diff --git a/examples/postman_echo/request_methods/conf.py b/examples/postman_echo/request_methods/conf.py
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/postman_echo/request_methods/hardcode_test.py b/examples/postman_echo/request_methods/hardcode_test.py
index c23d1fc1..1b4a535a 100644
--- a/examples/postman_echo/request_methods/hardcode_test.py
+++ b/examples/postman_echo/request_methods/hardcode_test.py
@@ -1,83 +1,79 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
+
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
 
 
-class TestCaseRequestMethodsHardcode(TestCaseRunner):
-    config = TestsConfig(**{
-        "name": "request methods testcase in hardcode",
-        "base_url": "https://postman-echo.com",
-        "verify": False
-    })
+class TestCaseHardcode(unittest.TestCase):
+    config = TestsConfig(
+        **{
+            "name": "request methods testcase in hardcode",
+            "base_url": "https://postman-echo.com",
+            "verify": False,
+            "path": "examples/postman_echo/request_methods/hardcode_test.py",
+        }
+    )
 
     teststeps = [
-        TestStep(**{
-            "name": "get with params",
-            "request": {
-                "method": "GET",
-                "url": "/get",
-                "params": {
-                    "foo1": "bar1",
-                    "foo2": "bar2"
+        TestStep(
+            **{
+                "name": "get with params",
+                "request": {
+                    "method": "GET",
+                    "url": "/get",
+                    "params": {"foo1": "bar1", "foo2": "bar2"},
+                    "headers": {"User-Agent": "HttpRunner/3.0"},
                 },
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0"
-                }
-            },
-            "extract": {
-                "server": "headers.Server"
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": ["headers.Server", "nginx"]}
-            ]
-        }),
-        TestStep(**{
-            "name": "post raw text",
-            "request": {
-                "method": "POST",
-                "url": "/post",
-                "data": "This is expected to be sent back as part of response body.",
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0",
-                    "Content-Type": "text/plain"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]}
-            ]
-        }),
-        TestStep(**{
-            "name": "post form data",
-            "request": {
-                "method": "POST",
-                "url": "/post",
-                "data": "foo1=bar1&foo2=bar2",
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0",
-                    "Content-Type": "application/x-www-form-urlencoded"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]}
-            ]
-        }),
-        TestStep(**{
-            "name": "put request",
-            "request": {
-                "method": "PUT",
-                "url": "/put",
-                "data": "This is expected to be sent back as part of response body.",
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0",
-                    "Content-Type": "text/plain"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]}
-            ]
-        })
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "post raw text",
+                "request": {
+                    "method": "POST",
+                    "url": "/post",
+                    "headers": {
+                        "User-Agent": "HttpRunner/3.0",
+                        "Content-Type": "text/plain",
+                    },
+                    "data": "This is expected to be sent back as part of response body.",
+                },
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "post form data",
+                "request": {
+                    "method": "POST",
+                    "url": "/post",
+                    "headers": {
+                        "User-Agent": "HttpRunner/3.0",
+                        "Content-Type": "application/x-www-form-urlencoded",
+                    },
+                    "data": "foo1=bar1&foo2=bar2",
+                },
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "put request",
+                "request": {
+                    "method": "PUT",
+                    "url": "/put",
+                    "headers": {
+                        "User-Agent": "HttpRunner/3.0",
+                        "Content-Type": "text/plain",
+                    },
+                    "data": "This is expected to be sent back as part of response body.",
+                },
+                "validate": [{"eq": ["status_code", 200]}],
+            }
+        ),
     ]
 
-
-if __name__ == '__main__':
-    TestCaseRequestMethodsHardcode().run()
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
diff --git a/examples/postman_echo/request_methods/request_with_functions_test.py b/examples/postman_echo/request_methods/request_with_functions_test.py
index 66c73d66..d45fd718 100644
--- a/examples/postman_echo/request_methods/request_with_functions_test.py
+++ b/examples/postman_echo/request_methods/request_with_functions_test.py
@@ -1,98 +1,90 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
+
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
-from examples.postman_echo import debugtalk
 
