diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..772b61d
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,20 @@
+version: 2
+
+jobs:
+  test:
+    docker:
+      - image: circleci/golang:1.13
+    steps:
+      - checkout
+      - run:
+          name: Run the testing
+          command: make test
+      - run:
+          name: Upload coverage data to Codecov
+          command: bash <(curl -s https://codecov.io/bash)
+
+workflows:
+  version: 2
+  commit-pipeline:
+    jobs:
+      - test
diff --git a/.gitignore b/.gitignore
index 3d38ba8..47bba13 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
-.coverprofile
-.coverprofile.html
+coverage.txt
+coverage.html
 
 # Created by https://www.gitignore.io/api/macos,windows,linux,vim,jetbrains
 # Edit at https://www.gitignore.io/?templates=macos,windows,linux,vim,jetbrains
diff --git a/Makefile b/Makefile
index 222e304..5131c5d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 .PHONY: test
 test:
-	go test -coverprofile .coverprofile -timeout 10m ./...
-	go tool cover -html .coverprofile -o .coverprofile.html
+	go test -race -coverprofile=coverage.txt -covermode=atomic -timeout=10m ./...
+	go tool cover -html coverage.txt -o coverage.html
 
 .PHONY: benchmark
 benchmark:
diff --git a/README.md b/README.md
index 765e7db..dd220b8 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Poker
 
-[![GoDoc](https://godoc.org/github.com/chehsunliu/poker?status.svg)](https://godoc.org/github.com/chehsunliu/poker)
+[![CircleCI](https://circleci.com/gh/chehsunliu/poker/tree/master.svg?style=shield&circle-token=abebd63b852ce8ecdcdf3f7e597be743d07402e4)](https://circleci.com/gh/chehsunliu/poker/tree/master) [![GoDoc](https://godoc.org/github.com/chehsunliu/poker?status.svg)](https://godoc.org/github.com/chehsunliu/poker) [![codecov](https://codecov.io/gh/chehsunliu/poker/branch/master/graph/badge.svg)](https://codecov.io/gh/chehsunliu/poker)
 
 Poker is ported from the Python library [worldveil/deuces](https://github.com/worldveil/deuces).