diff --git a/example/agent/iot_agent_usage.py b/example/agent/iot_agent_usage.py
index 175f552d..3d926b6f 100644
--- a/example/agent/iot_agent_usage.py
+++ b/example/agent/iot_agent_usage.py
@@ -14,11 +14,11 @@
 
 def main():
     # MQTT broker address and port
-    broker_address = "XXX"
+    broker_address = "xxx"
     broker_port = 1883
     # username and password
-    username = "XXX"
-    password = "XXX"
+    username = "xxx"
+    password = "xxx"
     client = mqtt.Client()
     client.username_pw_set(username, password)
     client.connect(broker_address, broker_port)
@@ -41,7 +41,7 @@ def main():
         ),
     ]
     agent = ToolAgent(tools)
-    prompt = """现在你是一个智能音箱，我现在感觉好暗"""
+    prompt = """现在你是一个智能音箱，你可以控制冷气，加热器和灯的开关，在开关之前请尽量询问人类，我现在感觉好暗。"""
     agent.run(prompt)
 
 
diff --git a/promptulate/tools/human_feedback/tools.py b/promptulate/tools/human_feedback/tools.py
index 2dee1ee7..4e1ca9b0 100644
--- a/promptulate/tools/human_feedback/tools.py
+++ b/promptulate/tools/human_feedback/tools.py
@@ -1,8 +1,14 @@
-from promptulate.tools import BaseTool
+from typing import Callable
+
+from promptulate.tools import Tool
 from promptulate.utils.color_print import print_text
 
 
-class HumanFeedBackTool(BaseTool):
+def _print_func(content) -> None:
+    print_text(f"[Agent ask] {content}", "blue")
+
+
+class HumanFeedBackTool(Tool):
     """A tool for running python code in a REPL."""
 
     name: str = "human_feedback"
@@ -14,6 +20,16 @@ class HumanFeedBackTool(BaseTool):
         "humans reason. "
     )
 
+    def __init__(
+        self,
+        prompt_func: Callable[[str], None] = _print_func,
+        input_func: Callable = input,
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+        self.prompt_func = prompt_func
+        self.input_func = input_func
+
     def _run(self, content: str, *args, **kwargs) -> str:
-        print_text(f"[Agent ask] {content}", "blue")
-        return input()
+        self.prompt_func(content)
+        return self.input_func()
diff --git a/promptulate/tools/iot_swith_mqtt/tools.py b/promptulate/tools/iot_swith_mqtt/tools.py
index 81ad5aec..936a6ce1 100644
--- a/promptulate/tools/iot_swith_mqtt/tools.py
+++ b/promptulate/tools/iot_swith_mqtt/tools.py
@@ -23,12 +23,20 @@ class IotSwitchTool(Tool):
         "If the operation of the device is successful, an OK will be returned, otherwise a failure will be returned."
     )
     llm_prompt_template: StringTemplate = prompt_template
-    llm: BaseLLM = ChatOpenAI(temperature=0.1)
     client: mqtt.Client
     rule_table: List[Dict]
     api_wrapper: IotSwitchAPIWrapper = IotSwitchAPIWrapper()
 
-    def __init__(self, client: mqtt.Client, rule_table: List[Dict], **kwargs):
+    def __init__(
+        self,
+        llm: BaseLLM = None,
+        client: mqtt.Client = None,
+        rule_table: List[Dict] = None,
+        **kwargs
+    ):
+        self.llm: BaseLLM = llm or ChatOpenAI(
+            temperature=0.1, enable_preset_description=False
+        )
         self.client = client
         self.rule_table = rule_table
 
diff --git a/promptulate/tools/math/tools.py b/promptulate/tools/math/tools.py
index 62360224..83ab7c6c 100644
--- a/promptulate/tools/math/tools.py
+++ b/promptulate/tools/math/tools.py
@@ -19,7 +19,12 @@ class Calculator(Tool):
         "language of math expression."
     )
     llm_prompt_template: StringTemplate = prompt_template
-    llm: BaseLLM = ChatOpenAI(temperature=0, enable_preset_description=False)
+
+    def __init__(self, llm: BaseLLM = None, **kwargs):
+        self.llm: BaseLLM = llm or ChatOpenAI(
+            temperature=0, enable_preset_description=False
+        )
+        super().__init__(**kwargs)
 
     def _run(self, prompt: str) -> str:
         prompt = self.llm_prompt_template.format(question=prompt)
diff --git a/tests/tools/test_human_feedback_toos.py b/tests/tools/test_human_feedback_toos.py
index 70375436..bd358b2c 100644
--- a/tests/tools/test_human_feedback_toos.py
+++ b/tests/tools/test_human_feedback_toos.py
@@ -4,7 +4,15 @@
 
 
 class TestHumanFeedBackTool(TestCase):
+    def prompt_func(self, content: str) -> None:
+        print(content)
+
+    def input_func(self):
+        return input()
+
     def test_run(self):
-        tool = HumanFeedBackTool()
+        tool = HumanFeedBackTool(
+            prompt_func=self.prompt_func, input_func=self.input_func
+        )
         result = tool.run("我好冷")
         print(result)
diff --git a/tests/tools/test_sleep_tools.py b/tests/tools/test_sleep_tools.py
index 2ae213b1..9af64701 100644
--- a/tests/tools/test_sleep_tools.py
+++ b/tests/tools/test_sleep_tools.py
@@ -12,7 +12,7 @@
 class TestSleepTool(TestCase):
     def test_run(self):
         tool = SleepTool()
-        seconds = 1
+        seconds = "1s"
         start_time = time.time()
         result = tool.run(seconds)
         duration = time.time() - start_time