tests: restore from old "hex" seed

diff --git a/electrum/keystore.py b/electrum/keystore.py
index 65c4ec3..b7f39c1 100644
--- a/electrum/keystore.py
+++ b/electrum/keystore.py
@@ -757,6 +757,10 @@ class Old_KeyStore(MasterPublicKeyMixin, Deterministic_KeyStore):
         self.mpk = mpk
 
     def format_seed(self, seed):
+        """Returns seed in hex format.
+
+        seed: either in hex or as mnemonic words
+        """
         from . import old_mnemonic, mnemonic
         seed = mnemonic.normalize_text(seed)
         # see if seed was entered as hex
diff --git a/tests/test_wallet_vertical.py b/tests/test_wallet_vertical.py
index ffe737a..c1c73dc 100644
--- a/tests/test_wallet_vertical.py
+++ b/tests/test_wallet_vertical.py
@@ -175,20 +175,27 @@ class TestWalletKeystoreAddressIntegrityForMainnet(ElectrumTestCase):
     @mock.patch.object(wallet.Abstract_Wallet, 'save_db')
     async def test_electrum_seed_old(self, mock_save_db):
         seed_words = 'powerful random nobody notice nothing important anyway look away hidden message over'
-        self.assertEqual(calc_seed_type(seed_words), 'old')
+        seed_hex = 'acb740e454c3134901d7c8f16497cc1c'
 
-        ks = keystore.from_seed(seed_words, passphrase='', for_multisig=False)
+        for seed_to_restore_from in (seed_words, seed_hex):
+            with self.subTest(seed_to_restore_from=seed_to_restore_from):
+                self.assertEqual(calc_seed_type(seed_to_restore_from), 'old')
 
-        WalletIntegrityHelper.check_seeded_keystore_sanity(self, ks)
-        self.assertTrue(isinstance(ks, keystore.Old_KeyStore))
+                ks = keystore.from_seed(seed_to_restore_from, passphrase='', for_multisig=False)
 
-        self.assertEqual(ks.mpk, 'e9d4b7866dd1e91c862aebf62a49548c7dbf7bcc6e4b7b8c9da820c7737968df9c09d5a3e271dc814a29981f81b3faaf2737b551ef5dcc6189cf0f8252c442b3')
+                WalletIntegrityHelper.check_seeded_keystore_sanity(self, ks)
+                self.assertTrue(isinstance(ks, keystore.Old_KeyStore))
 
-        w = WalletIntegrityHelper.create_standard_wallet(ks, config=self.config)
-        self.assertEqual(w.txin_type, 'p2pkh')
+                self.assertEqual(ks.mpk, 'e9d4b7866dd1e91c862aebf62a49548c7dbf7bcc6e4b7b8c9da820c7737968df9c09d5a3e271dc814a29981f81b3faaf2737b551ef5dcc6189cf0f8252c442b3')
+                self.assertEqual(ks.seed, seed_hex)
+                self.assertEqual(ks._get_hex_seed(password=None), seed_hex)
+                self.assertEqual(ks.get_seed(password=None), seed_words)
+
+                w = WalletIntegrityHelper.create_standard_wallet(ks, config=self.config)
+                self.assertEqual(w.txin_type, 'p2pkh')
 
-        self.assertEqual(w.get_receiving_addresses()[0], '1FJEEB8ihPMbzs2SkLmr37dHyRFzakqUmo')
-        self.assertEqual(w.get_change_addresses()[0], '1KRW8pH6HFHZh889VDq6fEKvmrsmApwNfe')
+                self.assertEqual(w.get_receiving_addresses()[0], '1FJEEB8ihPMbzs2SkLmr37dHyRFzakqUmo')
+                self.assertEqual(w.get_change_addresses()[0], '1KRW8pH6HFHZh889VDq6fEKvmrsmApwNfe')
 
     @mock.patch.object(wallet.Abstract_Wallet, 'save_db')
     async def test_electrum_seed_2fa_legacy_pre27_25words(self, mock_save_db):
diff --git a/tests/test_wizard.py b/tests/test_wizard.py
index a758377..6bbab88 100644
--- a/tests/test_wizard.py
+++ b/tests/test_wizard.py
@@ -7,7 +7,7 @@ from electrum.network import NetworkParameters, ProxySettings
 from electrum.plugin import Plugins, DeviceInfo, Device
 from electrum.wizard import ServerConnectWizard, NewWalletWizard, WizardViewState, KeystoreWizard
 from electrum.daemon import Daemon
-from electrum.wallet import Abstract_Wallet
+from electrum.wallet import Abstract_Wallet, Deterministic_Wallet
 from electrum import util
 from electrum import slip39
 from electrum.bip32 import KeyOriginInfo
@@ -584,7 +584,29 @@ class WalletWizardTestCase(WizardTestCase):
             'seed': 'powerful random nobody notice nothing important anyway look away hidden message over',
             'seed_type': 'old', 'seed_extend': False, 'seed_variant': 'electrum'})
         v = w.resolve_next(v.view, d)
-        self._set_password_and_check_address(v=v, w=w, recv_addr="1FJEEB8ihPMbzs2SkLmr37dHyRFzakqUmo")
+        wallet = self._set_password_and_check_address(v=v, w=w, recv_addr="1FJEEB8ihPMbzs2SkLmr37dHyRFzakqUmo")
+
+        self.assertIsInstance(wallet, Deterministic_Wallet)
+        self.assertEqual(wallet.get_seed(password=None), 'powerful random nobody notice nothing important anyway look away hidden message over')
+
+    async def test_create_standard_wallet_haveseed_electrum_oldseed_in_hex_format(self):
+        w = self._wizard_for(wallet_type='standard')
+        v = w._current
+        d = v.wizard_data
+        self.assertEqual('keystore_type', v.view)
+
+        d.update({'keystore_type': 'haveseed'})
+        v = w.resolve_next(v.view, d)
+        self.assertEqual('have_seed', v.view)
+
+        d.update({
+            'seed': 'acb740e454c3134901d7c8f16497cc1c',
+            'seed_type': 'old', 'seed_extend': False, 'seed_variant': 'electrum'})
+        v = w.resolve_next(v.view, d)
+        wallet = self._set_password_and_check_address(v=v, w=w, recv_addr="1FJEEB8ihPMbzs2SkLmr37dHyRFzakqUmo")
+
+        self.assertIsInstance(wallet, Deterministic_Wallet)
+        self.assertEqual(wallet.get_seed(password=None), 'powerful random nobody notice nothing important anyway look away hidden message over')
 
     async def test_create_standard_wallet_haveseed_electrum_oldseed_passphrase(self):
         w = self._wizard_for(wallet_type='standard')