diff --git a/.github/workflows/integration_test.yml b/.github/workflows/integration_test.yml
new file mode 100644
index 00000000..f9e8c5e5
--- /dev/null
+++ b/.github/workflows/integration_test.yml
@@ -0,0 +1,35 @@
+name: integration_test
+
+on: [push]
+
+jobs:
+  integration_test:
+
+    name: ${{ matrix.python-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      max-parallel: 6
+      matrix:
+        python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
+        os: [ubuntu-latest, macos-latest] # TODO: windows-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install poetry
+        poetry --version
+        poetry install -vv
+    - name: Test package installation
+      run: |
+        poetry build
+        ls dist/*.whl | xargs pip install # test installation
+        hrun -V
+    - name: Run smoketest for hrun command
+      run: |
+        cd tests/httpbin && hrun basic.yml --failfast && cd -
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
new file mode 100644
index 00000000..c8bc9558
--- /dev/null
+++ b/.github/workflows/unittest.yml
@@ -0,0 +1,47 @@
+name: unittest
+
+on: [push]
+
+jobs:
+  unittest:
+
+    name: ${{ matrix.python-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      max-parallel: 12
+      matrix:
+        python-version: [2.7, 3.5, 3.6, 3.7]  # TODO: 3.8
+        os: [ubuntu-latest, macos-latest] # TODO: windows-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install poetry
+        poetry --version
+        poetry install -vv
+    - name: Run unittest for httprunner
+      run: |
+        poetry run python -m httprunner.cli hrun -V
+        poetry run python -m httprunner.cli hrun -h
+        poetry run coverage run --source=httprunner -m unittest discover
+        poetry run coverage xml
+        poetry run coverage report -m
+    - name: Codecov
+      uses: codecov/codecov-action@v1.0.5
+      with:
+        # User defined upload name. Visible in Codecov UI
+        name: httprunner
+        # Repository upload token - get it from codecov.io
+        token: ${{ secrets.CODECOV_TOKEN }}
+        # Path to coverage file to upload
+        file: ./coverage.xml
+        # Flag upload to group coverage metrics (e.g. unittests | integration | ui,chrome)
+        flags: unittests
+        # Specify whether or not CI build should fail if Codecov runs into an error during upload
+        fail_ci_if_error: true
diff --git a/.gitignore b/.gitignore
index 55e509a6..56349609 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,4 +14,6 @@ logs
 locustfile.py
 site/
 reports
-.venv
\ No newline at end of file
+.venv
+*.xml
+htmlcov/
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index ca7c82ec..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-sudo: false
-language: python
-python:
-  - 2.7
-  - 3.5
-  - 3.6
-matrix:
-  include: # Required for Python 3.7+
-    - python: 3.7
-      dist: xenial
-    - python: 3.8
-      dist: xenial
-install:
-  - pip install poetry
-  - poetry install -vvv
-  - poetry build
-  - ls dist/*.whl | xargs pip install # test installation
-script:
-  - hrun -V
-  - cd tests/httpbin && hrun basic.yml --log-level debug --failfast && cd -
-  - python -m httprunner.cli hrun -V
-  - python -m httprunner.cli hrun -h
-  - poetry build
-  - poetry run coverage run --source=httprunner -m unittest discover
-after_success:
-  - poetry run coveralls
\ No newline at end of file
diff --git a/README.md b/README.md
index 433400e8..4bdbb75c 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,11 @@
 # HttpRunner
 