 
-class TestCaseRequestMethodsWithFunctions(TestCaseRunner):
-    config = TestsConfig(**{
-        "name": "request methods testcase with functions",
-        "variables": {
-            "foo1": "session_bar1"
-        },
-        "functions": {
-            "get_httprunner_version": debugtalk.get_httprunner_version,
-            "sum_two": debugtalk.sum_two
-        },
-        "base_url": "https://postman-echo.com",
-        "verify": False
-    })
+class TestCaseRequestWithFunctions(unittest.TestCase):
+    config = TestsConfig(
+        **{
+            "name": "request methods testcase with functions",
+            "variables": {"foo1": "session_bar1"},
+            "base_url": "https://postman-echo.com",
+            "verify": False,
+            "path": "examples/postman_echo/request_methods/request_with_functions_test.py",
+        }
+    )
 
     teststeps = [
-        TestStep(**{
-            "name": "get with params",
-            "variables": {
-                "foo1": "bar1",
-                "foo2": "session_bar2",
-                "sum_v": "${sum_two(1, 2)}"
-            },
-            "request": {
-                "method": "GET",
-                "url": "/get",
-                "params": {
-                    "foo1": "$foo1",
-                    "foo2": "$foo2",
-                    "sum_v": "$sum_v"
+        TestStep(
+            **{
+                "name": "get with params",
+                "variables": {
+                    "foo1": "bar1",
+                    "foo2": "session_bar2",
+                    "sum_v": "${sum_two(1, 2)}",
                 },
-                "headers": {
-                    "User-Agent": "HttpRunner/${get_httprunner_version()}"
-                }
-            },
-            "extract": {
-                "session_foo2": "body.args.foo2"
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": ["body.args.foo1", "session_bar1"]},
-                {"eq": ["body.args.foo2", "session_bar2"]},
-                {"eq": ["body.args.sum_v", 3]}
-            ]
-        }),
-        TestStep(**{
-            "name": "post raw text",
-            "variables": {
-                "foo1": "hello world",
-                "foo3": "$session_foo2"
-            },
-            "request": {
-                "method": "POST",
-                "url": "/post",
-                "data": "This is expected to be sent back as part of response body: $foo1-$foo3.",
-                "headers": {
-                    "User-Agent": "HttpRunner/${get_httprunner_version()}",
-                    "Content-Type": "text/plain"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": [
-                    "body.data",
-                    "This is expected to be sent back as part of response body: session_bar1-session_bar2."
-                ]},
-            ]
-        }),
-        TestStep(**{
-            "name": "post form data",
-            "variables": {
-                "foo1": "session_bar1",
-                "foo2": "bar2"
-            },
-            "request": {
-                "method": "POST",
-                "url": "/post",
-                "data": "foo1=$foo1&foo2=$foo2",
-                "headers": {
-                    "User-Agent": "HttpRunner/${get_httprunner_version()}",
-                    "Content-Type": "application/x-www-form-urlencoded"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": ["body.form.foo1", "session_bar1"]},
-                {"eq": ["body.form.foo2", "bar2"]}
-            ]
-        })
+                "request": {
+                    "method": "GET",
+                    "url": "/get",
+                    "params": {"foo1": "$foo1", "foo2": "$foo2", "sum_v": "$sum_v"},
+                    "headers": {"User-Agent": "HttpRunner/${get_httprunner_version()}"},
+                },
+                "extract": {"session_foo2": "body.args.foo2"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.args.foo1", "session_bar1"]},
+                    {"eq": ["body.args.sum_v", 3]},
+                    {"eq": ["body.args.foo2", "session_bar2"]},
+                ],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "post raw text",
+                "variables": {"foo1": "hello world", "foo3": "$session_foo2"},
+                "request": {
+                    "method": "POST",
+                    "url": "/post",
+                    "headers": {
+                        "User-Agent": "HttpRunner/${get_httprunner_version()}",
+                        "Content-Type": "text/plain",
+                    },
+                    "data": "This is expected to be sent back as part of response body: $foo1-$foo3.",
+                },
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {
+                        "eq": [
+                            "body.data",
+                            "This is expected to be sent back as part of response body: session_bar1-session_bar2.",
+                        ]
+                    },
+                ],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "post form data",
+                "variables": {"foo1": "bar1", "foo2": "bar2"},
+                "request": {
+                    "method": "POST",
+                    "url": "/post",
+                    "headers": {
+                        "User-Agent": "HttpRunner/${get_httprunner_version()}",
+                        "Content-Type": "application/x-www-form-urlencoded",
+                    },
+                    "data": "foo1=$foo1&foo2=$foo2",
+                },
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.form.foo1", "session_bar1"]},
+                    {"eq": ["body.form.foo2", "bar2"]},
+                ],
+            }
+        ),
     ]
 
