diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 1daf3c66..818a173c 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 **Changed**
 
+- replace jsonschema validation with pydantic
 - remove compatibility with testcase/testsuite format v1
 
 ## 3.0.1 (2020-03-24)
diff --git a/httprunner/__init__.py b/httprunner/__init__.py
index 831c6293..ed28b566 100644
--- a/httprunner/__init__.py
+++ b/httprunner/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "3.0.1"
+__version__ = "3.0.2"
 __description__ = "One-stop solution for HTTP(S) testing."
 
 __all__ = ["__version__", "__description__"]
diff --git a/httprunner/loader/buildup.py b/httprunner/loader/buildup.py
index 9652bded..3d9a16c6 100644
--- a/httprunner/loader/buildup.py
+++ b/httprunner/loader/buildup.py
@@ -277,7 +277,7 @@ def load_test_file(path: str) -> dict:
         loaded_content["type"] = "testsuite"
 
     elif "teststeps" in raw_content:
-        # file_type: testcase (format version 2)
+        # file_type: testcase
         loaded_content = load_testcase(raw_content)
         loaded_content["path"] = path
         loaded_content["type"] = "testcase"
@@ -329,12 +329,12 @@ def load_project_data(test_path, dot_env_path=None):
     # locate PWD and load debugtalk.py functions
     project_mapping["PWD"] = project_working_directory
     project_mapping["functions"] = debugtalk_functions
-    project_mapping["test_path"] = os.path.abspath(test_path)[len(project_working_directory)+1:]
+    project_mapping["test_path"] = os.path.abspath(test_path)[len(project_working_directory) + 1:]
 
     return project_mapping
 
 
-def load_cases(path, dot_env_path=None):
+def load_cases(path: str, dot_env_path: str = None):
     """ load testcases from file path, extend and merge with api/testcase definitions.
 
     Args:
diff --git a/httprunner/loader/check.py b/httprunner/loader/check.py
index 4e6ce8e8..c899634a 100644
--- a/httprunner/loader/check.py
+++ b/httprunner/loader/check.py
@@ -1,70 +1,43 @@
-import io
-import json
 import os
-import platform
 
-import jsonschema
 from loguru import logger
+from pydantic import ValidationError
 
 from httprunner import exceptions
-
-schemas_root_dir = os.path.join(os.path.dirname(__file__), "schemas")
-common_schema_path = os.path.join(schemas_root_dir, "common.schema.json")
-api_schema_path = os.path.join(schemas_root_dir, "api.schema.json")
-testcase_schema_path = os.path.join(schemas_root_dir, "testcase.schema.json")
-testsuite_schema_path = os.path.join(schemas_root_dir, "testsuite.schema.json")
-
-with io.open(api_schema_path, encoding='utf-8') as f:
-    api_schema = json.load(f)
-
-with io.open(common_schema_path, encoding='utf-8') as f:
-    if platform.system() == "Windows":
-        absolute_base_path = 'file:///' + os.path.abspath(schemas_root_dir).replace("\\", "/") + '/'
-    else:
-        # Linux, Darwin
-        absolute_base_path = "file://" + os.path.abspath(schemas_root_dir) + "/"
-
-    common_schema = json.load(f)
-    resolver = jsonschema.RefResolver(absolute_base_path, common_schema)
-
-with io.open(testcase_schema_path, encoding='utf-8') as f:
-    testcase_schema = json.load(f)
-
-with io.open(testsuite_schema_path, encoding='utf-8') as f:
-    testsuite_schema = json.load(f)
+from httprunner.schema import Api, TestCase, TestSuite
 
 
 class JsonSchemaChecker(object):
 
-    @staticmethod
-    def validate_format(content, scheme):
-        """ check api/testcase/testsuite format if valid
-        """
-        try:
-            jsonschema.validate(content, scheme, resolver=resolver)
-        except jsonschema.exceptions.ValidationError as ex:
-            logger.error(str(ex))
-            raise exceptions.FileFormatError
-
-        return True
-
     @staticmethod
     def validate_api_format(content):
         """ check api format if valid
         """
-        return JsonSchemaChecker.validate_format(content, api_schema)
+        try:
+            Api.parse_obj(content)
+        except ValidationError as ex:
+            logger.error(ex)
+            raise exceptions.FileFormatError
 
     @staticmethod
     def validate_testcase_format(content):
         """ check testcase format if valid
         """
-        return JsonSchemaChecker.validate_format(content, testcase_schema)
+        try:
+            TestCase.parse_obj(content)
+        except ValidationError as ex:
+            logger.error(ex)
+            raise exceptions.FileFormatError
 