 [![downloads](https://pepy.tech/badge/httprunner)](https://pepy.tech/project/httprunner)
-[![travis-ci](https://travis-ci.org/httprunner/httprunner.svg?branch=master)](https://travis-ci.org/httprunner/httprunner)
-[![coveralls](https://coveralls.io/repos/github/HttpRunner/HttpRunner/badge.svg?branch=master)](https://coveralls.io/github/HttpRunner/HttpRunner?branch=master)
+[![unittest](https://github.com/httprunner/httprunner/workflows/unittest/badge.svg
+)](https://github.com/httprunner/httprunner/actions)
+[![integration-test](https://github.com/httprunner/httprunner/workflows/integration_test/badge.svg
+)](https://github.com/httprunner/httprunner/actions)
+[![codecov](https://codecov.io/gh/httprunner/httprunner/branch/master/graph/badge.svg)](https://codecov.io/gh/httprunner/httprunner)
 [![pypi version](https://img.shields.io/pypi/v/httprunner.svg)](https://pypi.python.org/pypi/httprunner)
 [![pyversions](https://img.shields.io/pypi/pyversions/httprunner.svg)](https://pypi.python.org/pypi/httprunner)
 [![TesterHome](https://img.shields.io/badge/TTF-TesterHome-2955C5.svg)](https://testerhome.com/github_statistics)
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index fe235dce..e9eb25c8 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Release History
 
+## 2.4.3 (2019-12-16)
+
+**Added**
+
+- feat: load api content on demand
+
+**Changed**
+
+- refactor: use poetry>=1.0.0
+- test: migrate from travis CI to github actions
+- test: migrate from coveralls to codecov
+- test: run matrix tests on linux/macos/~~windows~~ and Python 2.7/3.5/3.6/3.7/3.8
+
 ## 2.4.2 (2019-12-13)
 
 **Changed**
diff --git a/docs/Installation.md b/docs/Installation.md
index 9cbe45d0..dce2f93b 100644
--- a/docs/Installation.md
+++ b/docs/Installation.md
@@ -57,7 +57,7 @@ $ har2case -V
 
 如果你不仅仅是使用 HttpRunner，还需要对 HttpRunner 进行开发调试（debug），那么就需要进行如下操作。
 
-HttpRunner 使用 [poetry][poetry] 对依赖包进行管理，若你还没有安装 poetry，需要先执行如下命令进行按照：
+HttpRunner 使用 [poetry][poetry] 对依赖包进行管理，若你还没有安装 poetry，需要先执行如下命令进行安装：
 
 ```bash
 $ curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
@@ -83,29 +83,46 @@ $ poetry run python -m unittest discover
 
 查看 HttpRunner 的依赖情况：
 
-```text
-$ poetry show
-certifi           2019.9.11 Python package for providing Mozilla's CA Bundle.
-chardet           3.0.4     Universal encoding detector for Python 2 and 3
-click             7.0       Composable command line interface toolkit
-colorama          0.4.1     Cross-platform colored terminal text.
-colorlog          4.0.2     Log formatting with colors!
-coverage          4.5.4     Code coverage measurement for Python
-coveralls         1.8.2     Show coverage stats online via coveralls.io
-docopt            0.6.2     Pythonic argument parser, that will make you smile
-filetype          1.0.5     Infer file type and MIME type of any file/buffer. No external dependencies.
-flask             0.12.4    A microframework based on Werkzeug, Jinja2 and good intentions
-har2case          0.3.1     Convert HAR(HTTP Archive) to YAML/JSON testcases for HttpRunner.
-idna              2.8       Internationalized Domain Names in Applications (IDNA)
-itsdangerous      1.1.0     Various helpers to pass data to untrusted environments and back.
-jinja2            2.10.3    A very fast and expressive template engine.
-jsonpath          0.82      An XPath for JSON
-markupsafe        1.1.1     Safely add untrusted strings to HTML/XML markup.
-pyyaml            5.1.2     YAML parser and emitter for Python
-requests          2.22.0    Python HTTP for Humans.
-requests-toolbelt 0.9.1     A utility belt for advanced users of python-requests
-urllib3           1.25.6    HTTP library with thread-safe connection pooling, file post, and more.
-werkzeug          0.16.0    The comprehensive WSGI web application library.
+```bash
+$  poetry show --tree
+colorama 0.4.1 Cross-platform colored terminal text.
+colorlog 4.0.2 Log formatting with colors!
+└── colorama *
+coverage 4.5.4 Code coverage measurement for Python
+coveralls 1.8.2 Show coverage stats online via coveralls.io
+├── coverage >=3.6,<5.0
+├── docopt >=0.6.1
+├── requests >=1.0.0
+│   ├── certifi >=2017.4.17 
+│   ├── chardet >=3.0.2,<3.1.0 
+│   ├── idna >=2.5,<2.9 
+│   └── urllib3 >=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26 
+└── urllib3 *
+filetype 1.0.5 Infer file type and MIME type of any file/buffer. No external dependencies.
+flask 0.12.4 A microframework based on Werkzeug, Jinja2 and good intentions
+├── click >=2.0
+├── itsdangerous >=0.21
+├── jinja2 >=2.4
+│   └── markupsafe >=0.23 
+└── werkzeug >=0.7
+future 0.18.1 Clean single-source support for Python 3 and 2
+har2case 0.3.1 Convert HAR(HTTP Archive) to YAML/JSON testcases for HttpRunner.
+└── pyyaml *
+jinja2 2.10.3 A very fast and expressive template engine.
+└── markupsafe >=0.23
+jsonpath 0.82 An XPath for JSON
+pyyaml 5.1.2 YAML parser and emitter for Python
+requests 2.22.0 Python HTTP for Humans.
+├── certifi >=2017.4.17
+├── chardet >=3.0.2,<3.1.0
+├── idna >=2.5,<2.9
+└── urllib3 >=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26
+requests-toolbelt 0.9.1 A utility belt for advanced users of python-requests
+└── requests >=2.0.1,<3.0.0
+    ├── certifi >=2017.4.17 
+    ├── chardet >=3.0.2,<3.1.0 
+    ├── idna >=2.5,<2.9 
+    └── urllib3 >=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26 
 ```
 
