diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 93eba206..8a95a93d 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Release History
 
+## 3.0.12 (2020-06-14)
+
+**Fixed**
+
+- fix: compatibility with different path separators of Linux and Windows
+- fix: IndexError in ensure_file_path_valid when file_path=os.getcwd()
+- fix: ensure step referenced api, convert to v3 testcase
+- fix: several other compatibility issues
+
+**Changed**
+
+- change: skip reporting sentry for errors occurred in debugtalk.py
+
 ## 3.0.11 (2020-06-08)
 
 **Changed**
diff --git a/httprunner/__init__.py b/httprunner/__init__.py
index 61b95cf3..b082aed8 100644
--- a/httprunner/__init__.py
+++ b/httprunner/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "3.0.11"
+__version__ = "3.0.12"
 __description__ = "One-stop solution for HTTP(S) testing."
 
 from httprunner.runner import HttpRunner
diff --git a/httprunner/compat.py b/httprunner/compat.py
index 20c442f4..e899e3cc 100644
--- a/httprunner/compat.py
+++ b/httprunner/compat.py
@@ -47,6 +47,9 @@ def convert_variables(
 
 
 def convert_jmespath(raw: Text) -> Text:
+    if not isinstance(raw, Text):
+        raise exceptions.TestCaseFormatError(f"Invalid jmespath extractor: {raw}")
+
     # content.xx/json.xx => body.xx
     if raw.startswith("content"):
         raw = f"body{raw[len('content'):]}"
@@ -90,6 +93,9 @@ def convert_extractors(extractors: Union[List, Dict]) -> Dict:
     if isinstance(extractors, List):
         # [{"varA": "content.varA"}, {"varB": "json.varB"}]
         for extractor in extractors:
+            if not isinstance(extractor, Dict):
+                logger.error(f"Invalid extractor: {extractors}")
+                sys.exit(1)
             for k, v in extractor.items():
                 v3_extractors[k] = v
     elif isinstance(extractors, Dict):
@@ -348,3 +354,15 @@ def session_fixture(request):
         f.write(conftest_content)
 
     logger.info("generated conftest.py to generate summary.json")
+
+
+def ensure_path_sep(path: Text) -> Text:
+    """ ensure compatibility with different path separators of Linux and Windows
+    """
+    if "/" in path:
+        path = os.sep.join(path.split("/"))
+
+    if "\\" in path:
+        path = os.sep.join(path.split("\\"))
+
+    return path
diff --git a/httprunner/ext/har2case/__init__.py b/httprunner/ext/har2case/__init__.py
index 3e5c21c4..c1a074b4 100644
--- a/httprunner/ext/har2case/__init__.py
+++ b/httprunner/ext/har2case/__init__.py
@@ -14,6 +14,7 @@ import sys
 from loguru import logger
 from sentry_sdk import capture_message
 
+from httprunner.compat import ensure_path_sep
 from httprunner.ext.har2case.core import HarParser
 
 
@@ -59,6 +60,7 @@ def main_har2case(args):
         logger.error("HAR file not specified.")
         sys.exit(1)
 
+    har_source_file = ensure_path_sep(har_source_file)
     if not os.path.isfile(har_source_file):
         logger.error(f"HAR file not exists: {har_source_file}")
         sys.exit(1)
diff --git a/httprunner/loader.py b/httprunner/loader.py
index 9592e5bf..cc6799c0 100644
--- a/httprunner/loader.py
+++ b/httprunner/loader.py
@@ -370,7 +370,12 @@ def load_debugtalk_functions() -> Dict[Text, Callable]:
 
     """
     # load debugtalk.py module
-    imported_module = importlib.import_module("debugtalk")
+    try:
+        imported_module = importlib.import_module("debugtalk")
+    except Exception as ex:
+        logger.error(f"error occurred in debugtalk.py: {ex}")
+        sys.exit(1)
+
     # reload to refresh previously loaded module
     imported_module = importlib.reload(imported_module)
     return load_module_functions(imported_module)
diff --git a/httprunner/make.py b/httprunner/make.py
index 2e842213..55ee1070 100644
--- a/httprunner/make.py
+++ b/httprunner/make.py
@@ -13,6 +13,7 @@ from httprunner.compat import (
     ensure_testcase_v3_api,
     ensure_testcase_v3,
     convert_variables,
+    ensure_path_sep,
 )
 from httprunner.loader import (
     load_folder_files,
@@ -63,6 +64,7 @@ if __name__ == "__main__":
 
 
 def __ensure_absolute(path: Text) -> Text:
+    path = ensure_path_sep(path)
     project_meta = load_project_meta(path)
 
     if os.path.isabs(path):
@@ -148,6 +150,15 @@ def format_pytest_with_black(*python_paths: Text) -> NoReturn:
     except subprocess.CalledProcessError as ex:
         capture_exception(ex)
         logger.error(ex)
+        sys.exit(1)
+    except FileNotFoundError:
+        err_msg = """
+missing dependency tool: black
+install black manually and try again:
+$ pip install black
+"""
+        logger.error(err_msg)
+        sys.exit(1)
 
 
 def make_config_chain_style(config: Dict) -> Text:
@@ -324,6 +335,11 @@ def make_testcase(testcase: Dict, dir_path: Text = None) -> Text:
         # make ref testcase pytest file
         ref_testcase_path = __ensure_absolute(teststep["testcase"])
         test_content = load_test_file(ref_testcase_path)
+
+        # api in v2 format, convert to v3 testcase
+        if "request" in test_content and "name" in test_content:
+            test_content = ensure_testcase_v3_api(test_content)
+
         test_content.setdefault("config", {})["path"] = ref_testcase_path
         ref_testcase_python_path = make_testcase(test_content)
 