     @staticmethod
     def validate_testsuite_format(content):
         """ check testsuite format if valid
         """
-        return JsonSchemaChecker.validate_format(content, testsuite_schema)
+        try:
+            TestSuite.parse_obj(content)
+        except ValidationError as ex:
+            logger.error(ex)
+            raise exceptions.FileFormatError
 
 
 def is_test_path(path):
diff --git a/httprunner/loader/schemas/api.schema.json b/httprunner/loader/schemas/api.schema.json
deleted file mode 100644
index f59b924f..00000000
--- a/httprunner/loader/schemas/api.schema.json
+++ /dev/null
@@ -1,59 +0,0 @@
-{
-    "$schema": "http://json-schema.org/draft-07/schema",
-    "description": "httprunner api schema definition",
-    "type": "object",
-    "properties": {
-        "name": {
-            "$ref": "common.schema.json#/definitions/name"
-        },
-        "base_url": {
-            "$ref": "common.schema.json#/definitions/base_url"
-        },
-        "variables": {
-            "$ref": "common.schema.json#/definitions/variables"
-        },
-        "request": {
-            "$ref": "common.schema.json#/definitions/request"
-        },
-        "setup_hooks": {
-            "$ref": "common.schema.json#/definitions/hook"
-        },
-        "teardown_hooks": {
-            "$ref": "common.schema.json#/definitions/hook"
-        },
-        "extract": {
-            "$ref": "common.schema.json#/definitions/extract"
-        },
-        "validate": {
-            "$ref": "common.schema.json#/definitions/validate"
-        }
-    },
-    "required": [
-        "name",
-        "request"
-    ],
-    "examples": [
-        {
-            "name": "demo api",
-            "variables": {
-                "var1": "value1",
-                "var2": "value2"
-            },
-            "request": {
-                "url": "/api/path/$var1",
-                "method": "POST",
-                "headers": {
-                    "Content-Type": "application/json"
-                },
-                "json": {
-                    "key": "$var2"
-                },
-                "validate": [
-                    {
-                        "eq": ["status_code", 200]
-                    }
-                ]
-            }
-        }
-    ]
-}
\ No newline at end of file
diff --git a/httprunner/loader/schemas/common.schema.json b/httprunner/loader/schemas/common.schema.json
deleted file mode 100644
index 8986240c..00000000
--- a/httprunner/loader/schemas/common.schema.json
+++ /dev/null
@@ -1,392 +0,0 @@
-{
-    "$schema": "http://json-schema.org/draft-07/schema",
-    "description": "common json schema definitions for httprunner api/testcase/testsuite",
-    "definitions": {
-        "name": {
-            "description": "used as api/teststep/testcase/testsuite identification",
-            "type": "string",
-            "examples": [
-                "basic test for httpbin"
-            ]
-        },
-        "base_url": {
-            "description": "The base_url will be used with relative URI",
-            "type": "string",
-            "examples": [
-                "https://httpbin.org"
-            ]
-        },
-        "variables": {
-            "description": "define variables for api/teststep/testcase/testsuite",
-            "oneOf": [
-                {
-                    "type": "object",
-                    "examples": [
-                        {
-                            "var1": "value1",
-                            "var2": "value2"
-                        }
-                    ]
-                },
-                {
-                    "type": "array",
-                    "items": {
-                        "type": "object",
-                        "maxProperties": 1,
-                        "minProperties": 1
-                    },
-                    "examples": [
-                        [
-                            {
-                                "var1": "value1"
-                            },
-                            {
-                                "var2": "value2"
-                            }
-                        ]
-                    ]
-                },
-                {
-                    "type": "string",
-                    "pattern": "^\\$.*",
-                    "examples": [
-                        "$prepared_variables",
-                        "${prepare_variables()}",
-                        "${prepare_variables($a, $b)}"
-                    ]
-                }
-            ]
-        },
-        "verify": {
-            "description": "whether to verify the server’s TLS certificate",
-            "type": "boolean",
-            "examples": [
-                true,
-                false
-            ]
-        },
-        "hook": {
-            "description": "used to define setup_hooks/teardown_hooks for api/teststep/testcase",
-            "type": "array",
-            "items": {
-                "oneOf": [
-                    {
-                        "description": "call setup/teardown hook functions, return nothing",
-                        "type": "string",
-                        "examples": [
-                            [
-                                "${sleep(2)}",
-                                "${hook_print(setup)}",
-                                "${modify_request_json($request, android)}",
-                                "${alter_response($response)}"
-                            ]
-                        ]
-                    },
-                    {
-                        "description": "call setup/teardown hook functions, return value and assign to variable",
-                        "type": "object",
-                        "examples": [
-                            {
-                                "total": "${sum_two(1, 5)}"
-                            },
-                            {
-                                "filed_name": "get_decoded_response_field($response)"
-                            }
-                        ]
-                    }
-                ]
-            }
-        },
-        "config": {
-            "description": "used in testcase/testsuite to configure common fields",
-            "type": "object",
-            "properties": {
-                "name": {
-                    "$ref": "#/definitions/name"
-                },
-                "base_url": {
-                    "$ref": "#/definitions/base_url"
-                },
-                "variables": {
-                    "$ref": "#/definitions/variables"
-                },
-                "setup_hooks": {
-                    "$ref": "#/definitions/hook"
-                },
-                "teardown_hooks": {
-                    "$ref": "#/definitions/hook"
-                },
-                "verify": {
-                    "$ref": "#/definitions/verify"
-                }
-            },
-            "required": ["name"]
-        },
-        "request": {
-            "description": "used to define a api request. properties is the same as python package `requests.request`",