 调试运行方式：
diff --git a/httprunner/__init__.py b/httprunner/__init__.py
index 8be0e197..ecce350e 100644
--- a/httprunner/__init__.py
+++ b/httprunner/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "2.4.2"
+__version__ = "2.4.3"
 __description__ = "One-stop solution for HTTP(S) testing."
 
 __all__ = ["__version__", "__description__"]
diff --git a/httprunner/loader/buildup.py b/httprunner/loader/buildup.py
index d0c6a642..e92739ea 100644
--- a/httprunner/loader/buildup.py
+++ b/httprunner/loader/buildup.py
@@ -2,7 +2,7 @@ import importlib
 import os
 
 from httprunner import exceptions, logger, utils
-from httprunner.loader.load import load_module_functions, load_folder_content, load_file, load_dot_env_file, \
+from httprunner.loader.load import load_module_functions, load_file, load_dot_env_file, \
     load_folder_files
 from httprunner.loader.locate import init_project_working_directory, get_project_working_directory
 
@@ -49,12 +49,16 @@ def __extend_with_api_ref(raw_testinfo):
             # type 1: api is defined in individual file
             api_name = api_path
 
-    try:
+    if api_name in tests_def_mapping["api"]:
         block = tests_def_mapping["api"][api_name]
-        # NOTICE: avoid project_mapping been changed during iteration.
-        raw_testinfo["api_def"] = utils.deepcopy_dict(block)
-    except KeyError:
+    elif not os.path.isfile(api_name):
         raise exceptions.ApiNotFound("{} not found!".format(api_name))
+    else:
+        block = load_file(api_name)
+
+    # NOTICE: avoid project_mapping been changed during iteration.
+    raw_testinfo["api_def"] = utils.deepcopy_dict(block)
+    tests_def_mapping["api"][api_name] = block
 
 
 def __extend_with_testcase_ref(raw_testinfo):
@@ -376,77 +380,6 @@ def load_test_file(path):
     return loaded_content
 
