diff --git a/tests/backup_test.py b/tests/backup_test.py
index b8bc07e2..da31f25f 100644
--- a/tests/backup_test.py
+++ b/tests/backup_test.py
@@ -2,8 +2,6 @@ import unittest
 import os
 from time import sleep
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException
-from testgres import stop_all, clean_all
-import shutil
 
 
 class BackupTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/delete_test.py b/tests/delete_test.py
index c6120fd3..593bd83c 100644
--- a/tests/delete_test.py
+++ b/tests/delete_test.py
@@ -1,9 +1,7 @@
 import unittest
 import os
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException
-from testgres import stop_all, clean_all
 import subprocess
-import shutil
 
 
 class DeleteTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/false_positive.py b/tests/false_positive.py
index 6d35c21a..00477524 100644
--- a/tests/false_positive.py
+++ b/tests/false_positive.py
@@ -2,9 +2,7 @@ import unittest
 import os
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException
 from datetime import datetime, timedelta
-from testgres import stop_all, clean_all
 import subprocess
-import shutil
 
 
 class FalsePositive(ProbackupTest, unittest.TestCase):
diff --git a/tests/init_test.py b/tests/init_test.py
index 25cf969e..52699f4f 100644
--- a/tests/init_test.py
+++ b/tests/init_test.py
@@ -1,10 +1,6 @@
-import unittest
-from sys import exit
 import os
-from os import path
+import unittest
 from .helpers.ptrack_helpers import dir_files, ProbackupTest, ProbackupException
-from testgres import stop_all, clean_all
-import shutil
 
 
 class InitTest(ProbackupTest, unittest.TestCase):
@@ -67,7 +63,7 @@ class InitTest(ProbackupTest, unittest.TestCase):
         backup_dir = os.path.join(self.tmp_path, self.module_name, fname, 'backup')
         node = self.make_simple_node(base_dir="{0}/{1}/node".format(self.module_name, fname))
         try:
-            self.run_pb(["init", "-B", path.relpath("%s/backup" % node.base_dir, self.dir_path)])
+            self.run_pb(["init", "-B", os.path.relpath("%s/backup" % node.base_dir, self.dir_path)])
             self.assertEqual(1, 0, 'Expecting Error due to initialization with non-absolute path in --backup-path. Output: {0} \n CMD: {1}'.format(
                 repr(self.output), self.cmd))
         except ProbackupException as e:
diff --git a/tests/option_test.py b/tests/option_test.py
index 359f0fa8..a05a0c44 100644
--- a/tests/option_test.py
+++ b/tests/option_test.py
@@ -1,8 +1,6 @@
 import unittest
 import os
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException
-from testgres import stop_all, clean_all
-import shutil
 
 
 class OptionTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/pgpro560.py b/tests/pgpro560.py
index d2482cff..1654636e 100644
--- a/tests/pgpro560.py
+++ b/tests/pgpro560.py
@@ -2,9 +2,7 @@ import os
 import unittest
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException, idx_ptrack
 from datetime import datetime, timedelta
-from testgres import stop_all, clean_all
 import subprocess
-import shutil
 
 
 class CheckSystemID(ProbackupTest, unittest.TestCase):
diff --git a/tests/pgpro589.py b/tests/pgpro589.py
index 062cae21..c15cd4aa 100644
--- a/tests/pgpro589.py
+++ b/tests/pgpro589.py
@@ -2,9 +2,7 @@ import os
 import unittest
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException, idx_ptrack
 from datetime import datetime, timedelta
-from testgres import stop_all, clean_all
 import subprocess
-import shutil
 
 
 class ArchiveCheck(ProbackupTest, unittest.TestCase):
diff --git a/tests/ptrack_clean.py b/tests/ptrack_clean.py
index d0b7c21c..54d7f8a4 100644
--- a/tests/ptrack_clean.py
+++ b/tests/ptrack_clean.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/ptrack_cluster.py b/tests/ptrack_cluster.py
index 9e913dcb..13ea7678 100644
--- a/tests/ptrack_cluster.py
+++ b/tests/ptrack_cluster.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/ptrack_move_to_tablespace.py b/tests/ptrack_move_to_tablespace.py
index 2b2b605e..41a310eb 100644
--- a/tests/ptrack_move_to_tablespace.py
+++ b/tests/ptrack_move_to_tablespace.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import clean_all, stop_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
@@ -10,11 +8,6 @@ class SimpleTest(ProbackupTest, unittest.TestCase):
         super(SimpleTest, self).__init__(*args, **kwargs)
         self.module_name = 'ptrack_move_to_tablespace'
 