-            "type": "object",
-            "properties": {
-                "method": {
-                    "type": "string",
-                    "description": "request method",
-                    "enum": [
-                        "GET",
-                        "POST",
-                        "OPTIONS",
-                        "HEAD",
-                        "PUT",
-                        "PATCH",
-                        "DELETE",
-                        "CONNECT",
-                        "TRACE"
-                    ]
-                },
-                "url": {
-                    "description": "request url, may be absolute or relative URI",
-                    "type": "string",
-                    "examples": [
-                        "http://httpbin.org/get?a=1&b=2",
-                        "/get?a=1&b=2",
-                        "get?a=1&b=2"
-                    ]
-                },
-                "params": {
-                    "description": "query string for request url",
-                    "type": "object",
-                    "examples": [
-                        {
-                            "a": 1,
-                            "b": 2
-                        }
-                    ]
-                },
-                "data": {
-                    "anyOf": [
-                        {
-                            "description": "request body in json format",
-                            "type": "object",
-                            "examples": [
-                                {
-                                    "a": 1,
-                                    "b": 2
-                                }
-                            ]
-                        },
-                        {
-                            "description": "request body in application/x-www-form-urlencoded format",
-                            "type": "string",
-                            "examples": [
-                                "a=1&b=2"
-                            ]
-                        },
-                        {
-                            "description": "request body prepared with function, or reference a variable",
-                            "type": "string",
-                            "examples": [
-                                "$post_data",
-                                "${prepare_data($a, $b)}"
-                            ]
-                        }
-                    ]
-                },
-                "json": {
-                    "oneOf": [
-                        {
-                            "description": "request body in json format",
-                            "type": "object"
-                        },
-                        {
-                            "description": "request body prepared with function, or reference a variable",
-                            "type": "string",
-                            "pattern": "^\\$.*",
-                            "examples": [
-                                "$post_data",
-                                "${prepare_post_data($a, $b)}"
-                            ]
-                        }
-                    ]
-                },
-                "headers": {
-                    "description": "request headers",
-                    "oneOf": [
-                        {
-                            "description": "request headers in json format",
-                            "type": "object",
-                            "examples": [
-                                {
-                                    "User-Agent": "python-requests/2.18.4",
-                                    "Content-Type": "application/json"
-                                }
-                            ]
-                        },
-                        {
-                            "description": "request headers prepared with function, or reference a variable",
-                            "type": "string",
-                            "examples": [
-                                "$prepared_headers",
-                                "${prepare_headers($a, $b)}"
-                            ]
-                        }
-                    ]
-                },
-                "cookies": {
-                    "description": "request cookies",
-                    "type": "object"
-                },
-                "files": {
-                    "description": "request files, used to upload files",
-                    "type": "object"
-                },
-                "auth": {
-                    "description": "Auth tuple to enable Basic/Digest/Custom HTTP Auth.",
-                    "type": "array"
-                },
-                "timeout": {
-                    "description": "How many seconds to wait for the server to send data before giving up",
-                    "type": "number",
-                    "examples": [
-                        120
-                    ]
-                },
-                "allow_redirects": {
-                    "description": "Enable/disable GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to True",
-                    "type": "boolean"
-                },
-                "proxies": {
-                    "description": "Dictionary mapping protocol to the URL of the proxy",
-                    "type": "object"
-                },
-                "verify": {
-                    "description": "configure verify for current api/teststep",
-                    "$ref": "#/definitions/verify"
-                },
-                "stream": {
-                    "description": "if False, the response content will be immediately downloaded.",
-                    "type": "boolean"
-                },
-                "upload": {
-                    "description": "upload files",
-                    "type": "object",
-                    "examples": [
-                        {
-                            "file": "data/file_to_upload",
-                            "md5": "123"
-                        }
-                    ]
-                }
-            },
-            "required": [
-                "method",
-                "url"
-            ]
-        },
-        "extract": {
-            "description": "used to extract session variables for later requests",
-            "oneOf": [
-                {
-                    "type": "object",
-                    "patternProperties": {
-                        "^[A-Za-z_][A-Za-z0-9_]*$": {
-                            "description": "extraction rule for session variable, maybe in jsonpath/regex/jmespath",
-                            "type": "string"
-                        }
-                    },
-                    "examples": [
-                        {
-                            "code__by_jsonpath": "$.code",
-                            "item_id__by_jsonpath": "$..items.*.id",
-                            "var_name__by_regex": "\"LB[\\d]*(.*)RB[\\d]*\"",
-                            "content_type": "headers.content-type",