-
-if __name__ == '__main__':
-    TestCaseRequestMethodsWithFunctions().run()
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
diff --git a/examples/postman_echo/request_methods/request_with_testcase_reference_test.py b/examples/postman_echo/request_methods/request_with_testcase_reference_test.py
index f33a82b5..7ec814a4 100644
--- a/examples/postman_echo/request_methods/request_with_testcase_reference_test.py
+++ b/examples/postman_echo/request_methods/request_with_testcase_reference_test.py
@@ -1,34 +1,30 @@
-from examples.postman_echo import debugtalk
-from examples.postman_echo.request_methods.validate_with_variables_test \
-    import TestCaseRequestMethodsValidateWithVariables
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
+
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
 
 
-class TestCaseRequestMethodsRefTestcase(TestCaseRunner):
-    config = TestsConfig(**{
-        "name": "request methods testcase: reference testcase",
-        "variables": {
-            "foo1": "session_bar1"
-        },
-        "functions": {
-            "get_httprunner_version": debugtalk.get_httprunner_version,
-            "sum_two": debugtalk.sum_two
-        },
-        "base_url": "https://postman-echo.com",
-        "verify": False
-    })
+class TestCaseRequestWithTestcaseReference(unittest.TestCase):
+    config = TestsConfig(
+        **{
+            "name": "request methods testcase: reference testcase",
+            "variables": {"foo1": "session_bar1"},
+            "base_url": "https://postman-echo.com",
+            "verify": False,
+            "path": "examples/postman_echo/request_methods/request_with_testcase_reference_test.py",
+        }
+    )
 
     teststeps = [
-        TestStep(**{
-            "name": "get with params",
-            "variables": {
-                "foo1": "override_bar1"
-            },
-            "testcase": TestCaseRequestMethodsValidateWithVariables
-        })
+        TestStep(
+            **{
+                "name": "request with variables",
+                "variables": {"foo1": "override_bar1"},
+                "testcase": "request_methods/request_with_variables.yml",
+            }
+        ),
     ]
 
-
-if __name__ == '__main__':
-    TestCaseRequestMethodsRefTestcase().run()
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
diff --git a/examples/postman_echo/request_methods/request_with_variables_test.py b/examples/postman_echo/request_methods/request_with_variables_test.py
index 9fdfbcd4..b351e92b 100644
--- a/examples/postman_echo/request_methods/request_with_variables_test.py
+++ b/examples/postman_echo/request_methods/request_with_variables_test.py
@@ -1,14 +1,18 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
+
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
 
 
-class TestCaseRequestWithVariables(TestCaseRunner):
+class TestCaseRequestWithVariables(unittest.TestCase):
     config = TestsConfig(
         **{
             "name": "request methods testcase with variables",
             "variables": {"foo1": "session_bar1"},
             "base_url": "https://postman-echo.com",
             "verify": False,
+            "path": "examples/postman_echo/request_methods/request_with_variables_test.py",
         }
     )
 
@@ -77,6 +81,5 @@ class TestCaseRequestWithVariables(TestCaseRunner):
         ),
     ]
 
-
-if __name__ == "__main__":
-    TestCaseRequestWithVariables().run()
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
diff --git a/examples/postman_echo/request_methods/validate_with_functions_test.py b/examples/postman_echo/request_methods/validate_with_functions_test.py
index a580040c..82b7d454 100644
--- a/examples/postman_echo/request_methods/validate_with_functions_test.py
+++ b/examples/postman_echo/request_methods/validate_with_functions_test.py
@@ -1,53 +1,45 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
+
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
-from examples.postman_echo import debugtalk
 