-    # @classmethod
-    # def tearDownClass(cls):
-    #     clean_all()
-    #     shutil.rmtree(os.path.join(self.tmp_path, self.module_name), ignore_errors=True)
-
     # @unittest.skip("skip")
     # @unittest.expectedFailure
     def test_ptrack_recovery(self):
diff --git a/tests/ptrack_recovery.py b/tests/ptrack_recovery.py
index cdb0c4ef..abc7a751 100644
--- a/tests/ptrack_recovery.py
+++ b/tests/ptrack_recovery.py
@@ -1,9 +1,7 @@
 import os
 import unittest
 from sys import exit
-from testgres import clean_all, stop_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/ptrack_vacuum.py b/tests/ptrack_vacuum.py
index 4284a100..fa8d145f 100644
--- a/tests/ptrack_vacuum.py
+++ b/tests/ptrack_vacuum.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
@@ -10,11 +8,6 @@ class SimpleTest(ProbackupTest, unittest.TestCase):
         super(SimpleTest, self).__init__(*args, **kwargs)
         self.module_name = 'ptrack_vacuum'
 
-    # @classmethod
-    # def tearDownClass(cls):
-    #     clean_all()
-    #     shutil.rmtree(os.path.join(self.tmp_path, self.module_name), ignore_errors=True)
-
     # @unittest.skip("skip")
     # @unittest.expectedFailure
     def test_ptrack_vacuum(self):
diff --git a/tests/ptrack_vacuum_bits_frozen.py b/tests/ptrack_vacuum_bits_frozen.py
index cc785ce3..e41bb265 100644
--- a/tests/ptrack_vacuum_bits_frozen.py
+++ b/tests/ptrack_vacuum_bits_frozen.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
@@ -10,11 +8,6 @@ class SimpleTest(ProbackupTest, unittest.TestCase):
         super(SimpleTest, self).__init__(*args, **kwargs)
         self.module_name = 'ptrack_vacuum_bits_frozen'
 
-    # @classmethod
-    # def tearDownClass(cls):
-    #    clean_all()
-    #    shutil.rmtree(os.path.join(self.tmp_path, self.module_name), ignore_errors=True)
-
     # @unittest.skip("skip")
     # @unittest.expectedFailure
     def test_ptrack_vacuum_bits_frozen(self):
diff --git a/tests/ptrack_vacuum_bits_visibility.py b/tests/ptrack_vacuum_bits_visibility.py
index fc206eb9..a52325d7 100644
--- a/tests/ptrack_vacuum_bits_visibility.py
+++ b/tests/ptrack_vacuum_bits_visibility.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
@@ -10,11 +8,6 @@ class SimpleTest(ProbackupTest, unittest.TestCase):
         super(SimpleTest, self).__init__(*args, **kwargs)
         self.module_name = 'ptrack_vacuum_bits_visibility'
 
-    # @classmethod
-    # def tearDownClass(cls):
-    #    clean_all()
-    #    shutil.rmtree(os.path.join(self.tmp_path, self.module_name), ignore_errors=True)
-
     # @unittest.skip("skip")
     # @unittest.expectedFailure
     def test_ptrack_vacuum_bits_visibility(self):
diff --git a/tests/ptrack_vacuum_full.py b/tests/ptrack_vacuum_full.py
index 15bc9486..592821a0 100644
--- a/tests/ptrack_vacuum_full.py
+++ b/tests/ptrack_vacuum_full.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/ptrack_vacuum_truncate.py b/tests/ptrack_vacuum_truncate.py
index 34f555b2..3bd54b69 100644
--- a/tests/ptrack_vacuum_truncate.py
+++ b/tests/ptrack_vacuum_truncate.py
@@ -1,8 +1,6 @@
 import os
 import unittest
-from testgres import stop_all, clean_all
 from .helpers.ptrack_helpers import ProbackupTest, idx_ptrack
-import shutil
 
 
 class SimpleTest(ProbackupTest, unittest.TestCase):
@@ -10,11 +8,6 @@ class SimpleTest(ProbackupTest, unittest.TestCase):
         super(SimpleTest, self).__init__(*args, **kwargs)
         self.module_name = 'ptrack_vacuum_truncate'
 
