diff --git a/tests/backup.py b/tests/backup.py
index 1317829d..1f76b296 100644
--- a/tests/backup.py
+++ b/tests/backup.py
@@ -1050,6 +1050,9 @@ class BackupTest(ProbackupTest, unittest.TestCase):
     # @unittest.skip("skip")
     def test_pg_11_adjusted_wal_segment_size(self):
         """"""
+        if self.pg_config_version < self.version_to_num('11.0'):
+            return unittest.skip('You need PostgreSQL >= 11 for this test')
+
         fname = self.id().split('.')[3]
         backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
         node = self.make_simple_node(
@@ -1067,9 +1070,6 @@ class BackupTest(ProbackupTest, unittest.TestCase):
         self.set_archiving(backup_dir, 'node', node)
         node.slow_start()
 
-        if self.get_version(node) < self.version_to_num('11.0'):
-            return unittest.skip('You need PostgreSQL >= 11 for this test')
-
         node.pgbench_init(scale=5)
 
         # FULL STREAM backup
@@ -1119,8 +1119,6 @@ class BackupTest(ProbackupTest, unittest.TestCase):
                 '--delete-wal',
                 '--retention-redundancy=1'])
 
-        print(output)
-
         # validate
         self.validate_pb(backup_dir)
 
diff --git a/tests/checkdb.py b/tests/checkdb.py
index 6ea671a0..0a8054f5 100644
--- a/tests/checkdb.py
+++ b/tests/checkdb.py
@@ -466,11 +466,6 @@ class CheckdbTest(ProbackupTest, unittest.TestCase):
                 "postgres",
                 "create extension amcheck_next")
 
-        # truncate log_file
-        #with open(node.pg_log_file, 'w') as f:
-        #    f.truncate()
-        #    f.close()
-
         # FULL backup
         gdb = self.checkdb_node(
             backup_dir, 'node', gdb=True,
@@ -482,7 +477,7 @@ class CheckdbTest(ProbackupTest, unittest.TestCase):
         gdb.set_breakpoint('amcheck_one_index')
         gdb.run_until_break()
 
-        gdb.continue_execution_until_break(4)
+        gdb.continue_execution_until_break(10)
         gdb.remove_all_breakpoints()
 
         gdb._execute('signal SIGINT')
diff --git a/tests/delta.py b/tests/delta.py
index 2c030fc0..8083c57c 100644
--- a/tests/delta.py
+++ b/tests/delta.py
@@ -928,8 +928,6 @@ class DeltaTest(ProbackupTest, unittest.TestCase):
             set_replication=True,
             initdb_params=['--data-checksums'],
             pg_options={
-                'max_wal_senders': '2',
-                'checkpoint_timeout': '30s',
                 'autovacuum': 'off'
             }
         )
diff --git a/tests/helpers/ptrack_helpers.py b/tests/helpers/ptrack_helpers.py
index 1ed69f49..86f6e27c 100644
--- a/tests/helpers/ptrack_helpers.py
+++ b/tests/helpers/ptrack_helpers.py
@@ -274,6 +274,11 @@ class ProbackupTest(object):
         if 'PGPROBACKUP_SSH_REMOTE' in self.test_env:
             self.remote = True
 
+    @property
+    def pg_config_version(self):
+        return self.version_to_num(
+            testgres.get_pg_config()['VERSION'].split(" ")[1])
+
 #            if 'PGPROBACKUP_SSH_HOST' in self.test_env:
 #                self.remote_host = self.test_env['PGPROBACKUP_SSH_HOST']
 #            else
diff --git a/tests/restore.py b/tests/restore.py
index 28a6c61a..00f5b5a2 100644
--- a/tests/restore.py
+++ b/tests/restore.py
@@ -2159,6 +2159,9 @@ class RestoreTest(ProbackupTest, unittest.TestCase):
         """
         test group access for PG >= 11
         """
+        if self.pg_config_version < self.version_to_num('11.0'):
+            return unittest.skip('You need PostgreSQL >= 11 for this test')
+
         fname = self.id().split('.')[3]
         node = self.make_simple_node(
             base_dir=os.path.join(module_name, fname, 'node'),
@@ -2172,9 +2175,6 @@ class RestoreTest(ProbackupTest, unittest.TestCase):
         self.add_instance(backup_dir, 'node', node)
         node.slow_start()
 
-        if self.get_version(node) < self.version_to_num('11.0'):
-            return unittest.skip('You need PostgreSQL >= 11 for this test')
-
         # take FULL backup
         self.backup_node(backup_dir, 'node', node, options=['--stream'])
 
@@ -2200,6 +2200,9 @@ class RestoreTest(ProbackupTest, unittest.TestCase):
         """
         test group access for PG >= 11
         """
+        if self.pg_config_version < self.version_to_num('10.0'):
+            return unittest.skip('You need PostgreSQL >= 10 for this test')
+
         fname = self.id().split('.')[3]
         wal_dir = os.path.join(
             os.path.join(self.tmp_path, module_name, fname), 'wal_dir')
@@ -2216,9 +2219,6 @@ class RestoreTest(ProbackupTest, unittest.TestCase):
         self.add_instance(backup_dir, 'node', node)
         node.slow_start()
 
-        if self.get_version(node) < self.version_to_num('10.0'):
-            return unittest.skip('You need PostgreSQL >= 10 for this test')
-
         # take FULL backup
         self.backup_node(
             backup_dir, 'node', node, options=['--stream'])
@@ -2335,7 +2335,11 @@ class RestoreTest(ProbackupTest, unittest.TestCase):
                     self.output, self.cmd))
         except ProbackupException as e:
             self.assertIn(
-                'Insert correct error message', e.message,
+                'is not found', e.message,
+                '\n Unexpected Error Message: {0}\n CMD: {1}'.format(
+                    repr(e.message), self.cmd))
+            self.assertIn(
+                'ERROR: Data files restoring failed', e.message,
                 '\n Unexpected Error Message: {0}\n CMD: {1}'.format(
                     repr(e.message), self.cmd))