diff --git a/.github/workflows/coverage_test.yml b/.github/workflows/coverage_test.yml
new file mode 100644
index 0000000..55304c4
--- /dev/null
+++ b/.github/workflows/coverage_test.yml
@@ -0,0 +1,68 @@
+name: coverage-test
+on: ["push", "pull_request"]
+
+jobs:
+  build:
+    name: coverage-test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone postgres repository
+        uses: actions/checkout@v2
+        with:
+          repository: 'postgres/postgres'
+          ref: 'REL_13_STABLE'
+
+      - name: Clone pg_stat_monitor repository
+        uses: actions/checkout@v2
+        with:
+          path: 'src/pg_stat_monitor'
+          ref: 'master'
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt purge postgresql-client-common postgresql-common postgresql postgresql*
+          sudo apt-get install libreadline6-dev systemtap-sdt-dev zlib1g-dev libssl-dev libpam0g-dev python-dev bison flex libipc-run-perl git lcov -y
+          sudo rm -rf /var/lib/postgresql/
+          sudo rm -rf /var/log/postgresql/
+          sudo rm -rf /etc/postgresql/
+          sudo rm -rf /usr/lib/postgresql
+          sudo rm -rf /usr/include/postgresql
+          sudo rm -rf /usr/share/postgresql
+          sudo rm -rf /etc/postgresql
+          sudo rm -f /usr/bin/pg_config
+      - name: Create pgsql dir
+        run: mkdir -p /opt/pgsql
+
+      - name: Build postgres
+        run: |
+          export PATH="/opt/pgsql/bin:$PATH"
+          ./configure --enable-coverage --enable-tap-tests --prefix=/opt/pgsql
+           make
+           make install
+      - name: Start postgresql cluster
+        run: |
+          export PATH="/opt/pgsql/bin:$PATH"
+          /opt/pgsql/bin/initdb -D /opt/pgsql/data
+          /opt/pgsql/bin/pg_ctl -D /opt/pgsql/data -l logfile start
+      - name: Build pg_stat_monitor
+        run: |
+          export PATH="/opt/pgsql/bin:$PATH"
+          sudo cp /opt/pgsql/bin/pg_config /usr/bin
+          make USE_PGXS=1
+          make USE_PGXS=1 install 
+        working-directory: src/pg_stat_monitor/
+
+      - name: Start pg_stat_monitor_tests & Run code coverage 
+        run: |
+          /opt/pgsql/bin/pg_ctl -D /opt/pgsql/data -l logfile stop
+          echo "shared_preload_libraries = 'pg_stat_monitor'" >> /opt/pgsql/data/postgresql.conf
+          /opt/pgsql/bin/pg_ctl -D /opt/pgsql/data -l logfile start
+          make installcheck
+          make coverage-html
+          lcov --capture --directory . --output-file coverage/lcov.info
+          pip install cpp-coveralls
+          export COVERALLS_REPO_TOKEN="${{ secrets.COVERALL_PG_STAT_MONITOR_TOKEN }}"
+          coveralls --verbose
+        working-directory: src/pg_stat_monitor/
+
diff --git a/README.md b/README.md
index 1e8d8e7..263ea19 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 ![pg13-test](https://github.com/percona/pg_stat_monitor/workflows/pg13-test/badge.svg)
 ![pg14-test](https://github.com/percona/pg_stat_monitor/workflows/pg14-test/badge.svg)
 
+[![Coverage Status](https://coveralls.io/repos/github/percona/pg_stat_monitor/badge.svg)](https://coveralls.io/github/percona/pg_stat_monitor)
+
 ## What is pg_stat_monitor?
 
 The **pg_stat_monitor** is a **Query Performance Monitoring** tool for [Percona Distribution for PostgreSQL](https://www.percona.com/software/postgresql-distribution) and PostgreSQL. **pg_stat_monitor** is based on PostgreSQL's contrib module ``pg_stat_statements``. pg_stat_statements provides the basic statistics, which is sometimes not enough. The major shortcoming in pg_stat_statements is that it accumulates all the queries and their statistics and does not provide aggregated statistics nor histogram information. In this case, a user needs to calculate the aggregate which is quite expensive.