-                            "first_name": "content.person.name.first_name"
-                        }
-                    ]
-                },
-                {
-                    "type": "array",
-                    "items": {
-                        "type": "object",
-                        "patternProperties": {
-                            "^[A-Za-z_][A-Za-z0-9_]*$": {
-                                "description": "extraction rule for session variable, maybe in jsonpath/regex/jmespath",
-                                "type": "string"
-                            }
-                        },
-                        "minProperties": 1,
-                        "maxProperties": 1
-                    },
-                    "examples": [
-                        {
-                            "code__by_jsonpath": "$.code"
-                        },
-                        {
-                            "item_id__by_jsonpath": "$..items.*.id"
-                        },
-                        {
-                            "var_name__by_regex": "\"LB[\\d]*(.*)RB[\\d]*\""
-                        },
-                        {
-                            "content_type": "headers.content-type"
-                        },
-                        {
-                            "first_name": "content.person.name.first_name"
-                        }
-                    ]
-                }
-            ]
-        },
-        "validate": {
-            "description": "used to validate response fields",
-            "type": "array",
-            "items": {
-                "description": "one validator definition",
-                "oneOf": [
-                    {
-                        "type": "object",
-                        "properties": {
-                            "check": {
-                                "type": "string"
-                            },
-                            "comparator": {
-                                "type": "string"
-                            },
-                            "expect": {
-                                "description": "expected value"
-                            }
-                        },
-                        "required": ["check", "expect"],
-                        "examples": [
-                            {
-                                "check": "body.code",
-                                "comparator": "gt",
-                                "expect": 0
-                            },
-                            {
-                                "check": "status_code",
-                                "expect": 200
-                            }
-                        ]
-                    },
-                    {
-                        "type": "object",
-                        "patternProperties": {
-                            "^[A-Za-z_][A-Za-z0-9_]*$": {
-                                "description": "validate_func_name: [check_value, expect_value]",
-                                "type": "array",
-                                "minItems": 2,
-                                "maxItems": 2
-                            }
-                        },
-                        "examples": [
-                            {
-                                "eq": ["status_code", 200]
-                            },
-                            {
-                                "gt": ["body.code", 0]
-                            }
-                        ]
-                    }
-                ]
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/httprunner/loader/schemas/testcase.schema.json b/httprunner/loader/schemas/testcase.schema.json
deleted file mode 100644
index 9d098ef8..00000000
--- a/httprunner/loader/schemas/testcase.schema.json
+++ /dev/null
@@ -1,184 +0,0 @@
-{
-    "$schema": "http://json-schema.org/draft-07/schema",
-    "description": "httprunner testcase schema definition",
-    "type": "object",
-    "definitions": {
-        "teststep": {
-            "type": "object",
-            "oneOf": [
-                {
-                    "properties": {
-                        "name": {
-                            "$ref": "common.schema.json#/definitions/name"
-                        },
-                        "request": {
-                            "description": "define api request directly",
-                            "$ref": "common.schema.json#/definitions/request"
-                        },
-                        "variables": {
-                            "$ref": "common.schema.json#/definitions/variables"
-                        },
-                        "extract": {
-                            "$ref": "common.schema.json#/definitions/extract"
-                        },
-                        "validate": {
-                            "$ref": "common.schema.json#/definitions/validate"
-                        },
-                        "setup_hooks": {
-                            "$ref": "common.schema.json#/definitions/hook"
-                        },
-                        "teardown_hooks": {
-                            "$ref": "common.schema.json#/definitions/hook"
-                        }
-                    },
-                    "required": [
-                        "name",
-                        "request"
-                    ]
-                },
-                {
-                    "properties": {
-                        "name": {
-                            "$ref": "common.schema.json#/definitions/name"
-                        },
-                        "api": {
-                            "description": "api reference, value is api file relative path",
-                            "type": "string"
-                        },
-                        "variables": {
-                            "$ref": "common.schema.json#/definitions/variables"
-                        },
-                        "extract": {
-                            "oneOf": [
-                                {
-                                    "type": "array",
-                                    "items": {
-                                        "type": "string"
-                                    }
-                                },
-                                {
-                                    "$ref": "common.schema.json#/definitions/extract"
-                                }
-                            ]
-                        },
-                        "validate": {
-                            "$ref": "common.schema.json#/definitions/validate"
-                        },
-                        "setup_hooks": {
-                            "$ref": "common.schema.json#/definitions/hook"
-                        },
-                        "teardown_hooks": {
-                            "$ref": "common.schema.json#/definitions/hook"
-                        }
-                    },
-                    "required": [
-                        "name",