 
-def load_api_folder(api_folder_path):
-    """ load api definitions from api folder.
-
-    Args:
-        api_folder_path (str): api files folder.
-
-            api file should be in the following format:
-            [
-                {
-                    "api": {
-                        "def": "api_login",
-                        "request": {},
-                        "validate": []
-                    }
-                },
-                {
-                    "api": {
-                        "def": "api_logout",
-                        "request": {},
-                        "validate": []
-                    }
-                }
-            ]
-
-    Returns:
-        dict: api definition mapping.
-
-            {
-                "api_login": {
-                    "function_meta": {"func_name": "api_login", "args": [], "kwargs": {}}
-                    "request": {}
-                },
-                "api_logout": {
-                    "function_meta": {"func_name": "api_logout", "args": [], "kwargs": {}}
-                    "request": {}
-                }
-            }
-
-    """
-    api_definition_mapping = {}
-
-    api_items_mapping = load_folder_content(api_folder_path)
-
-    for api_file_path, api_items in api_items_mapping.items():
-        # TODO: add JSON schema validation
-        if isinstance(api_items, list):
-            for api_item in api_items:
-                key, api_dict = api_item.popitem()
-                api_id = api_dict.get("id") or api_dict.get("def") \
-                         or api_dict.get("name")
-                if key != "api" or not api_id:
-                    raise exceptions.ParamsError(
-                        "Invalid API defined in {}".format(api_file_path))
-
-                if api_id in api_definition_mapping:
-                    raise exceptions.ParamsError(
-                        "Duplicated API ({}) defined in {}".format(
-                            api_id, api_file_path))
-                else:
-                    api_definition_mapping[api_id] = api_dict
-
-        elif isinstance(api_items, dict):
-            if api_file_path in api_definition_mapping:
-                raise exceptions.ParamsError(
-                    "Duplicated API defined: {}".format(api_file_path))
-            else:
-                api_definition_mapping[api_file_path] = api_items
-
-    return api_definition_mapping
-
-
 def load_project_data(test_path, dot_env_path=None):
     """ load api, testcases, .env, debugtalk.py functions.
         api/testcases folder is relative to project_working_directory
@@ -482,9 +415,6 @@ def load_project_data(test_path, dot_env_path=None):
     project_mapping["functions"] = debugtalk_functions
     project_mapping["test_path"] = os.path.abspath(test_path)
 
-    # load api
-    tests_def_mapping["api"] = load_api_folder(os.path.join(project_working_directory, "api"))
-
     return project_mapping
 
 
diff --git a/httprunner/loader/load.py b/httprunner/loader/load.py
index 1fac6599..3b783856 100644
--- a/httprunner/loader/load.py
+++ b/httprunner/loader/load.py
@@ -185,31 +185,6 @@ def load_dot_env_file(dot_env_path):
     return env_variables_mapping
 
 
-def load_folder_content(folder_path):
-    """ load api/testcases/testsuites definitions from folder.
-
-    Args:
-        folder_path (str): api/testcases/testsuites files folder.
-
-    Returns:
-        dict: api definition mapping.
-
-            {
-                "tests/api/basic.yml": [
-                    {"api": {"def": "api_login", "request": {}, "validate": []}},
-                    {"api": {"def": "api_logout", "request": {}, "validate": []}}
-                ]
-            }
-
-    """
-    items_mapping = {}
-
-    for file_path in load_folder_files(folder_path):
-        items_mapping[file_path] = load_file(file_path)
-
-    return items_mapping
-
-
 def load_module_functions(module):
     """ load python module functions.
 
diff --git a/poetry.lock b/poetry.lock
index e121326e..1f0d0e58 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -4,7 +4,7 @@ description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
 optional = false
 python-versions = "*"
-version = "2019.9.11"
+version = "2019.11.28"
 
 [[package]]
 category = "main"
@@ -27,8 +27,8 @@ category = "main"
 description = "Cross-platform colored terminal text."
 name = "colorama"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.4.1"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.4.3"
 
 [[package]]
 category = "main"
@@ -49,31 +49,6 @@ optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, <4"
 version = "4.5.4"
 
