diff --git a/electrum/gui/kivy/uix/dialogs/installwizard.py b/electrum/gui/kivy/uix/dialogs/installwizard.py
index 72fd896ad..cf22199c8 100644
--- a/electrum/gui/kivy/uix/dialogs/installwizard.py
+++ b/electrum/gui/kivy/uix/dialogs/installwizard.py
@@ -989,7 +989,8 @@ class RestoreSeedDialog(WizardDialog):
             tis.focus = False
 
     def get_params(self, b):
-        return (self.get_text(), self.is_bip39, self.is_ext)
+        seed_type = 'bip39' if self.is_bip39 else 'electrum'
+        return (self.get_text(), seed_type, self.is_ext)
 
 
 class ConfirmSeedDialog(RestoreSeedDialog):
diff --git a/electrum/gui/qt/seed_dialog.py b/electrum/gui/qt/seed_dialog.py
index 131fb5841..5987773ae 100644
--- a/electrum/gui/qt/seed_dialog.py
+++ b/electrum/gui/qt/seed_dialog.py
@@ -302,7 +302,12 @@ class SeedLayout(QVBoxLayout):
         self.prev_share_btn.show()
         self.next_share_btn.show()
         self.prev_share_btn.setEnabled(self.slip39_mnemonic_index != 0)
-        self.next_share_btn.setEnabled(self.slip39_mnemonic_index < len(self.slip39_mnemonics) - 1 or (bool(self.seed_e.text().strip()) and not finished))
+        self.next_share_btn.setEnabled(
+            # already pressed "prev" and undoing that:
+            self.slip39_mnemonic_index < len(self.slip39_mnemonics) - 1
+            # finished entering latest share and starting new one:
+            or (bool(self.seed_e.text().strip()) and not self.slip39_current_mnemonic_invalid and not finished)
+        )
 
     def on_prev_share(self):
         if not self.slip39_mnemonics[self.slip39_mnemonic_index]:
diff --git a/electrum/slip39.py b/electrum/slip39.py
index 933fa3ae8..6ab1d776c 100644
--- a/electrum/slip39.py
+++ b/electrum/slip39.py
@@ -28,8 +28,8 @@ import hmac
 from collections import defaultdict
 from hashlib import pbkdf2_hmac
 from typing import Dict, Iterable, List, Optional, Set, Tuple
-from electrum.i18n import _
 
+from .i18n import _
 from .mnemonic import Wordlist
 
 Indices = Tuple[int, ...]
diff --git a/electrum/tests/test_mnemonic.py b/electrum/tests/test_mnemonic.py
index 65ef89264..606f9dcdb 100644
--- a/electrum/tests/test_mnemonic.py
+++ b/electrum/tests/test_mnemonic.py
@@ -1,5 +1,6 @@
 from typing import NamedTuple, Optional
 import json
+import os
 
 from electrum import keystore
 from electrum import mnemonic
@@ -197,7 +198,8 @@ class Test_slip39(ElectrumTestCase):
     """ Test SLIP39 test vectors. """
 
     def test_slip39_vectors(self):
-        with open("slip39-vectors.json", "r") as f:
+        test_vector_file = os.path.join(os.path.dirname(__file__), "slip39-vectors.json")
+        with open(test_vector_file, "r") as f:
             vectors = json.load(f)
         for description, mnemonics, expected_secret in vectors:
             if expected_secret: