diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
deleted file mode 100644
index 03aabfe9a..000000000
--- a/.github/workflows/coverage.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-
-name: coverage
-
-on: [ push, pull_request, workflow_dispatch ]
-
-jobs:
-  run:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-#         os: [ubuntu-latest, macos-latest, windows-latest]
-        os: [ubuntu-latest]
-        python-version: [3.6]
-    env:
-      OS: ${{ matrix.os }}
-      PYTHON: ${{ matrix.python-version }}
-    steps:
-    - uses: actions/checkout@master
-    - name: Setup Python
-      uses: actions/setup-python@master
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install build dependencies
-      run: | 
-        pip install -r maro/requirements.build.txt
-    - name: Compile cython files
-      run: |
-        cython ./maro/backends/backend.pyx ./maro/backends/np_backend.pyx ./maro/backends/raw_backend.pyx ./maro/backends/frame.pyx -3 -E FRAME_BACKEND=NUMPY,NODES_MEMORY_LAYOUT=ONE_BLOCK -X embedsignature=True
-    - name: Generate coverage report
-      run: |
-        pip install pytest
-        pip install pytest-cov
-        pip install -r ./tests/requirements.test.txt
-        PYTHONPATH=/home/runner/work/maro/maro pytest --cov=./ --cov-report=xml
-    - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v1
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        file: ./coverage.xml
-        files: ./coverage1.xml,./coverage2.xml
-        directory: ./coverage/reports/
-        flags: unittests
-        env_vars: OS,PYTHON
-        name: maro-code-coverage
-        fail_ci_if_error: true
-        path_to_write_report: ./coverage/codecov_report.gz
diff --git a/README.md b/README.md
index c02db6fb5..1d78d9539 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@
 [![Commits](https://img.shields.io/github/commits-since/microsoft/maro/latest/master)](https://github.com/microsoft/maro/commits/master)
 [![Quality](https://github.com/microsoft/maro/workflows/quality/badge.svg?branch=master)](https://github.com/microsoft/maro/actions?query=workflow%3Aquality)
 [![Lint](https://github.com/microsoft/maro/workflows/lint/badge.svg)](https://github.com/microsoft/maro/actions?query=workflow%3Alint)
+[![Coverage](https://img.shields.io/codecov/c/github/microsoft/maro)](https://codecov.io/gh/microsoft/maro)
 [![Downloads](https://img.shields.io/pypi/dm/pymaro)](https://pypi.org/project/pymaro/#files)
 [![Docker Pulls](https://img.shields.io/docker/pulls/arthursjiang/maro)](https://hub.docker.com/repository/docker/arthursjiang/maro)
 
diff --git a/tests/requirements.txt b/tests/requirements.txt
deleted file mode 100644
index 7ad9ad7a1..000000000
--- a/tests/requirements.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-matplotlib==3.1.2
-geopy
-pandas
-numpy==1.19.1
-pycurl
-holidays
-pyaml
-redis
-pyzmq
-influxdb
-requests
-psutil
-pychalk
-deepdiff
-azure-storage-blob
-azure-storage-common
-torch
-pytest
-coverage