diff --git a/src/rpmquery/querylayeriniso.py b/src/rpmquery/querylayeriniso.py
index c887fd7cb350592962c78423b0c2feb3c4223109..cfd34f9909767e08568d20f45424bc1342b385c3 100644
--- a/src/rpmquery/querylayeriniso.py
+++ b/src/rpmquery/querylayeriniso.py
@@ -12,17 +12,12 @@
 # See the Mulan PSL v2 for more details.
 # **********************************************************************************
 """
-import os
-import sys
-current_path = os.path.dirname(__file__)
-parent_path = os.path.dirname(current_path)
-sys.path.append(parent_path)
 
-from rpmquery import RpmQuery
-from utils.util import ISOUtils
-from utils.depparse import ISODepParse
-from utils.config import BaseConfig
-from main.alglayer import AlgLayer
+from .rpmquery import RpmQuery
+from src.utils.util import ISOUtils
+from src.utils.depparse import ISODepParse
+from src.utils.config import BaseConfig
+from src.main.alglayer import AlgLayer
 
 
 class QueryLayerInIso(RpmQuery):
diff --git a/src/rpmquery/rpmquery.py b/src/rpmquery/rpmquery.py
index 22e4bc4e08b9833915ac60610e34201490a7f222..fb76e64fc7684bbdc91432885aeddc62df14567e 100644
--- a/src/rpmquery/rpmquery.py
+++ b/src/rpmquery/rpmquery.py
@@ -15,7 +15,7 @@
 
 import rpm
 
-from rpmhdrinfo import RpmHdrInfo
+from .rpmhdrinfo import RpmHdrInfo
 
 class RpmQuery(object):
     """
diff --git a/test/test_rpmcheck.py b/test/test_rpmcheck.py
index 93707ce2bcf84ecec9e7c658de6df340ffee4c4a..7435802002be22ba6a745822ab68bbadefa5f3dc 100644
--- a/test/test_rpmcheck.py
+++ b/test/test_rpmcheck.py
@@ -37,6 +37,15 @@ class TestRpmCheck(unittest.TestCase):
         """
         result = self.rpm_check.check_exist()
         self.assertIn(result, [True, False], "check_exist test failed!")
+    
+    def test_check_formate(self):
+        """
+            Test class method check_formate()
+        Returns:
+            bool
+        """
+        result = self.rpm_check.check_formate()
+        self.assertIn(result, [True, False], "check_formate test failed!")
 
 
 if __name__ == "__main__":