-                        "api"
-                    ]
-                },
-                {
-                    "properties": {
-                        "name": {
-                            "$ref": "common.schema.json#/definitions/name"
-                        },
-                        "testcase": {
-                            "description": "testcase reference, value is testcase file relative path",
-                            "type": "string"
-                        },
-                        "variables": {
-                            "$ref": "common.schema.json#/definitions/variables"
-                        },
-                        "extract": {
-                            "type": "array",
-                            "items": {
-                                "type": "string"
-                            }
-                        },
-                        "setup_hooks": {
-                            "$ref": "common.schema.json#/definitions/hook"
-                        },
-                        "teardown_hooks": {
-                            "$ref": "common.schema.json#/definitions/hook"
-                        }
-                    },
-                    "required": [
-                        "name",
-                        "testcase"
-                    ]
-                }
-            ]
-        }
-    },
-    "properties": {
-        "config": {
-            "$ref": "common.schema.json#/definitions/config"
-        },
-        "teststeps": {
-            "description": "teststep of a testcase",
-            "type": "array",
-            "minItems": 1,
-            "items": {
-                "$ref": "testcase.schema.json#/definitions/teststep"
-            }
-        }
-    },
-    "required": [
-        "config",
-        "teststeps"
-    ],
-    "examples": [
-        {
-            "config": {
-                "name": "testcase name"
-            },
-            "teststeps": [
-                {
-                    "name": "api 1",
-                    "api": "/path/to/api1"
-                },
-                {
-                    "name": "api 2",
-                    "api": "/path/to/api2"
-                }
-            ]
-        },
-        {
-            "config": {
-                "name": "demo testcase",
-                "variables": {
-                    "device_sn": "ABC",
-                    "username": "${ENV(USERNAME)}",
-                    "password": "${ENV(PASSWORD)}"
-                },
-                "base_url": "http://127.0.0.1:5000"
-            },
-            "teststeps": [
-                {
-                    "name": "demo step 1",
-                    "api": "path/to/api1.yml",
-                    "variables": {
-                        "user_agent": "iOS/10.3",
-                        "device_sn": "$device_sn"
-                    },
-                    "extract": [
-                        {
-                            "token": "content.token"
-                        }
-                    ],
-                    "validate": [
-                        {
-                            "eq": ["status_code", 200]
-                        }
-                    ]
-                },
-                {
-                    "name": "demo step 2",
-                    "api": "path/to/api2.yml",
-                    "variables": {
-                        "token": "$token"
-                    }
-                }
-            ]
-        }
-    ]
-}
\ No newline at end of file
diff --git a/httprunner/loader/schemas/testsuite.schema.json b/httprunner/loader/schemas/testsuite.schema.json
deleted file mode 100644
index 0b3d35ef..00000000
--- a/httprunner/loader/schemas/testsuite.schema.json
+++ /dev/null
@@ -1,88 +0,0 @@
-{
-    "$schema": "http://json-schema.org/draft-07/schema",
-    "description": "httprunner testsuite schema definition",
-    "type": "object",
-    "definitions": {
-        "testcase": {
-            "type": "object",
-            "properties": {
-                "name": {
-                     "$ref": "common.schema.json#/definitions/name"
-                },
-                "variables": {
-                    "$ref": "common.schema.json#/definitions/variables"
-                },
-                "parameters": {
-                    "description": "generate cartesian product variables with parameters, each group of variables will be run once",
-                    "type": "object"
-                },
-                "testcase": {
-                    "description": "testcase reference, value is testcase file relative path",
-                    "type": "string"
-                }
-            },
-            "required": [
-                "testcase"
-            ]
-        }
-    },
-    "properties": {
-        "config": {
-            "$ref": "common.schema.json#/definitions/config"
-        },
-        "testcases": {
-            "description": "testcase of a testsuite",
-            "type": "array",
-            "minItems": 1,
-            "items": {
-                "$ref": "testsuite.schema.json#/definitions/testcase"
-            }
-        }
-    },
-    "required": [
-        "config",
-        "testcases"
-    ],
-    "examples": [
-        {
-            "config": {
-                "name": "testsuite name"
-            },
-            "testcases": [
-                {
-                    "name": "testcase 1",
-                    "testcase": "/path/to/testcase1"
-                },
-                {
-                    "name": "testcase 2",
-                    "testcase": "/path/to/testcase2"
-                }
-            ]
-        },
-        {
-            "config": {
-                "name": "demo testsuite",
-                "variables": {
-                    "device_sn": "XYZ"
-                },
-                "base_url": "http://127.0.0.1:5000"
-            },
-            "testcases": [
-                {
-                    "name": "call demo_testcase with data 1",
-                    "testcase": "path/to/demo_testcase.yml",
-                    "variables": {
-                        "device_sn": "$device_sn"
-                    }
-                },
-                {
-                    "name": "call demo_testcase with data 2",
-                    "testcase": "path/to/demo_testcase.yml",
-                    "variables": {
-                        "device_sn": "$device_sn"
-                    }
-                }
-            ]
-        }
-    ]
-}
\ No newline at end of file
diff --git a/httprunner/schema/__init__.py b/httprunner/schema/__init__.py
index 9009366e..12be9833 100644
--- a/httprunner/schema/__init__.py
+++ b/httprunner/schema/__init__.py
@@ -1 +1,3 @@
+from .api import Api
 from .testcase import ProjectMeta, TestCase, TestCases
+from .testsuite import TestSuite
diff --git a/httprunner/schema/api.py b/httprunner/schema/api.py
index 855d2487..48f73e38 100644
--- a/httprunner/schema/api.py
+++ b/httprunner/schema/api.py
@@ -1,4 +1,4 @@
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 
 from httprunner.schema import common
 