 
-class TestCaseRequestMethodsValidateWithFunctions(TestCaseRunner):
-    config = TestsConfig(**{
-        "name": "request methods testcase: validate with functions",
-        "variables": {
-            "foo1": "session_bar1"
-        },
-        "functions": {
-            "get_httprunner_version": debugtalk.get_httprunner_version,
-            "sum_two": debugtalk.sum_two
-        },
-        "base_url": "https://postman-echo.com",
-        "verify": False
-    })
+class TestCaseValidateWithFunctions(unittest.TestCase):
+    config = TestsConfig(
+        **{
+            "name": "request methods testcase: validate with functions",
+            "variables": {"foo1": "session_bar1"},
+            "base_url": "https://postman-echo.com",
+            "verify": False,
+            "path": "examples/postman_echo/request_methods/validate_with_functions_test.py",
+        }
+    )
 
     teststeps = [
-        TestStep(**{
-            "name": "get with params",
-            "variables": {
-                "foo1": "bar1",
-                "foo2": "session_bar2",
-                "sum_v": "${sum_two(1, 2)}"
-            },
-            "request": {
-                "method": "GET",
-                "url": "/get",
-                "params": {
-                    "foo1": "$foo1",
-                    "foo2": "$foo2",
-                    "sum_v": "$sum_v"
+        TestStep(
+            **{
+                "name": "get with params",
+                "variables": {
+                    "foo1": "bar1",
+                    "foo2": "session_bar2",
+                    "sum_v": "${sum_two(1, 2)}",
                 },
-                "headers": {
-                    "User-Agent": "HttpRunner/${get_httprunner_version()}"
-                }
-            },
-            "extract": {
-                "session_foo2": "body.args.foo2"
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": ["body.args.sum_v", 3]},
-                {"less_than": ["body.args.sum_v", "${sum_two(2, 2)}"]}
-            ]
-        })
+                "request": {
+                    "method": "GET",
+                    "url": "/get",
+                    "params": {"foo1": "$foo1", "foo2": "$foo2", "sum_v": "$sum_v"},
+                    "headers": {"User-Agent": "HttpRunner/${get_httprunner_version()}"},
+                },
+                "extract": {"session_foo2": "body.args.foo2"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.args.sum_v", 3]},
+                    {"less_than": ["body.args.sum_v", "${sum_two(2, 2)}"]},
+                ],
+            }
+        ),
     ]
 
-
-if __name__ == '__main__':
-    TestCaseRequestMethodsValidateWithFunctions().run()
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
diff --git a/examples/postman_echo/request_methods/validate_with_variables_test.py b/examples/postman_echo/request_methods/validate_with_variables_test.py
index 6db6c6e0..0293766c 100644
--- a/examples/postman_echo/request_methods/validate_with_variables_test.py
+++ b/examples/postman_echo/request_methods/validate_with_variables_test.py
@@ -1,99 +1,85 @@
+# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
+
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
 
 
-class TestCaseRequestMethodsValidateWithVariables(TestCaseRunner):
-    config = TestsConfig(**{
-        "name": "request methods testcase: validate with variables",
-        "variables": {
-            "foo1": "session_bar1"
-        },
-        "base_url": "https://postman-echo.com",
-        "verify": False
-    })
+class TestCaseValidateWithVariables(unittest.TestCase):
+    config = TestsConfig(
+        **{
+            "name": "request methods testcase: validate with variables",
+            "variables": {"foo1": "session_bar1"},
+            "base_url": "https://postman-echo.com",
+            "verify": False,
+            "path": "examples/postman_echo/request_methods/validate_with_variables_test.py",
+        }
+    )
 
