diff --git a/.github/workflows/py-tests.yml b/.github/workflows/py-tests.yml
new file mode 100644
index 000000000..e37cab3d8
--- /dev/null
+++ b/.github/workflows/py-tests.yml
@@ -0,0 +1,53 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Python API Tests
+
+on:
+  push:
+    branches:
+      - dev
+    paths:
+      - 'dolphinscheduler-python/**'
+  pull_request:
+    paths:
+      - 'dolphinscheduler-python/**'
+
+defaults:
+  run:
+    working-directory: dolphinscheduler-python/pydolphinscheduler
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9]
+        os: [ubuntu-18.04, macOS-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies & pydolphinscheduler
+        run: |
+          pip install -r requirements.txt -r requirements_dev.txt
+          pip install -e .
+      - name: Run tests
+        run: |
+          pytest
diff --git a/dolphinscheduler-python/pydolphinscheduler/README.md b/dolphinscheduler-python/pydolphinscheduler/README.md
index a98748336..a6609844e 100644
--- a/dolphinscheduler-python/pydolphinscheduler/README.md
+++ b/dolphinscheduler-python/pydolphinscheduler/README.md
@@ -19,6 +19,8 @@
 
 # pydolphinscheduler
 
+[![GitHub Build][ga-py-test]][ga]
+
 pydolphinscheduler is python API for Apache DolphinScheduler, which allow you definition
 your workflow by python code, aka workflow-as-codes.
 
@@ -47,7 +49,7 @@ section "DolphinScheduler Standalone Quick Start" to set up developer environmen
 and frontend server in this step, which mean that you could view DolphinScheduler UI in your browser with URL
 http://localhost:12345/dolphinscheduler
 