@@ -7,8 +7,8 @@ class Api(BaseModel):
     name: common.Name
     request: common.Request
     variables: common.Variables
-    base_url: common.BaseUrl
-    setup_hooks: common.Hook
-    teardown_hooks: common.Hook
-    extract: common.Extract
-    validate: common.Validate
+    base_url: common.BaseUrl = ""
+    setup_hooks: common.Hook = []
+    teardown_hooks: common.Hook = []
+    extract: common.Extract = {}
+    validation: common.Validate = Field([], alias="validate")
diff --git a/httprunner/schema/common.py b/httprunner/schema/common.py
index 9acd2cf0..c146ca06 100644
--- a/httprunner/schema/common.py
+++ b/httprunner/schema/common.py
@@ -1,11 +1,11 @@
 from enum import Enum
-from typing import Dict, List, Any, Tuple
+from typing import Dict, List, Any
 
 from pydantic import BaseModel, HttpUrl, Field
 
 Name = str
-Url = HttpUrl
-BaseUrl = str
+Url = str
+BaseUrl = HttpUrl
 Variables = Dict[str, Any]
 Headers = Dict[str, str]
 Verify = bool
diff --git a/httprunner/schema/testcase.py b/httprunner/schema/testcase.py
index 4ead072e..72d92287 100644
--- a/httprunner/schema/testcase.py
+++ b/httprunner/schema/testcase.py
@@ -13,7 +13,8 @@ class ProjectMeta(BaseModel):
 
 class TestStep(BaseModel):
     name: common.Name
-    request: common.Request
+    api: str = None     # TODO: replace with FilePath
+    request: common.Request = None
     extract: Dict[str, str] = {}
     validation: common.Validate = Field([], alias="validate")
 
diff --git a/httprunner/schema/testsuite.py b/httprunner/schema/testsuite.py
new file mode 100644
index 00000000..841479fb
--- /dev/null
+++ b/httprunner/schema/testsuite.py
@@ -0,0 +1,10 @@
+from typing import List
+
+from pydantic import BaseModel
+
+from httprunner.schema import common, TestCase
+
+
+class TestSuite(BaseModel):
+    config: common.TestsConfig
+    testcases: List[TestCase]
diff --git a/poetry.lock b/poetry.lock
index 323313b0..5d03bd2f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -12,20 +12,6 @@ version = "0.2.2"
 python = "<3.7"
 version = "2.4"
 
-[[package]]
-category = "main"
-description = "Classes Without Boilerplate"
-name = "attrs"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
-
-[package.extras]
-azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
-dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
-docs = ["sphinx", "zope.interface"]
-tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
-
 [[package]]
 category = "main"
 description = "Python package for providing Mozilla's CA Bundle."
@@ -176,22 +162,6 @@ optional = false
 python-versions = "*"
 version = "0.11"
 
-[[package]]
-category = "main"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
-name = "importlib-metadata"
-optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.3.0"
-
-[package.dependencies]
-zipp = ">=0.5"
-
-[package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "importlib-resources"]
-
 [[package]]
 category = "dev"
 description = "Various helpers to pass data to untrusted environments and back."
@@ -222,28 +192,6 @@ optional = false
 python-versions = "*"
 version = "0.82"
 
-[[package]]
-category = "main"
-description = "An implementation of JSON Schema validation for Python"
-name = "jsonschema"
-optional = false
-python-versions = "*"
-version = "3.2.0"
-
-[package.dependencies]
-attrs = ">=17.4.0"
-pyrsistent = ">=0.14.0"
-setuptools = "*"
-six = ">=1.11.0"
-
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = "*"
-
-[package.extras]
-format = ["idna", "jsonpointer (>1.13)", "rfc3987", "strict-rfc3339", "webcolors"]
-format_nongpl = ["idna", "jsonpointer (>1.13)", "webcolors", "rfc3986-validator (>0.1.0)", "rfc3339-validator"]
-
 [[package]]
 category = "main"
 description = "Python logging made (stupidly) simple"
@@ -271,18 +219,6 @@ optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
 version = "1.1.1"
 
-[[package]]
-category = "main"
-description = "More routines for operating on iterables, beyond itertools"
-marker = "python_version < \"3.8\""
-name = "more-itertools"
-optional = false
-python-versions = "*"
-version = "5.0.0"
-
-[package.dependencies]
-six = ">=1.0.0,<2.0.0"
-
 [[package]]
 category = "main"
 description = "Data validation and settings management using python 3.6 type hinting"
@@ -301,17 +237,6 @@ dotenv = ["python-dotenv (>=0.10.4)"]
 email = ["email-validator (>=1.0.3)"]
 typing_extensions = ["typing-extensions (>=3.7.2)"]
 
