diff --git a/src/backup.c b/src/backup.c
index 1d58d9f2..0dd681fa 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -538,8 +538,8 @@ do_backup_instance(void)
 	}
 
 	/*
-	 * It`s illegal to take PTRACK backup if LSN from ptrack_control() is not equal to
-	 * stort_backup LSN of previous backup
+	 * It`s illegal to take PTRACK backup if LSN from ptrack_control() is not
+	 * equal to stop_lsn of previous backup.
 	 */
 	if (current.backup_mode == BACKUP_MODE_DIFF_PTRACK)
 	{
@@ -1193,7 +1193,8 @@ pg_ptrack_support(void)
 
 	/* Now we support only ptrack versions upper than 1.5 */
 	if (strcmp(PQgetvalue(res_db, 0, 0), "1.5") != 0 &&
-		strcmp(PQgetvalue(res_db, 0, 0), "1.6") != 0)
+		strcmp(PQgetvalue(res_db, 0, 0), "1.6") != 0 &&
+		strcmp(PQgetvalue(res_db, 0, 0), "1.7") != 0)
 	{
 		elog(WARNING, "Update your ptrack to the version 1.5 or upper. Current version is %s", PQgetvalue(res_db, 0, 0));
 		PQclear(res_db);
@@ -1283,7 +1284,9 @@ pg_ptrack_clear(void)
 		tblspcOid = atoi(PQgetvalue(res_db, i, 2));
 
 		tmp_conn = pgut_connect(dbname);
-		res = pgut_execute(tmp_conn, "SELECT pg_catalog.pg_ptrack_clear()", 0, NULL);
+		res = pgut_execute(tmp_conn, "SELECT pg_catalog.pg_ptrack_clear()",
+						   0, NULL);
+		PQclear(res);
 
 		sprintf(params[0], "%i", dbOid);
 		sprintf(params[1], "%i", tblspcOid);
@@ -1512,7 +1515,8 @@ wait_wal_lsn(XLogRecPtr lsn, bool is_start_lsn, bool wait_prev_segment)
 	if (wait_prev_segment)
 		elog(LOG, "Looking for segment: %s", wal_segment);
 	else
-		elog(LOG, "Looking for LSN: %X/%X in segment: %s", (uint32) (lsn >> 32), (uint32) lsn, wal_segment);
+		elog(LOG, "Looking for LSN: %X/%X in segment: %s",
+			 (uint32) (lsn >> 32), (uint32) lsn, wal_segment);
 
 #ifdef HAVE_LIBZ
 	snprintf(gz_wal_segment_path, sizeof(gz_wal_segment_path), "%s.gz",
@@ -2648,7 +2652,8 @@ get_last_ptrack_lsn(void)
 	uint32		lsn_lo;
 	XLogRecPtr	lsn;
 
-	res = pgut_execute(backup_conn, "select pg_catalog.pg_ptrack_control_lsn()", 0, NULL);
+	res = pgut_execute(backup_conn, "select pg_catalog.pg_ptrack_control_lsn()",
+					   0, NULL);
 
 	/* Extract timeline and LSN from results of pg_start_backup() */
 	XLogDataFromLSN(PQgetvalue(res, 0, 0), &lsn_hi, &lsn_lo);
diff --git a/tests/__init__.py b/tests/__init__.py
index f7268469..3593f657 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -21,7 +21,6 @@ def load_tests(loader, tests, pattern):
 #    suite.addTests(loader.loadTestsFromModule(cfs_validate_backup))
 #    suite.addTests(loader.loadTestsFromModule(logging))
     suite.addTests(loader.loadTestsFromModule(compression))
-    suite.addTests(loader.loadTestsFromModule(compatibility))
     suite.addTests(loader.loadTestsFromModule(delete_test))
     suite.addTests(loader.loadTestsFromModule(delta))
     suite.addTests(loader.loadTestsFromModule(exclude))
@@ -62,8 +61,6 @@ def load_tests(loader, tests, pattern):
 #  logging:
 #     https://jira.postgrespro.ru/browse/PGPRO-584
 #     https://jira.postgrespro.ru/secure/attachment/20420/20420_doc_logging.md
-#  ptrack:
-#      ptrack backup on replica should work correctly
 # archive:
 #      immediate recovery and full recovery
 # backward compatibility:
diff --git a/tests/backup_test.py b/tests/backup_test.py
index 1fa74643..b21aab9b 100644
--- a/tests/backup_test.py
+++ b/tests/backup_test.py
@@ -520,3 +520,6 @@ class BackupTest(ProbackupTest, unittest.TestCase):
         if self.paranoia:
             pgdata_restored = self.pgdata_content(node.data_dir)
             self.compare_pgdata(pgdata, pgdata_restored)
+
+        # Clean after yourself
+        self.del_test_dir(module_name, fname)