-After backend server is being start, all requests from `pydolphinscheduler` would be sends to backend server.
+After backend server is being start, all requests from `pydolphinscheduler` would be sent to backend server.
 And for now we could run a simple example by:
 
 ```shell
@@ -78,7 +80,7 @@ just open directory `dolphinscheduler-python/pydolphinscheduler` instead of `dol
 ### Brief Concept
 
 Apache DolphinScheduler is design to define workflow by UI, and pydolphinscheduler try to define it by code. When
-define by code, user usually do not care user, tanant, or queue exists or not. All user care about is create
+define by code, user usually do not care user, tenant, or queue exists or not. All user care about is created
 a new workflow by the code his/her definition. So we have some **side object** in `pydolphinscheduler/side`
 directory, their only check object exists or not, and create them if not exists. 
 
@@ -91,9 +93,20 @@ other word for more simple).
 
 pydolphinscheduler tasks object, we use tasks to define exact job we want DolphinScheduler do for us. For now,
 we only support `shell` task to execute shell task. [This link][all-task] list all tasks support in DolphinScheduler
-and would be implement in the further.
+and would be implemented in the further.
 
+### Testing
 
+pydolphinscheduler using [pytest][pytest] to test our codebase. GitHub Action will run our test when you create
+pull request or commit to dev branch, with python version `3.6|3.7|3.8|3.9` and operating system `linux|macOS|windows`.
+
+To test locally, you could directly run pytest after set `PYTHONPATH` 
+
+```shell
+PYTHONPATH=src/ pytest
+```
+
+<!-- content -->
 [pypi]: https://pypi.org/
 [dev-setup]: https://dolphinscheduler.apache.org/en-us/development/development-environment-setup.html
 [ui-project]: http://8.142.34.29:12345/dolphinscheduler/ui/#/projects/list
@@ -101,3 +114,7 @@ and would be implement in the further.
 [pycharm]: https://www.jetbrains.com/pycharm
 [idea]: https://www.jetbrains.com/idea/
 [all-task]: https://dolphinscheduler.apache.org/en-us/docs/dev/user_doc/guide/task/shell.html
+[pytest]: https://docs.pytest.org/en/latest/
+<!-- badge -->
+[ga-py-test]: https://github.com/apache/dolphinscheduler/actions/workflows/py-tests.yml/badge.svg?branch=dev
+[ga]: https://github.com/apache/dolphinscheduler/actions
diff --git a/dolphinscheduler-python/pydolphinscheduler/pytest.ini b/dolphinscheduler-python/pydolphinscheduler/pytest.ini
new file mode 100644
index 000000000..f2c7ae648
--- /dev/null
+++ b/dolphinscheduler-python/pydolphinscheduler/pytest.ini
@@ -0,0 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[pytest]
+# Do not test test_java_gateway.py due to we can not mock java gateway for now
+addopts = --ignore=tests/test_java_gateway.py
+
+# add path here to skip pytest scan it
+norecursedirs =
+    tests/testing
diff --git a/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py b/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py
index fa97c76b6..51ad74bed 100644
--- a/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py
+++ b/dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/core/task.py
@@ -151,10 +151,7 @@ class Task(Base):
 
     @property
     def process_definition(self) -> Optional[ProcessDefinition]:
-        if self._process_definition:
-            return self._process_definition
-        else:
-            raise ValueError(f'Task {self} has not been assigned to a ProcessDefinition yet')
+        return self._process_definition
 
     @process_definition.setter
     def process_definition(self, process_definition: Optional[ProcessDefinition]):
diff --git a/dolphinscheduler-python/pydolphinscheduler/src/__init__.py b/dolphinscheduler-python/pydolphinscheduler/tests/__init__.py
similarity index 100%
rename from dolphinscheduler-python/pydolphinscheduler/src/__init__.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/__init__.py
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/__init__.py b/dolphinscheduler-python/pydolphinscheduler/tests/core/__init__.py
similarity index 100%
rename from dolphinscheduler-python/pydolphinscheduler/test/__init__.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/core/__init__.py
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/core/test_process_definition.py b/dolphinscheduler-python/pydolphinscheduler/tests/core/test_process_definition.py
similarity index 98%
rename from dolphinscheduler-python/pydolphinscheduler/test/core/test_process_definition.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/core/test_process_definition.py
index 7155447d6..83a4c2b96 100644
--- a/dolphinscheduler-python/pydolphinscheduler/test/core/test_process_definition.py
+++ b/dolphinscheduler-python/pydolphinscheduler/tests/core/test_process_definition.py
@@ -19,8 +19,9 @@ import pytest
 
 from pydolphinscheduler.constants import ProcessDefinitionDefault, ProcessDefinitionReleaseState
 from pydolphinscheduler.core.process_definition import ProcessDefinition
-from pydolphinscheduler.core.task import Task, TaskParams
+from pydolphinscheduler.core.task import TaskParams
 from pydolphinscheduler.side import Tenant, Project, User
+from tests.testing.task import Task
 
 TEST_PROCESS_DEFINITION_NAME = "simple-test-process-definition"
 
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/core/test_task.py b/dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py
similarity index 93%
rename from dolphinscheduler-python/pydolphinscheduler/test/core/test_task.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py
index 1d89b0778..6e0342806 100644
--- a/dolphinscheduler-python/pydolphinscheduler/test/core/test_task.py
+++ b/dolphinscheduler-python/pydolphinscheduler/tests/core/test_task.py
@@ -52,14 +52,15 @@ def test_task_relation_to_dict():
 
 
 def test_task_to_dict():
-    code = "123"
+    code = 123
+    version = 1
     name = "test_task_to_dict"
     task_type = "test_task_to_dict_type"
     raw_script = "test_task_params_to_dict"
     expect = {
         "code": code,
         "name": name,
-        "version": 1,
+        "version": version,
         "description": None,
         "delayTime": 0,
         "taskType": task_type,
@@ -80,14 +81,14 @@ def test_task_to_dict():
         },
         "flag": "YES",
         "taskPriority": "MEDIUM",
-        "workerGroup": "worker-group-pydolphin",
+        "workerGroup": "default",
         "failRetryTimes": 0,
         "failRetryInterval": 1,
         "timeoutFlag": "CLOSE",
         "timeoutNotifyStrategy": None,
         "timeout": 0
     }
-    with patch('pydolphinscheduler.core.task.Task.gen_code', return_value=code):
+    with patch('pydolphinscheduler.core.task.Task.gen_code_and_version', return_value=(code, version)):
         task = Task(
             name=name,
             task_type=task_type,
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/core/__init__.py b/dolphinscheduler-python/pydolphinscheduler/tests/tasks/__init__.py
similarity index 100%
rename from dolphinscheduler-python/pydolphinscheduler/test/core/__init__.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/tasks/__init__.py
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/tasks/test_shell.py b/dolphinscheduler-python/pydolphinscheduler/tests/tasks/test_shell.py
similarity index 91%
rename from dolphinscheduler-python/pydolphinscheduler/test/tasks/test_shell.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/tasks/test_shell.py
index ff1b7b546..91cc431ff 100644
--- a/dolphinscheduler-python/pydolphinscheduler/test/tasks/test_shell.py
+++ b/dolphinscheduler-python/pydolphinscheduler/tests/tasks/test_shell.py
@@ -22,7 +22,8 @@ from pydolphinscheduler.tasks.shell import Shell
 
 
 def test_shell_to_dict():
-    code = "123"
+    code = 123
+    version = 1
     name = "test_shell_to_dict"
     command = "echo test shell"
     expect = {
@@ -49,13 +50,13 @@ def test_shell_to_dict():
         },
         "flag": "YES",
         "taskPriority": "MEDIUM",
-        "workerGroup": "worker-group-pydolphin",
+        "workerGroup": "default",
         "failRetryTimes": 0,
         "failRetryInterval": 1,
         "timeoutFlag": "CLOSE",
         "timeoutNotifyStrategy": None,
         "timeout": 0
     }
-    with patch('pydolphinscheduler.core.task.Task.gen_code', return_value=code):
+    with patch('pydolphinscheduler.core.task.Task.gen_code_and_version', return_value=(code, version)):
         shell = Shell(name, command)
         assert shell.to_dict() == expect
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/test_java_gateway.py b/dolphinscheduler-python/pydolphinscheduler/tests/test_java_gateway.py
similarity index 100%
rename from dolphinscheduler-python/pydolphinscheduler/test/test_java_gateway.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/test_java_gateway.py
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/example/__init__.py b/dolphinscheduler-python/pydolphinscheduler/tests/testing/__init__.py
similarity index 100%
rename from dolphinscheduler-python/pydolphinscheduler/test/example/__init__.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/testing/__init__.py
diff --git a/dolphinscheduler-python/pydolphinscheduler/test/tasks/__init__.py b/dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py
similarity index 78%
rename from dolphinscheduler-python/pydolphinscheduler/test/tasks/__init__.py
rename to dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py
index 13a83393a..32d3ffaf7 100644
--- a/dolphinscheduler-python/pydolphinscheduler/test/tasks/__init__.py
+++ b/dolphinscheduler-python/pydolphinscheduler/tests/testing/task.py
@@ -14,3 +14,14 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+
+import uuid
+
+from pydolphinscheduler.core.task import Task as SourceTask
+
+
+class Task(SourceTask):
+    DEFAULT_VERSION = 1
+
+    def gen_code_and_version(self):
+        return uuid.uuid1().time, self.DEFAULT_VERSION