diff --git a/docs/development.md b/docs/development.md
index 5bb0a4f9..a19dd02e 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -1,9 +1,9 @@
 ## Development
 
-To develop or debug `HttpRunner`, you can install relevant requirements and use `main-hrun.py` or `main-locust.py` as entrances.
+To develop or debug `HttpRunner`, you can install relevant requirements and use `httprunner/cli.py` as entrances.
 
 ```bash
 $ python setup.py install
-$ python main-hrun -h
-$ python main-locust -h
+$ python httprunner/cli.py hrun -h
+$ python httprunner/cli.py locust -h
 ```
diff --git a/httprunner/cli.py b/httprunner/cli.py
index f8fdece1..b3f0c796 100644
--- a/httprunner/cli.py
+++ b/httprunner/cli.py
@@ -5,15 +5,14 @@ import sys
 import unittest
 from collections import OrderedDict
 
+from httprunner import __version__ as hrun_version
+from httprunner import logger
+from httprunner.exception import TestcaseNotFound
+from httprunner.task import Result, TaskSuite
+from httprunner.utils import create_scaffold, print_output, string_type
 from pyunitreport import __version__ as pyu_version
 from pyunitreport import HTMLTestRunner
 
-from . import __version__ as hrun_version
-from . import logger
-from .exception import TestcaseNotFound
-from .task import Result, TaskSuite
-from .utils import create_scaffold, print_output, string_type
-
 
 def run_suite_path(path, mapping=None, runner=None):
     """ run suite with YAML/JSON file path
@@ -144,3 +143,12 @@ def main_locust():
         locusts.run_locusts_on_cpu_cores(sys.argv, cpu_cores_num_value)
     else:
         locusts.main()
+
+
+if __name__ == '__main__':
+    cmd = sys.argv.pop(1)
+
+    if cmd == "hrun":
+        main_hrun()
+    elif cmd == "locust":
+        main_locust()
diff --git a/httprunner/client.py b/httprunner/client.py
index 6d65d2c5..fb3161ac 100644
--- a/httprunner/client.py
+++ b/httprunner/client.py
@@ -4,13 +4,12 @@ import time
 
 import requests
 import urllib3
+from httprunner import logger
+from httprunner.exception import ParamsError
 from requests import Request, Response
 from requests.exceptions import (InvalidSchema, InvalidURL, MissingSchema,
                                  RequestException)
 
-from . import logger
-from .exception import ParamsError
-
 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
 
 absolute_http_url_regexp = re.compile(r"^https?://", re.I)
diff --git a/httprunner/locusts.py b/httprunner/locusts.py
index 9bcdc459..66a16ce3 100644
--- a/httprunner/locusts.py
+++ b/httprunner/locusts.py
@@ -3,10 +3,10 @@ import multiprocessing
 import os
 import sys
 
-from locust.main import main
+from httprunner.logger import color_print
+from httprunner.testcase import load_test_file
 
-from .logger import color_print
-from .testcase import load_test_file
+from locust.main import main
 
 
 def parse_locustfile(file_path):
diff --git a/httprunner/response.py b/httprunner/response.py
index 5f006d12..3813a951 100644
--- a/httprunner/response.py
+++ b/httprunner/response.py
@@ -1,10 +1,9 @@
 import re
 from collections import OrderedDict
 
+from httprunner import exception, logger, testcase, utils
 from requests.structures import CaseInsensitiveDict
 
-from . import exception, logger, testcase, utils
-
 text_extractor_regexp_compile = re.compile(r".*\(.*\).*")
 
 
diff --git a/httprunner/runner.py b/httprunner/runner.py
index 4a777577..63e3d284 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -1,8 +1,8 @@
 from unittest.case import SkipTest
 
-from . import exception, logger, response, testcase, utils
-from .client import HttpSession
-from .context import Context
+from httprunner import exception, logger, response, testcase, utils
+from httprunner.client import HttpSession
+from httprunner.context import Context
 
 
 class Runner(object):
diff --git a/httprunner/task.py b/httprunner/task.py
index 48fabdde..b3db2be6 100644
--- a/httprunner/task.py
+++ b/httprunner/task.py
@@ -1,6 +1,6 @@
 import unittest
 
-from . import exception, logger, runner, testcase, utils
+from httprunner import exception, logger, runner, testcase, utils
 
 
 class ApiTestCase(unittest.TestCase):
diff --git a/httprunner/testcase.py b/httprunner/testcase.py
index 7fd441a7..5cfcd22e 100644
--- a/httprunner/testcase.py
+++ b/httprunner/testcase.py
@@ -8,8 +8,7 @@ import re
 from collections import OrderedDict
 
 import yaml
-
-from . import exception, logger, utils
+from httprunner import exception, logger, utils
 
 variable_regexp = r"\$([\w_]+)"
 function_regexp = r"\$\{([\w_]+\([\$\w_ =,]*\))\}"
diff --git a/httprunner/utils.py b/httprunner/utils.py
index 7abc2e79..ae079935 100644
--- a/httprunner/utils.py
+++ b/httprunner/utils.py
@@ -9,10 +9,9 @@ import string
 import types
 from collections import OrderedDict
 
+from httprunner import exception, logger
 from requests.structures import CaseInsensitiveDict
 
-from . import exception, logger
-
 try:
     string_type = basestring
     long_type = long
diff --git a/main-hrun.py b/main-hrun.py
deleted file mode 100644
index 2611ba9b..00000000
--- a/main-hrun.py
+++ /dev/null
@@ -1,5 +0,0 @@
-""" used for debugging
-"""
-
-from httprunner.cli import main_hrun
-main_hrun()
diff --git a/main-locust.py b/main-locust.py
deleted file mode 100644
index ea79ce4d..00000000
--- a/main-locust.py
+++ /dev/null
@@ -1,5 +0,0 @@
-""" used for debugging
-"""
-
-from httprunner.cli import main_locust
-main_locust()