-[[package]]
-category = "main"
-description = "Persistent/Functional/Immutable data structures"
-name = "pyrsistent"
-optional = false
-python-versions = "*"
-version = "0.15.6"
-
-[package.dependencies]
-six = "*"
-
 [[package]]
 category = "main"
 description = "YAML parser and emitter for Python"
@@ -349,14 +274,6 @@ version = "0.9.1"
 [package.dependencies]
 requests = ">=2.0.1,<3.0.0"
 
-[[package]]
-category = "main"
-description = "Python 2 and 3 compatibility utilities"
-name = "six"
-optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "1.13.0"
-
 [[package]]
 category = "dev"
 description = "The little ASGI library that shines."
@@ -438,24 +355,8 @@ version = "1.0.1"
 [package.extras]
 dev = ["pytest (>=4.6.2)", "black (>=19.3b0)"]
 
-[[package]]
-category = "main"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
-name = "zipp"
-optional = false
-python-versions = ">=2.7"
-version = "0.6.0"
-
-[package.dependencies]
-more-itertools = "*"
-
-[package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pathlib2", "contextlib2", "unittest2"]
-
 [metadata]
-content-hash = "8ef61f687de82f9bd0c92c521e2cc890454a4da6ca7f80d0f30973551540c4ae"
+content-hash = "ff30b34e5d7a0934029a6ea20ebd43fc9ea769c4bbb2e63890de6d399d756da0"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -463,10 +364,6 @@ aiocontextvars = [
     {file = "aiocontextvars-0.2.2-py2.py3-none-any.whl", hash = "sha256:885daf8261818767d8f7cbd79f9d4482d118f024b6586ef6e67980236a27bfa3"},
     {file = "aiocontextvars-0.2.2.tar.gz", hash = "sha256:f027372dc48641f683c559f247bd84962becaacdc9ba711d583c3871fb5652aa"},
 ]
-attrs = [
-    {file = "attrs-19.3.0-py2.py3-none-any.whl", hash = "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c"},
-    {file = "attrs-19.3.0.tar.gz", hash = "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"},
-]
 certifi = [
     {file = "certifi-2019.11.28-py2.py3-none-any.whl", hash = "sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3"},
     {file = "certifi-2019.11.28.tar.gz", hash = "sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f"},
@@ -580,10 +477,6 @@ immutables = [
     {file = "immutables-0.11-cp37-cp37m-win_amd64.whl", hash = "sha256:6b6d8d035e5888baad3db61dfb167476838a63afccecd927c365f228bb55754c"},
     {file = "immutables-0.11.tar.gz", hash = "sha256:d6850578a0dc6530ac19113cfe4ddc13903df635212d498f176fe601a8a5a4a3"},
 ]
-importlib-metadata = [
-    {file = "importlib_metadata-1.3.0-py2.py3-none-any.whl", hash = "sha256:d95141fbfa7ef2ec65cfd945e2af7e5a6ddbd7c8d9a25e66ff3be8e3daf9f60f"},
-    {file = "importlib_metadata-1.3.0.tar.gz", hash = "sha256:073a852570f92da5f744a3472af1b61e28e9f78ccf0c9117658dc32b15de7b45"},
-]
 itsdangerous = [
     {file = "itsdangerous-1.1.0-py2.py3-none-any.whl", hash = "sha256:b12271b2047cb23eeb98c8b5622e2e5c5e9abd9784a153e9d8ef9cb4dd09d749"},
     {file = "itsdangerous-1.1.0.tar.gz", hash = "sha256:321b033d07f2a4136d3ec762eac9f16a10ccd60f53c0c91af90217ace7ba1f19"},
@@ -595,10 +488,6 @@ jinja2 = [
 jsonpath = [
     {file = "jsonpath-0.82.tar.gz", hash = "sha256:46d3fd2016cd5b842283d547877a02c418a0fe9aa7a6b0ae344115a2c990fef4"},
 ]
-jsonschema = [
-    {file = "jsonschema-3.2.0-py2.py3-none-any.whl", hash = "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163"},
-    {file = "jsonschema-3.2.0.tar.gz", hash = "sha256:c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a"},
-]
 loguru = [
     {file = "loguru-0.4.1-py3-none-any.whl", hash = "sha256:074b3caa6748452c1e4f2b302093c94b65d5a4c5a4d7743636b4121e06437b0e"},
     {file = "loguru-0.4.1.tar.gz", hash = "sha256:a6101fd435ac89ba5205a105a26a6ede9e4ddbb4408a6e167852efca47806d11"},
@@ -633,11 +522,6 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win_amd64.whl", hash = "sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
-more-itertools = [
-    {file = "more-itertools-5.0.0.tar.gz", hash = "sha256:38a936c0a6d98a38bcc2d03fdaaedaba9f412879461dd2ceff8d37564d6522e4"},
