diff --git a/Makefile b/Makefile
index 36974cb..00be0e2 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,9 @@ endif
 build: clean
 	sh script/build.sh $(VERSION)
 
+coverage:
+	sh go.test.sh atomic
+
 test: redis_test boltdb_test memory_test config_test
 	go test -v -cover -covermode=count -coverprofile=coverage.txt ./gorush/...
 
@@ -41,7 +44,7 @@ config_test: init
 	go test -v -cover -covermode=count -coverprofile=coverage.txt ./config/...
 
 html:
-	go tool cover -html=coverage.txt && unlink coverage.txt
+	go tool cover -html=coverage.txt
 
 docker_build: clean
 	tar -zcvf build.tar.gz gorush.go gorush config storage Makefile glide.lock glide.yaml
diff --git a/go.test.sh b/go.test.sh
new file mode 100755
index 0000000..96295a8
--- /dev/null
+++ b/go.test.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -e
+
+output() {
+  printf "\033[32m"
+  echo $1
+  printf "\033[0m"
+  exit 0
+}
+
+coverage_mode=$1
+
+test -z $coverage_mode && output "Usage: $0 coverage_mode"
+
+test -f coverage.txt && rm -rf coverage.txt
+echo "mode: ${coverage_mode}" > coverage.txt
+
+for d in ./storage/boltdb/... ./storage/redis/... ./storage/memory/... ./config/... ./gorush/...; do
+  go test -v -cover -coverprofile=profile.out -covermode=${coverage_mode} $d
+  if [ -f profile.out ]; then
+    sed '1d' profile.out >> coverage.txt
+    rm profile.out
+  fi
+done