diff --git a/httprunner/builtin/comparators.py b/httprunner/builtin/comparators.py
index 91520625..975c868d 100644
--- a/httprunner/builtin/comparators.py
+++ b/httprunner/builtin/comparators.py
@@ -77,7 +77,7 @@ def type_match(check_value, expect_value):
     def get_type(name):
         if isinstance(name, type):
             return name
-        elif isinstance(name, str, bytes):
+        elif isinstance(name, str):
             try:
                 return __builtins__[name]
             except KeyError:
diff --git a/httprunner/loader/load.py b/httprunner/loader/load.py
index 158cf5b3..fcee9ca3 100644
--- a/httprunner/loader/load.py
+++ b/httprunner/loader/load.py
@@ -38,7 +38,7 @@ def _load_json_file(json_file):
     with io.open(json_file, encoding='utf-8') as data_file:
         try:
             json_content = json.load(data_file)
-        except exceptions.JSONDecodeError:
+        except json.JSONDecodeError:
             err_msg = f"JSONDecodeError: JSON file format error: {json_file}"
             logger.error(err_msg)
             raise exceptions.FileFormatError(err_msg)
diff --git a/httprunner/response.py b/httprunner/response.py
index d3fa78c6..d4d815fb 100644
--- a/httprunner/response.py
+++ b/httprunner/response.py
@@ -1,3 +1,4 @@
+import json
 import re
 from collections import OrderedDict
 
@@ -199,7 +200,7 @@ class ResponseObject(object):
         elif top_query in ["body", "content", "text", "json"]:
             try:
                 body = self.json
-            except exceptions.JSONDecodeError:
+            except json.JSONDecodeError:
                 body = self.text
 
             if not sub_query:
diff --git a/tests/test_api.py b/tests/test_api.py
index 1ce8884c..948f629d 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -470,7 +470,6 @@ class TestHttpRunner(ApiServerUnittest):
         self.assertEqual(summary["details"][1]["stat"]["total"], 1)
         self.assertEqual(summary["details"][2]["stat"]["total"], 1)
 
-
     def test_run_testcase_hardcode(self):
         for testcase_file_path in self.testcase_file_path_list:
             summary = self.runner.run(testcase_file_path)
@@ -479,7 +478,6 @@ class TestHttpRunner(ApiServerUnittest):
             self.assertEqual(summary["stat"]["teststeps"]["total"], 3)
             self.assertEqual(summary["stat"]["teststeps"]["successes"], 3)
 
-
     def test_run_testcase_template_variables(self):
         testcase_file_path = os.path.join(
             os.getcwd(), 'tests/data/demo_testcase_variables.yml')