     teststeps = [
-        TestStep(**{
-            "name": "get with params",
-            "variables": {
-                "foo1": "bar1",
-                "foo2": "session_bar2"
-            },
-            "request": {
-                "method": "GET",
-                "url": "/get",
-                "params": {
-                    "foo1": "$foo1",
-                    "foo2": "$foo2"
+        TestStep(
+            **{
+                "name": "get with params",
+                "variables": {"foo1": "bar1", "foo2": "session_bar2"},
+                "request": {
+                    "method": "GET",
+                    "url": "/get",
+                    "params": {"foo1": "$foo1", "foo2": "$foo2"},
+                    "headers": {"User-Agent": "HttpRunner/3.0"},
                 },
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0"
-                }
-            },
-            "extract": {
-                "session_foo2": "body.args.foo2"
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": ["body.args.foo1", "session_bar1"]},
-                {"eq": ["body.args.foo1", "$foo1"]},
-                {"eq": ["body.args.foo2", "session_bar2"]},
-                {"eq": ["body.args.foo2", "$foo2"]}
-            ]
-        }),
-        TestStep(**{
-            "name": "post raw text",
-            "variables": {
-                "foo1": "hello world",
-                "foo3": "$session_foo2"
-            },
-            "request": {
-                "method": "POST",
-                "url": "/post",
-                "data": "This is expected to be sent back as part of response body: $foo1-$foo3.",
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0",
-                    "Content-Type": "text/plain"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": [
-                    "body.data",
-                    "This is expected to be sent back as part of response body: session_bar1-session_bar2."
-                ]},
-                {"eq": [
-                    "body.data",
-                    "This is expected to be sent back as part of response body: $foo1-$foo3."
-                ]},
-            ]
-        }),
-        TestStep(**{
-            "name": "post form data",
-            "variables": {
-                "foo1": "session_bar1",
-                "foo2": "bar2"
-            },
-            "request": {
-                "method": "POST",
-                "url": "/post",
-                "data": "foo1=$foo1&foo2=$foo2",
-                "headers": {
-                    "User-Agent": "HttpRunner/3.0",
-                    "Content-Type": "application/x-www-form-urlencoded"
-                }
-            },
-            "validate": [
-                {"eq": ["status_code", 200]},
-                {"eq": ["body.form.foo1", "session_bar1"]},
-                {"eq": ["body.form.foo1", "$foo1"]},
-                {"eq": ["body.form.foo2", "bar2"]},
-                {"eq": ["body.form.foo2", "$foo2"]}
-            ]
-        })
+                "extract": {"session_foo2": "body.args.foo2"},
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.args.foo1", "$foo1"]},
+                    {"eq": ["body.args.foo2", "$foo2"]},
+                ],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "post raw text",
+                "variables": {"foo1": "hello world", "foo3": "$session_foo2"},
+                "request": {
+                    "method": "POST",
+                    "url": "/post",
+                    "headers": {
+                        "User-Agent": "HttpRunner/3.0",
+                        "Content-Type": "text/plain",
+                    },
+                    "data": "This is expected to be sent back as part of response body: $foo1-$foo3.",
+                },
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {
+                        "eq": [
+                            "body.data",
+                            "This is expected to be sent back as part of response body: session_bar1-$foo3.",
+                        ]
+                    },
+                ],
+            }
+        ),
+        TestStep(
+            **{
+                "name": "post form data",
+                "variables": {"foo1": "bar1", "foo2": "bar2"},
+                "request": {
+                    "method": "POST",
+                    "url": "/post",
+                    "headers": {
+                        "User-Agent": "HttpRunner/3.0",
+                        "Content-Type": "application/x-www-form-urlencoded",
+                    },
+                    "data": "foo1=$foo1&foo2=$foo2",
+                },
+                "validate": [
+                    {"eq": ["status_code", 200]},
+                    {"eq": ["body.form.foo1", "$foo1"]},
+                    {"eq": ["body.form.foo2", "$foo2"]},
+                ],
+            }
+        ),
     ]
 
-
-if __name__ == '__main__':
-    runner = TestCaseRequestMethodsValidateWithVariables().run()
-    print(runner.step_datas)
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
diff --git a/httprunner/api.py b/httprunner/api.py
index 40569576..5f615e44 100644
--- a/httprunner/api.py
+++ b/httprunner/api.py
@@ -75,7 +75,7 @@ class HttpRunner(object):
             testcase.config.variables.update(project_meta.variables)
             testcase.config.functions.update(project_meta.functions)
 
-            test_runner = TestCaseRunner().init(testcase)
+            test_runner = TestCaseRunner(testcase.config, testcase.teststeps)
 
             TestSequense = type("TestSequense", (unittest.TestCase,), {})
             test_method = _add_test(test_runner)
diff --git a/httprunner/make.py b/httprunner/make.py
index 0e8d838d..7d7efe12 100644
--- a/httprunner/make.py
+++ b/httprunner/make.py
@@ -3,14 +3,17 @@ import os
 import jinja2
 from loguru import logger
 
-from httprunner.new_loader import load_testcase_file
+from httprunner import exceptions
+from httprunner.new_loader import load_testcase_file, load_folder_files
+
+__TMPL__ = """# NOTICE: Generated By HttpRunner. DO'NOT EDIT!
+import unittest
 
-__TMPL__ = """
 from httprunner.runner import TestCaseRunner
 from httprunner.schema import TestsConfig, TestStep
 
