diff --git a/.gitignore b/.gitignore
index ddfb15a8ab..08008893fb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@ data/
 # ginkgo test coverage
 *.coverprofile
 
+coverage.txt
+
 # retool. We could check this in like a vendor
 # But it is just tools that can be installed with make setup
 /_tools/
diff --git a/Makefile b/Makefile
index 19fbbbc2d7..9f4d14928c 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ GOENV  := GO15VENDOREXPERIMENT="1" CGO_ENABLED=0 GOOS=linux GOARCH=amd64
 GO     := $(GOENV) GO111MODULE=on go build -mod=vendor
 GOTEST := CGO_ENABLED=0 GO111MODULE=on go test -v -mod=vendor -cover
 
-LDFLAGS = $(shell ./hack/version.sh) 
+LDFLAGS = $(shell ./hack/version.sh)
 
 DOCKER_REGISTRY := $(if $(DOCKER_REGISTRY),$(DOCKER_REGISTRY),localhost:5000)
 
@@ -55,7 +55,7 @@ e2e-build:
 
 test:
 	@echo "Run unit tests"
-	@$(GOTEST) ./pkg/... && echo "\nUnit tests run successfully!"
+	@$(GOTEST) ./pkg/... -coverprofile=coverage.txt -covermode=atomic && echo "\nUnit tests run successfully!"
 
 check-all: lint check-static check-shadow check-gosec megacheck errcheck
 
diff --git a/README.md b/README.md
index d7d2718f84..7bc434536d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # TiDB Operator
 
 [![Build Status](https://internal.pingcap.net/jenkins/job/build_tidb_operator_master/badge/icon)](https://internal.pingcap.net/jenkins/job/build_tidb_operator_master)
+[![codecov](https://codecov.io/gh/pingcap/tidb-operator/branch/master/graph/badge.svg)](https://codecov.io/gh/pingcap/tidb-operator)
 
 TiDB Operator manages [TiDB](https://github.com/pingcap/tidb) clusters on [Kubernetes](https://kubernetes.io) and automates tasks related to operating a TiDB cluster. It makes TiDB a truly cloud-native database.
 
diff --git a/ci/pingcap_tidb_operator_build_dind.groovy b/ci/pingcap_tidb_operator_build_dind.groovy
index fc7b0ed615..5856fbdc01 100644
--- a/ci/pingcap_tidb_operator_build_dind.groovy
+++ b/ci/pingcap_tidb_operator_build_dind.groovy
@@ -55,6 +55,7 @@ def call(BUILD_BRANCH, CREDENTIALS_ID) {
 					export PATH=${env.PATH}:${WORKSPACE}/go/bin
 					make check
 					make test
+					bash <(curl -s https://codecov.io/bash)
 					make
 					make e2e-build
 					"""