-[[package]]
-category = "dev"
-description = "Show coverage stats online via coveralls.io"
-name = "coveralls"
-optional = false
-python-versions = "*"
-version = "1.8.2"
-
-[package.dependencies]
-coverage = ">=3.6,<5.0"
-docopt = ">=0.6.1"
-requests = ">=1.0.0"
-
-[package.dependencies.urllib3]
-python = "<3"
-version = "*"
-
-[[package]]
-category = "dev"
-description = "Pythonic argument parser, that will make you smile"
-name = "docopt"
-optional = false
-python-versions = "*"
-version = "0.6.2"
-
 [[package]]
 category = "main"
 description = "Infer file type and MIME type of any file/buffer. No external dependencies."
@@ -103,7 +78,7 @@ marker = "python_version >= \"2.7\" and python_version < \"2.8\""
 name = "future"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "0.18.1"
+version = "0.18.2"
 
 [[package]]
 category = "main"
@@ -143,6 +118,9 @@ version = "2.10.3"
 [package.dependencies]
 MarkupSafe = ">=0.23"
 
+[package.extras]
+i18n = ["Babel (>=0.8)"]
+
 [[package]]
 category = "main"
 description = "An XPath for JSON"
@@ -165,7 +143,7 @@ description = "YAML parser and emitter for Python"
 name = "pyyaml"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "5.1.2"
+version = "5.2"
 
 [[package]]
 category = "main"
@@ -181,6 +159,10 @@ chardet = ">=3.0.2,<3.1.0"
 idna = ">=2.5,<2.9"
 urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+
 [[package]]
 category = "main"
 description = "A utility belt for advanced users of python-requests"
@@ -198,7 +180,12 @@ description = "HTTP library with thread-safe connection pooling, file post, and
 name = "urllib3"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4"
-version = "1.25.6"
+version = "1.25.7"
+
+[package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
+secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
 
 [[package]]
 category = "dev"
@@ -208,30 +195,156 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "0.16.0"
 
+[package.extras]
+dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinx-issues"]
+termcolor = ["termcolor"]
+watchdog = ["watchdog"]
+
 [metadata]
-content-hash = "836d6dec466dfbf8a14481ed801c053a902b3fa6d8b75cf4f5aba4539c0899af"
+content-hash = "8963771b32271f9cfbec299fdccfd46f8847a4817c1d2083ca451ccff81646cb"
 python-versions = "~2.7 || ^3.5"
 
-[metadata.hashes]
-certifi = ["e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50", "fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef"]
-chardet = ["84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae", "fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"]
-click = ["2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13", "5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"]
-colorama = ["05eed71e2e327246ad6b38c540c4a3117230b19679b875190486ddd2d721422d", "f8ac84de7840f5b9c4e3347b3c1eaa50f7e49c2b07596221daec5edaabbd7c48"]
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+]
+werkzeug = [
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+    {file = "Werkzeug-0.16.0.tar.gz", hash = "sha256:7280924747b5733b246fe23972186c6b348f9ae29724135a6dfc1e53cea433e7"},
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diff --git a/pyproject.toml b/pyproject.toml
index 3bbc6e33..07a071f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "httprunner"
-version = "2.4.2"
+version = "2.4.3"
 description = "One-stop solution for HTTP(S) testing."
 license = "Apache-2.0"
 readme = "README.md"
@@ -45,7 +45,6 @@ future = { version = "^0.18.1", python = "~2.7" }
 [tool.poetry.dev-dependencies]
 flask = "<1.0.0"
 coverage = "^4.5.4"
-coveralls = "^1.8.2"
 
 [tool.poetry.scripts]
 hrun = "httprunner.cli:main"
@@ -54,5 +53,5 @@ httprunner = "httprunner.cli:main"
 locusts = "httprunner.plugins.locusts.cli:main"
 
 [build-system]
-requires = ["poetry>=0.12"]
+requires = ["poetry>=1.0.0"]
 build-backend = "poetry.masonry.api"
diff --git a/tests/api_server.py b/tests/api_server.py
index 4cf6b0fb..6919b274 100644
--- a/tests/api_server.py
+++ b/tests/api_server.py
@@ -93,6 +93,7 @@ def validate_request(func):
 def index():
     return "Hello World!"
 