 
-class {{ class_name }}(TestCaseRunner):
+class {{ class_name }}(unittest.TestCase):
     config = TestsConfig(**{{ config }})
 
     teststeps = [
@@ -19,31 +22,50 @@ class {{ class_name }}(TestCaseRunner):
         {% endfor %}
     ]
 
+    def test_start(self):
+        TestCaseRunner(self.config, self.teststeps).run()
 
-if __name__ == '__main__':
-    {{ class_name }}().run()
 """
 
 
-def make_testcase(path: str) -> str:
-    testcase = load_testcase_file(path)
+def make_testcase(testcase_path: str) -> str:
+    testcase = load_testcase_file(testcase_path)
     template = jinja2.Template(__TMPL__)
 
-    raw_file_name, _ = os.path.splitext(os.path.basename(path))
+    raw_file_name, _ = os.path.splitext(os.path.basename(testcase_path))
     # convert title case, e.g. request_with_variables => RequestWithVariables
     name_in_title_case = raw_file_name.title().replace("_", "")
 
+    testcase_dir = os.path.dirname(testcase_path)
+    testcase_python_path = os.path.join(testcase_dir, f"{raw_file_name}_test.py")
+
+    config = testcase["config"]
+    config["path"] = testcase_python_path
     data = {
         "class_name": f"TestCase{name_in_title_case}",
-        "config": testcase["config"],
+        "config": config,
         "teststeps": testcase["teststeps"],
     }
     content = template.render(data)
 
-    testcase_dir = os.path.dirname(path)
-    testcase_python_path = os.path.join(testcase_dir, f"{raw_file_name}_test.py")
     with open(testcase_python_path, "w") as f:
         f.write(content)
 
     logger.info(f"generated testcase: {testcase_python_path}")
     return testcase_python_path
+
+
+def make(tests_path: str) -> list:
+    testcases = []
+    if os.path.isdir(tests_path):
+        files_list = load_folder_files(tests_path)
+        testcases.extend(files_list)
+    elif os.path.isfile(tests_path):
+        testcases.append(tests_path)
+    else:
+        raise exceptions.TestcaseNotFound(f"Invalid tests path: {tests_path}")
+
+    return [
+        make_testcase(testcase_path)
+        for testcase_path in testcases
+    ]
diff --git a/httprunner/make_test.py b/httprunner/make_test.py
new file mode 100644
index 00000000..9fd9faf7
--- /dev/null
+++ b/httprunner/make_test.py
@@ -0,0 +1,21 @@
+import unittest
+from httprunner.make import make_testcase, make
+
+
+class TestLoader(unittest.TestCase):
+
+    def test_make_testcase(self):
+        path = "examples/postman_echo/request_methods/request_with_variables.yml"
+        testcase_python_path = make_testcase(path)
+        self.assertEqual(
+            testcase_python_path,
+            "examples/postman_echo/request_methods/request_with_variables_test.py"
+        )
+
+    def test_make_testcase_folder(self):
+        path = "examples/postman_echo/request_methods/"
+        testcase_python_list = make(path)
+        self.assertIn(
+            "examples/postman_echo/request_methods/request_with_functions_test.py",
+            testcase_python_list
+        )
diff --git a/httprunner/new_loader.py b/httprunner/new_loader.py
index f7efc1cc..b42b8395 100644
--- a/httprunner/new_loader.py
+++ b/httprunner/new_loader.py
@@ -1,12 +1,14 @@
+import importlib
 import io
 import json
 import os
+import sys
 import types
 
 import yaml
 from loguru import logger
 
-from httprunner import builtin
+from httprunner import builtin, utils
 from httprunner import exceptions
 from httprunner.schema import TestCase
 
@@ -64,6 +66,47 @@ def load_testcase_file(testcase_file):
     return testcase_content
 
 
+def load_dot_env_file(dot_env_path):
+    """ load .env file.
+
+    Args:
+        dot_env_path (str): .env file path
+
+    Returns:
+        dict: environment variables mapping
+
+            {
+                "UserName": "debugtalk",
+                "Password": "123456",
+                "PROJECT_KEY": "ABCDEFGH"
+            }
+
+    Raises:
+        exceptions.FileFormatError: If .env file format is invalid.
+
+    """
+    if not os.path.isfile(dot_env_path):
+        return {}
+
+    logger.info(f"Loading environment variables from {dot_env_path}")
+    env_variables_mapping = {}
+
+    with io.open(dot_env_path, "r", encoding="utf-8") as fp:
+        for line in fp:
+            # maxsplit=1
+            if "=" in line:
+                variable, value = line.split("=", 1)
+            elif ":" in line:
+                variable, value = line.split(":", 1)
+            else:
+                raise exceptions.FileFormatError(".env format error")
+
+            env_variables_mapping[variable.strip()] = value.strip()
+
+    utils.set_os_environ(env_variables_mapping)
+    return env_variables_mapping
+
+
 def load_folder_files(folder_path, recursive=True):
     """ load folder path, return all files endswith yml/yaml/json in list.
 