-    {file = "more_itertools-5.0.0-py2-none-any.whl", hash = "sha256:c0a5785b1109a6bd7fac76d6837fd1feca158e54e521ccd2ae8bfe393cc9d4fc"},
-    {file = "more_itertools-5.0.0-py3-none-any.whl", hash = "sha256:fe7a7cae1ccb57d33952113ff4fa1bc5f879963600ed74918f1236e212ee50b9"},
-]
 pydantic = [
     {file = "pydantic-1.4-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:07911aab70f3bc52bb845ce1748569c5e70478ac977e106a150dd9d0465ebf04"},
     {file = "pydantic-1.4-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:012c422859bac2e03ab3151ea6624fecf0e249486be7eb8c6ee69c91740c6752"},
@@ -654,9 +538,6 @@ pydantic = [
     {file = "pydantic-1.4-py36.py37.py38-none-any.whl", hash = "sha256:72184c1421103cca128300120f8f1185fb42a9ea73a1c9845b1c53db8c026a7d"},
     {file = "pydantic-1.4.tar.gz", hash = "sha256:f17ec336e64d4583311249fb179528e9a2c27c8a2eaf590ec6ec2c6dece7cb3f"},
 ]
-pyrsistent = [
-    {file = "pyrsistent-0.15.6.tar.gz", hash = "sha256:f3b280d030afb652f79d67c5586157c5c1355c9a58dfc7940566e28d28f3df1b"},
-]
 pyyaml = [
     {file = "PyYAML-5.2-cp27-cp27m-win32.whl", hash = "sha256:35ace9b4147848cafac3db142795ee42deebe9d0dad885ce643928e88daebdcc"},
     {file = "PyYAML-5.2-cp27-cp27m-win_amd64.whl", hash = "sha256:ebc4ed52dcc93eeebeae5cf5deb2ae4347b3a81c3fa12b0b8c976544829396a4"},
@@ -678,10 +559,6 @@ requests-toolbelt = [
     {file = "requests-toolbelt-0.9.1.tar.gz", hash = "sha256:968089d4584ad4ad7c171454f0a5c6dac23971e9472521ea3b6d49d610aa6fc0"},
     {file = "requests_toolbelt-0.9.1-py2.py3-none-any.whl", hash = "sha256:380606e1d10dc85c3bd47bf5a6095f815ec007be7a8b69c878507068df059e6f"},
 ]
-six = [
-    {file = "six-1.13.0-py2.py3-none-any.whl", hash = "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd"},
-    {file = "six-1.13.0.tar.gz", hash = "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"},
-]
 starlette = [
     {file = "starlette-0.12.9.tar.gz", hash = "sha256:c2ac9a42e0e0328ad20fe444115ac5e3760c1ee2ac1ff8cdb5ec915c4a453411"},
 ]
@@ -725,7 +602,3 @@ win32-setctime = [
     {file = "win32_setctime-1.0.1-py3-none-any.whl", hash = "sha256:568fd636c68350bcc54755213fe01966fe0a6c90b386c0776425944a0382abef"},
     {file = "win32_setctime-1.0.1.tar.gz", hash = "sha256:b47e5023ec7f0b4962950902b15bc56464a380d869f59d27dbf9ab423b23e8f9"},
 ]
-zipp = [
-    {file = "zipp-0.6.0-py2.py3-none-any.whl", hash = "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"},
-    {file = "zipp-0.6.0.tar.gz", hash = "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e"},
-]
diff --git a/pyproject.toml b/pyproject.toml
index 0bdb58e0..93c568bb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "httprunner"
-version = "3.0.1"
+version = "3.0.2"
 description = "One-stop solution for HTTP(S) testing."
 license = "Apache-2.0"
 readme = "README.md"
@@ -36,7 +36,6 @@ jinja2 = "^2.10.3"
 har2case = "^0.3.1"
 filetype = "^1.0.5"
 jsonpath = "^0.82"
-jsonschema = "^3.2.0"
 pydantic = "^1.4"
 loguru = "^0.4.1"
 
diff --git a/tests/testcases/setup.json b/tests/testcases/setup.json
index bbc2d3ed..e837de59 100644
--- a/tests/testcases/setup.json
+++ b/tests/testcases/setup.json
@@ -24,9 +24,9 @@
                 "os_platform": "ios",
                 "user_agent": "iOS/10.3"
             },
-            "extract": [
-                {"session_token": "content.token"}
-            ],
+            "extract": {
+                "session_token": "content.token"
+            },
             "validate": [
                 {"eq": ["status_code", 200]},
                 {"len_eq": ["content.token", 16]}
diff --git a/tests/testcases/setup.yml b/tests/testcases/setup.yml
index d9945928..d2c011bc 100644
--- a/tests/testcases/setup.yml
+++ b/tests/testcases/setup.yml
@@ -21,7 +21,7 @@ teststeps:
         os_platform: 'ios'
         app_version: '2.8.6'
     extract:
-        - session_token: content.token
+        session_token: content.token
     validate:
         - eq: ["status_code", 200]
         - len_eq: ["content.token", 16]