diff --git a/autogpt/json_fixes/auto_fix.py b/autogpt/json_fixes/auto_fix.py
index 9c632332..ac648460 100644
--- a/autogpt/json_fixes/auto_fix.py
+++ b/autogpt/json_fixes/auto_fix.py
@@ -1,16 +1,17 @@
 """This module contains the function to fix JSON strings using GPT-3."""
 import json
+
 from autogpt.llm_utils import call_ai_function
 from autogpt.logs import logger
 from autogpt.config import Config
 cfg = Config()
 
 
-def fix_json(json_str: str, schema: str) -> str:
+def fix_json(json_string: str, schema: str) -> str:
     """Fix the given JSON string to make it parseable and fully compliant with the provided schema."""
     # Try to fix the JSON using GPT:
-    function_string = "def fix_json(json_str: str, schema:str=None) -> str:"
-    args = [f"'''{json_str}'''", f"'''{schema}'''"]
+    function_string = "def fix_json(json_string: str, schema:str=None) -> str:"
+    args = [f"'''{json_string}'''", f"'''{schema}'''"]
     description_string = (
         "Fixes the provided JSON string to make it parseable"
         " and fully compliant with the provided schema.\n If an object or"
@@ -20,13 +21,13 @@ def fix_json(json_str: str, schema: str) -> str:
     )
 
     # If it doesn't already start with a "`", add one:
-    if not json_str.startswith("`"):
-        json_str = "```json\n" + json_str + "\n```"
+    if not json_string.startswith("`"):
+        json_string = "```json\n" + json_string + "\n```"
     result_string = call_ai_function(
         function_string, args, description_string, model=cfg.fast_llm_model
     )
     logger.debug("------------ JSON FIX ATTEMPT ---------------")
-    logger.debug(f"Original JSON: {json_str}")
+    logger.debug(f"Original JSON: {json_string}")
     logger.debug("-----------")
     logger.debug(f"Fixed JSON: {result_string}")
     logger.debug("----------- END OF FIX ATTEMPT ----------------")
@@ -34,9 +35,9 @@ def fix_json(json_str: str, schema: str) -> str:
     try:
         json.loads(result_string)  # just check the validity
         return result_string
-    except:  # noqa: E722
+    except json.JSONDecodeError:  # noqa: E722
         # Get the call stack:
         # import traceback
         # call_stack = traceback.format_exc()
-        # print(f"Failed to fix JSON: '{json_str}' "+call_stack)
+        # print(f"Failed to fix JSON: '{json_string}' "+call_stack)
         return "failed"