@@ -133,3 +176,169 @@ def load_builtin_functions():
     """ load builtin module functions
     """
     return load_module_functions(builtin)
+
+
+def locate_file(start_path, file_name):
+    """ locate filename and return absolute file path.
+        searching will be recursive upward until current working directory or system root dir.
+
+    Args:
+        file_name (str): target locate file name
+        start_path (str): start locating path, maybe file path or directory path
+
+    Returns:
+        str: located file path. None if file not found.
+
+    Raises:
+        exceptions.FileNotFound: If failed to locate file.
+
+    """
+    if os.path.isfile(start_path):
+        start_dir_path = os.path.dirname(start_path)
+    elif os.path.isdir(start_path):
+        start_dir_path = start_path
+    else:
+        raise exceptions.FileNotFound(f"invalid path: {start_path}")
+
+    file_path = os.path.join(start_dir_path, file_name)
+    if os.path.isfile(file_path):
+        return os.path.abspath(file_path)
+
+    # current working directory
+    if os.path.abspath(start_dir_path) == os.getcwd():
+        raise exceptions.FileNotFound(f"{file_name} not found in {start_path}")
+
+    # system root dir
+    # Windows, e.g. 'E:\\'
+    # Linux/Darwin, '/'
+    parent_dir = os.path.dirname(start_dir_path)
+    if parent_dir == start_dir_path:
+        raise exceptions.FileNotFound(f"{file_name} not found in {start_path}")
+
+    # locate recursive upward
+    return locate_file(parent_dir, file_name)
+
+
+def locate_debugtalk_py(start_path):
+    """ locate debugtalk.py file
+
+    Args:
+        start_path (str): start locating path,
+            maybe testcase file path or directory path
+
+    Returns:
+        str: debugtalk.py file path, None if not found
+
+    """
+    try:
+        # locate debugtalk.py file.
+        debugtalk_path = locate_file(start_path, "debugtalk.py")
+    except exceptions.FileNotFound:
+        debugtalk_path = None
+
+    return debugtalk_path
+
+
+def init_project_working_directory(test_path):
+    """ this should be called at startup
+
+        run test file:
+            run_path -> load_cases -> load_project_data -> init_project_working_directory
+        or run passed in data structure:
+            run -> init_project_working_directory
+
+    Args:
+        test_path: specified testfile path
+
+    Returns:
+        (str, str): debugtalk.py path, project_working_directory
+
+    """
+
+    def prepare_path(path):
+        if not os.path.exists(path):
+            err_msg = f"path not exist: {path}"
+            logger.error(err_msg)
+            raise exceptions.FileNotFound(err_msg)
+
+        if not os.path.isabs(path):
+            path = os.path.join(os.getcwd(), path)
+
+        return path
+
+    test_path = prepare_path(test_path)
+
+    # locate debugtalk.py file
+    debugtalk_path = locate_debugtalk_py(test_path)
+
+    global project_working_directory
+    if debugtalk_path:
+        # The folder contains debugtalk.py will be treated as PWD.
+        project_working_directory = os.path.dirname(debugtalk_path)
+    else:
+        # debugtalk.py not found, use os.getcwd() as PWD.
+        project_working_directory = os.getcwd()
+
+    # add PWD to sys.path
+    sys.path.insert(0, project_working_directory)
+
+    return debugtalk_path, project_working_directory
+
+
+def load_debugtalk_functions():
+    """ load project debugtalk.py module functions
+        debugtalk.py should be located in project working directory.
+
+    Returns:
+        dict: debugtalk module functions mapping
+            {
+                "func1_name": func1,
+                "func2_name": func2
+            }
+
+    """
+    # load debugtalk.py module
+    imported_module = importlib.import_module("debugtalk")
+    return load_module_functions(imported_module)
+
+
+def load_project_data(test_path: str, dot_env_path: str = None):
+    """ load api, testcases, .env, debugtalk.py functions.
+        api/testcases folder is relative to project_working_directory
+
+    Args:
+        test_path (str): test file/folder path, locate pwd from this path.
+        dot_env_path (str): specified .env file path
+
+    Returns:
+        dict: project loaded api/testcases definitions,
+            environments and debugtalk.py functions.
+
+    """
+    debugtalk_path, project_working_directory = init_project_working_directory(
+        test_path
+    )
+
+    project_meta = {}
+
+    # load .env file
+    # NOTICE:
+    # environment variable maybe loaded in debugtalk.py
+    # thus .env file should be loaded before loading debugtalk.py
+    dot_env_path = dot_env_path or os.path.join(project_working_directory, ".env")
+    project_meta["env"] = load_dot_env_file(dot_env_path)
+
+    if debugtalk_path:
+        # load debugtalk.py functions
+        debugtalk_functions = load_debugtalk_functions()
+    else:
+        debugtalk_functions = {}
+
+    # locate PWD and load debugtalk.py functions
+    project_meta["PWD"] = project_working_directory
+    project_meta["functions"] = debugtalk_functions
+    project_meta["test_path"] = os.path.abspath(test_path)[
+        len(project_working_directory) + 1 :
+    ]
+
+    return project_meta
diff --git a/httprunner/runner.py b/httprunner/runner.py
index 828747f4..bbeee279 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -2,38 +2,30 @@ from typing import List, Dict
 
