
+
+package main
+
+import (
+	"compress/gzip"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/decred/dcrd/chaincfg"
+	"github.com/decred/dcrd/hdkeychain"
+	_ "github.com/decred/dcrwallet/wallet/v2/drivers/bdb"
+	"github.com/decred/dcrwallet/wallet/v2/udb"
+	"github.com/decred/dcrwallet/wallet/v2/walletdb"
+	"github.com/decred/dcrwallet/walletseed"
+)
+
+const dbname = "v12.db"
+
+var (
+	pubPass  = []byte("public")
+	privPass = []byte("private")
+)
+
+var chainParams = &chaincfg.TestNet3Params
+
+func main() {
+	err := setup()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "setup: %v\n", err)
+		os.Exit(1)
+	}
+	err = compress()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "compress: %v\n", err)
+		os.Exit(1)
+	}
+}
+
+func hexToBytes(origHex string) []byte {
+	buf, err := hex.DecodeString(origHex)
+	if err != nil {
+		panic(err)
+	}
+	return buf
+}
+
+func setup() error {
+	db, err := walletdb.Create("bdb", dbname)
+	if err != nil {
+		return err
+	}
+	defer db.Close()
+	seed, err := walletseed.GenerateRandomSeed(hdkeychain.RecommendedSeedLen)
+	if err != nil {
+		return err
+	}
+	err = udb.Initialize(db, chainParams, seed, pubPass, privPass)
+	if err != nil {
+		return err
+	}
+
+	amgr, txStore, _, err := udb.Open(db, chainParams, pubPass)
+	if err != nil {
+		return err
+	}
+
+	err = walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
+		amgrns := tx.ReadWriteBucket([]byte("waddrmgr"))
+		txmgrns := tx.ReadWriteBucket([]byte("wtxmgr"))
+
+		if err := amgr.Unlock(amgrns, privPass); err != nil {
+			return err
+		}
+
+		script := hexToBytes("51210373c717acda38b5aa4c00c33932e059cdbc" +
+			"11deceb5f00490a9101704cc444c5151ae")
+
+		_, err := amgr.ImportScript(amgrns, script)
+		if err != nil {
+			return err
+		}
+
+		return txStore.InsertTxScript(txmgrns, script)
+	})
+
+	return err
+}
+
+func compress() error {
+	db, err := os.Open(dbname)
+	if err != nil {
+		return err
+	}
+	defer os.Remove(dbname)
+	defer db.Close()
+	dbgz, err := os.Create(dbname + ".gz")
+	if err != nil {
+		return err
+	}
+	defer dbgz.Close()
+	gz := gzip.NewWriter(dbgz)
+	_, err = io.Copy(gz, db)
+	if err != nil {
+		return err
+	}
+	return gz.Close()
+}
diff --git a/wallet/udb/testdata/v12.db.gz b/wallet/udb/testdata/v12.db.gz
new file mode 100644
index 000000000..c53d1979a
Binary files /dev/null and b/wallet/udb/testdata/v12.db.gz differ