diff --git a/tests/merge.py b/tests/merge.py
index 541c5173..1f553819 100644
--- a/tests/merge.py
+++ b/tests/merge.py
@@ -1865,6 +1865,10 @@ class MergeTest(ProbackupTest, unittest.TestCase):
             backup_dir, 'node', node, backup_type='page')
         pgdata = self.pgdata_content(node.data_dir)
 
+        result = node.safe_psql(
+            'postgres',
+            'SELECT * from pgbench_accounts')
+
         node_restored = self.make_simple_node(
             base_dir=os.path.join(module_name, fname, 'node_restored'))
         node_restored.cleanup()
@@ -1883,6 +1887,18 @@ class MergeTest(ProbackupTest, unittest.TestCase):
             backup_dir, 'node',
             node_restored, backup_id=backup_id)
         pgdata_restored = self.pgdata_content(node_restored.data_dir)
+
+        self.set_auto_conf(
+            node_restored,
+            {'port': node_restored.port})
+        node_restored.slow_start()
+
+        result_new = node_restored.safe_psql(
+            'postgres',
+            'SELECT * from pgbench_accounts')
+
+        self.assertTrue(result, result_new)
+
         self.compare_pgdata(pgdata, pgdata_restored)
 
         # Clean after yourself
diff --git a/tests/restore.py b/tests/restore.py
index 115da13b..918800bc 100644
--- a/tests/restore.py
+++ b/tests/restore.py
@@ -2748,6 +2748,7 @@ class RestoreTest(ProbackupTest, unittest.TestCase):
 
     def test_partial_restore_backward_compatibility_1(self):
         """
+        old binary should be version < 2.2.0
         """
         fname = self.id().split('.')[3]
         backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
diff --git a/tests/set_backup.py b/tests/set_backup.py
index 5e98e918..d93d0d71 100644
--- a/tests/set_backup.py
+++ b/tests/set_backup.py
@@ -311,7 +311,9 @@ class SetBackupTest(ProbackupTest, unittest.TestCase):
 
         # sanity
         for timeline in timelines:
-            self.assertEqual(timeline['min-segno'], '0000000000000004')
+            self.assertEqual(
+                timeline['min-segno'],
+                '000000010000000000000004')
             self.assertEqual(timeline['status'], 'OK')
 
         # Clean after yourself
@@ -373,7 +375,9 @@ class SetBackupTest(ProbackupTest, unittest.TestCase):
 
         # sanity
         for timeline in timelines:
-            self.assertEqual(timeline['min-segno'], '0000000000000002')
+            self.assertEqual(
+                timeline['min-segno'],
+                '000000010000000000000002')
             self.assertEqual(timeline['status'], 'OK')
 
         self.validate_pb(backup_dir)