@@ -493,6 +509,7 @@ def main_make(tests_paths: List[Text]) -> List[Text]:
         return []
 
     for tests_path in tests_paths:
+        tests_path = ensure_path_sep(tests_path)
         if not os.path.isabs(tests_path):
             tests_path = os.path.join(os.getcwd(), tests_path)
 
diff --git a/httprunner/utils.py b/httprunner/utils.py
index 7ba3b147..48da026a 100644
--- a/httprunner/utils.py
+++ b/httprunner/utils.py
@@ -199,6 +199,9 @@ def ensure_file_path_valid(file_path: Text) -> Text:
     else:
         raw_file_relative_name = raw_file_name
 
+    if raw_file_relative_name == "":
+        return file_path
+
     path_names = []
     for name in raw_file_relative_name.rstrip(os.sep).split(os.sep):
 
diff --git a/pyproject.toml b/pyproject.toml
index 9eb460f6..e21f7182 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "httprunner"
-version = "3.0.11"
+version = "3.0.12"
 description = "One-stop solution for HTTP(S) testing."
 license = "Apache-2.0"
 readme = "README.md"
diff --git a/tests/compat_test.py b/tests/compat_test.py
index 49e78500..b5d45250 100644
--- a/tests/compat_test.py
+++ b/tests/compat_test.py
@@ -2,7 +2,7 @@ import os
 import unittest
 
 from httprunner import compat, exceptions, loader
-from httprunner.compat import convert_variables
+from httprunner.compat import convert_variables, ensure_path_sep
 
 
 class TestCompat(unittest.TestCase):
@@ -213,3 +213,19 @@ class TestCompat(unittest.TestCase):
                 "--self-contained-html",
             ],
         )
+
+    def test_ensure_file_path(self):
+        self.assertEqual(
+            ensure_path_sep("demo\\test.yml"), os.sep.join(["demo", "test.yml"])
+        )
+        self.assertEqual(
+            ensure_path_sep(os.path.join(os.getcwd(), "demo\\test.yml")),
+            os.path.join(os.getcwd(), os.sep.join(["demo", "test.yml"])),
+        )
+        self.assertEqual(
+            ensure_path_sep("demo/test.yml"), os.sep.join(["demo", "test.yml"])
+        )
+        self.assertEqual(
+            ensure_path_sep(os.path.join(os.getcwd(), "demo/test.yml")),
+            os.path.join(os.getcwd(), os.sep.join(["demo", "test.yml"])),
+        )
diff --git a/tests/ext/har2case/core_test.py b/tests/ext/har2case/core_test.py
index 21e818ad..f696e5c0 100644
--- a/tests/ext/har2case/core_test.py
+++ b/tests/ext/har2case/core_test.py
@@ -2,7 +2,7 @@ import os
 
 from httprunner.ext.har2case.core import HarParser
 from httprunner.ext.har2case.utils import load_har_log_entries
-from tests.ext.har2case.utils_test import TestHar2CaseUtils
+from tests.ext.har2case.har_utils_test import TestHar2CaseUtils
 
 
 class TestHar(TestHar2CaseUtils):
diff --git a/tests/ext/har2case/utils_test.py b/tests/ext/har2case/har_utils_test.py
similarity index 100%
rename from tests/ext/har2case/utils_test.py
rename to tests/ext/har2case/har_utils_test.py
diff --git a/tests/utils_test.py b/tests/utils_test.py
index d301587b..df213a54 100644
--- a/tests/utils_test.py
+++ b/tests/utils_test.py
@@ -122,6 +122,16 @@ class TestUtils(unittest.TestCase):
             ensure_file_path_valid("examples/postman_echo/request_methods/"),
             os.path.join(os.getcwd(), "examples/postman_echo/request_methods"),
         )
+        self.assertEqual(
+            ensure_file_path_valid(os.path.join(os.getcwd(), "test.yml")),
+            os.path.join(os.getcwd(), "test.yml"),
+        )
+        self.assertEqual(
+            ensure_file_path_valid(os.getcwd()), os.getcwd(),
+        )
+        self.assertEqual(
+            ensure_file_path_valid(os.getcwd() + ".csv"), os.getcwd() + ".csv",
+        )
 
     def test_safe_dump_json(self):
         class A(object):