+
 @app.route('/api/get-token', methods=['POST'])
 def get_token():
     device_sn = request.headers.get('device_sn', "")
@@ -121,6 +122,7 @@ def get_token():
     response.headers["Content-Type"] = "application/json"
     return response
 
+
 @app.route('/api/users')
 @validate_request
 def get_users():
@@ -134,6 +136,7 @@ def get_users():
     response.headers["Content-Type"] = "application/json"
     return response
 
+
 @app.route('/api/reset-all')
 @validate_request
 def clear_users():
@@ -145,6 +148,7 @@ def clear_users():
     response.headers["Content-Type"] = "application/json"
     return response
 
+
 @app.route('/api/users/<int:uid>', methods=['POST'])
 @validate_request
 def create_user(uid):
@@ -167,6 +171,7 @@ def create_user(uid):
     response.headers["Content-Type"] = "application/json"
     return response
 
+
 @app.route('/api/users/<int:uid>')
 @validate_request
 def get_user(uid):
@@ -188,6 +193,7 @@ def get_user(uid):
     response.headers["Content-Type"] = "application/json"
     return response
 
+
 @app.route('/api/users/<int:uid>', methods=['PUT'])
 @validate_request
 def update_user(uid):
@@ -209,6 +215,7 @@ def update_user(uid):
     response.headers["Content-Type"] = "application/json"
     return response
 
+
 @app.route('/api/users/<int:uid>', methods=['DELETE'])
 @validate_request
 def delete_user(uid):
diff --git a/tests/base.py b/tests/base.py
index 9e1e09b2..86da90fb 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -33,7 +33,7 @@ class ApiServerUnittest(unittest.TestCase):
         )
         cls.flask_process.start()
         cls.httpbin_process.start()
-        time.sleep(0.1)
+        time.sleep(1)
         cls.api_client = requests.Session()
 
     @classmethod
diff --git a/tests/test_loader/test_cases.py b/tests/test_loader/test_cases.py
index 7bea02a6..f501a3d0 100644
--- a/tests/test_loader/test_cases.py
+++ b/tests/test_loader/test_cases.py
@@ -277,13 +277,6 @@ class TestSuiteLoader(unittest.TestCase):
         with self.assertRaises(exceptions.FileNotFound):
             loader.load_cases(path)
 
-    def test_load_api_folder(self):
-        path = os.path.join(os.getcwd(), "tests", "api")
-        api_definition_mapping = buildup.load_api_folder(path)
-        api_file_path = os.path.join(os.getcwd(), "tests", "api", "get_token.yml")
-        self.assertIn(api_file_path, api_definition_mapping)
-        self.assertIn("request", api_definition_mapping[api_file_path])
-
     def test_load_project_tests(self):
         buildup.load_project_data(os.path.join(os.getcwd(), "tests"))
         api_file_path = os.path.join(os.getcwd(), "tests", "api", "get_token.yml")
diff --git a/tests/test_loader/test_load.py b/tests/test_loader/test_load.py
index a98493f7..b394032e 100644
--- a/tests/test_loader/test_load.py
+++ b/tests/test_loader/test_load.py
@@ -150,10 +150,3 @@ class TestFileLoader(unittest.TestCase):
         )
         env_variables_mapping = load.load_dot_env_file(dot_env_path)
         self.assertEqual(env_variables_mapping, {})
-
-    def test_load_folder_content(self):
-        path = os.path.join(os.getcwd(), "tests", "api")
-        items_mapping = load.load_folder_content(path)
-        file_path = os.path.join(os.getcwd(), "tests", "api", "reset_all.yml")
-        self.assertIn(file_path, items_mapping)
-        self.assertIsInstance(items_mapping[file_path], dict)