 from loguru import logger
 
-from httprunner import utils
+from httprunner import utils, exceptions
 from httprunner.client import HttpSession
 from httprunner.exceptions import ValidationFailure, ParamsError
+from httprunner.new_loader import load_project_data
 from httprunner.parser import build_url, parse_data, parse_variables_mapping
 from httprunner.response import ResponseObject
 from httprunner.schema import (
     TestsConfig,
     TestStep,
     VariablesMapping,
-    TestCase,
     StepData,
 )
 
 
 class TestCaseRunner(object):
 
-    config: TestsConfig = {}
-    teststeps: List[TestStep] = []
-    session: HttpSession = None
-    step_datas: List[StepData] = []
-    validation_results: Dict = {}
-    session_variables: Dict = {}
-    success: bool = True  # indicate testcase execution result
-
-    def init(self, testcase: TestCase) -> "TestCaseRunner":
-        self.config = testcase.config
-        self.teststeps = testcase.teststeps
-        return self
-
-    def with_session(self, s: HttpSession) -> "TestCaseRunner":
-        self.session = s
-        return self
+    def __init__(self, config: TestsConfig, teststeps: List[TestStep], session: HttpSession = None):
+        self.config = config
+        self.teststeps = teststeps
+        self.session = session
+        self.step_datas: List[StepData] = []
+        self.validation_results: Dict = {}
+        self.session_variables: Dict = {}
+        self.success: bool = True  # indicate testcase execution result
 
     def with_variables(self, **variables: VariablesMapping) -> "TestCaseRunner":
         self.config.variables.update(variables)
@@ -142,8 +134,14 @@ class TestCaseRunner(object):
         self.step_datas.append(step_data)
         return step_data.export
 
-    def test_start(self):
+    def run(self):
         """main entrance"""
+        if not self.config.path:
+            raise exceptions.ParamsError("config path missed!")
+
+        project_data = load_project_data(self.config.path)
+        self.config.functions = project_data["functions"]
+
         self.step_datas.clear()
         self.session_variables.clear()
         for step in self.teststeps:
@@ -162,10 +160,6 @@ class TestCaseRunner(object):
 
         return self
 
-    def run(self):
-        """main entrance alias for test_start"""
-        return self.test_start()
-
     def get_export_variables(self):
         export_vars_mapping = {}
         for var_name in self.config.export:
diff --git a/httprunner/schema.py b/httprunner/schema.py
index 58078094..0130f769 100644
--- a/httprunner/schema.py
+++ b/httprunner/schema.py
@@ -40,6 +40,7 @@ class TestsConfig(BaseModel):
     setup_hooks: Hook = []
     teardown_hooks: Hook = []
     export: Export = []
+    path: Text = None
 
 
 class Request(BaseModel):