-    # @classmethod
-    # def tearDownClass(self):
-    #    clean_all()
-    #    shutil.rmtree(os.path.join(self.tmp_path, self.module_name), ignore_errors=True)
-
     # @unittest.skip("skip")
     # @unittest.expectedFailure
     def test_ptrack_vacuum_truncate(self):
diff --git a/tests/replica.py b/tests/replica.py
index 7e2745c2..b74afaad 100644
--- a/tests/replica.py
+++ b/tests/replica.py
@@ -1,12 +1,8 @@
-import unittest
 import os
+import unittest
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException, idx_ptrack
 from datetime import datetime, timedelta
-from testgres import stop_all, clean_all
 import subprocess
-from sys import exit
-import time
-import shutil
 
 
 class ReplicaTest(ProbackupTest, unittest.TestCase):
@@ -15,11 +11,6 @@ class ReplicaTest(ProbackupTest, unittest.TestCase):
         super(ReplicaTest, self).__init__(*args, **kwargs)
         self.module_name = 'replica'
 
-    # @classmethod
-    # def tearDownClass(cls):
-    #    clean_all()
-    #    shutil.rmtree(os.path.join(self.tmp_path, self.module_name), ignore_errors=True)
-
     # @unittest.skip("skip")
     # @unittest.expectedFailure
     def test_replica_stream_full_backup(self):
diff --git a/tests/restore_test.py b/tests/restore_test.py
index 015030f5..4715e2a7 100644
--- a/tests/restore_test.py
+++ b/tests/restore_test.py
@@ -1,10 +1,8 @@
-import unittest
 import os
+import unittest
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException
-from testgres import stop_all, clean_all
 import subprocess
 from datetime import datetime
-from sys import exit
 
 
 class RestoreTest(ProbackupTest, unittest.TestCase):
diff --git a/tests/retention_test.py b/tests/retention_test.py
index 750deaf3..d7702793 100644
--- a/tests/retention_test.py
+++ b/tests/retention_test.py
@@ -1,10 +1,7 @@
-import unittest
 import os
+import unittest
 from datetime import datetime, timedelta
-from os import path, listdir
 from .helpers.ptrack_helpers import ProbackupTest
-from testgres import stop_all, clean_all
-import shutil
 
 
 class RetentionTest(ProbackupTest, unittest.TestCase):
@@ -52,7 +49,7 @@ class RetentionTest(ProbackupTest, unittest.TestCase):
                 min_wal = line[31:-1]
             elif line.startswith("INFO: removed max WAL segment"):
                 max_wal = line[31:-1]
-        for wal_name in listdir(os.path.join(backup_dir, 'wal', 'node')):
+        for wal_name in os.listdir(os.path.join(backup_dir, 'wal', 'node')):
             if not wal_name.endswith(".backup"):
                 #wal_name_b = wal_name.encode('ascii')
                 self.assertEqual(wal_name[8:] > min_wal[8:], True)
@@ -85,12 +82,12 @@ class RetentionTest(ProbackupTest, unittest.TestCase):
         # Make backup to be keeped
         self.backup_node(backup_dir, 'node', node)
 
-        backups = path.join(backup_dir, 'backups', 'node')
+        backups = os.path.join(backup_dir, 'backups', 'node')
         days_delta = 5
-        for backup in listdir(backups):
+        for backup in os.listdir(backups):
             if backup == 'pg_probackup.conf':
                 continue
-            with open(path.join(backups, backup, "backup.control"), "a") as conf:
+            with open(os.path.join(backups, backup, "backup.control"), "a") as conf:
                 conf.write("recovery_time='{:%Y-%m-%d %H:%M:%S}'\n".format(
                     datetime.now() - timedelta(days=days_delta)))
                 days_delta -= 1
diff --git a/tests/show_test.py b/tests/show_test.py
index edd50dbe..4a3df501 100644
--- a/tests/show_test.py
+++ b/tests/show_test.py
@@ -1,9 +1,6 @@
-import unittest
 import os
-from os import path
+import unittest
 from .helpers.ptrack_helpers import ProbackupTest
-from testgres import stop_all, clean_all
-import shutil
 
 
 class OptionTest(ProbackupTest, unittest.TestCase):
@@ -55,7 +52,7 @@ class OptionTest(ProbackupTest, unittest.TestCase):
         backup_id = self.backup_node(backup_dir, 'node', node)
 
         # delete file which belong to backup
-        file = path.join(backup_dir, "backups", "node", backup_id, "database", "postgresql.conf")
+        file = os.path.join(backup_dir, "backups", "node", backup_id, "database", "postgresql.conf")
         os.remove(file)
 
         self.validate_pb(backup_dir, 'node', backup_id)
diff --git a/tests/validate_test.py b/tests/validate_test.py
index ffdc3660..20f823de 100644
--- a/tests/validate_test.py
+++ b/tests/validate_test.py
@@ -1,10 +1,8 @@
-import unittest
 import os
+import unittest
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException
 from datetime import datetime, timedelta
-from testgres import stop_all, clean_all
 import subprocess
-from sys import exit
 
 
 class ValidateTest(ProbackupTest, unittest.TestCase):