diff --git a/metrics/http_metrics.go b/metrics/http_metrics.go
index ff98b1d..1ba58b7 100644
--- a/metrics/http_metrics.go
+++ b/metrics/http_metrics.go
@@ -32,8 +32,8 @@ type httpServerMetric struct {
 func NewHttpServerMetric(
 	namespace string,
 	labelNames []string,
-	staticLabels prometheus.Labels,
 	reg prometheus.Registerer,
+	labels ...Label,
 ) HttpServerMetric {
 	requestStarted := prometheus.NewGaugeVec(prometheus.GaugeOpts{
 		Namespace: namespace,
@@ -65,6 +65,11 @@ func NewHttpServerMetric(
 		Help:      "Total number of the 5xx requests.",
 	}, labelNames)
 
+	staticLabels := make(map[string]string)
+	for _, label := range labels {
+		staticLabels[label.Key] = label.Value
+	}
+
 	Register(staticLabels, reg, requestStarted, requestDurationSeconds, requestSucceededTotal, requestClientErrTotal, requestServerErrTotal)
 
 	return &httpServerMetric{
diff --git a/metrics/metrics.go b/metrics/metrics.go
index e440aae..565c6ae 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -29,11 +29,16 @@ type performanceMetric struct {
 	executionFailedTotal     *prometheus.CounterVec
 }
 
+type Label struct {
+	Key   string
+	Value string
+}
+
 func NewPerformanceMetric(
 	namespace string,
 	labelNames []string,
-	staticLabels prometheus.Labels,
 	reg prometheus.Registerer,
+	labels ...Label,
 ) PerformanceMetric {
 	executionStarted := prometheus.NewGaugeVec(prometheus.GaugeOpts{
 		Namespace: namespace,
@@ -59,6 +64,11 @@ func NewPerformanceMetric(
 		Help:      "Total number of the executions which failed.",
 	}, labelNames)
 
+	staticLabels := make(map[string]string)
+	for _, label := range labels {
+		staticLabels[label.Key] = label.Value
+	}
+
 	Register(staticLabels, reg, executionStarted, executionDurationSeconds, executionSucceededTotal, executionFailedTotal)
 
 	return &performanceMetric{
diff --git a/middleware/metrics.go b/middleware/metrics.go
index 1b6ebe3..f5a2bd6 100644
--- a/middleware/metrics.go
+++ b/middleware/metrics.go
@@ -10,8 +10,8 @@ import (
 const labelPath = "path"
 const labelMethod = "method"
 
-func MetricsMiddleware(namespace string, labels prometheus.Labels, reg prometheus.Registerer) gin.HandlerFunc {
-	perfMetric := metrics.NewHttpServerMetric(namespace, []string{labelPath, labelMethod}, labels, reg)
+func MetricsMiddleware(namespace string, reg prometheus.Registerer, labels ...metrics.Label) gin.HandlerFunc {
+	perfMetric := metrics.NewHttpServerMetric(namespace, []string{labelPath, labelMethod}, reg, labels...)
 	return func(c *gin.Context) {
 		path := c.FullPath()
 		method := c.Request.Method
diff --git a/middleware/metrics_test.go b/middleware/metrics_test.go
index 3a4417c..c3c35a5 100644
--- a/middleware/metrics_test.go
+++ b/middleware/metrics_test.go
@@ -13,7 +13,7 @@ import (
 func TestMetricsMiddleware(t *testing.T) {
 	r := prometheus.NewRegistry()
 	router := gin.New()
-	router.Use(MetricsMiddleware("", nil, r))
+	router.Use(MetricsMiddleware("", r))
 
 	successGroup := router.Group("/success")
 	successGroup.GET("/:test", func(c *gin.Context) {
diff --git a/testy/tagged.go b/testy/tagged.go
index 280f8e1..31b2285 100644
--- a/testy/tagged.go
+++ b/testy/tagged.go
@@ -15,18 +15,22 @@ const (
 
 // TaggedTestsEnvVar defines the name of the environment variable for the tagged tests.
 // Example:
-// 		TaggedTestsEnvVar="TEST_TAGS"
-//		env TEST_TAGS="unit" go test ./...
+//
+//	TaggedTestsEnvVar="TEST_TAGS"
+//	env TEST_TAGS="unit" go test ./...
 var TaggedTestsEnvVar = "TEST_TAGS"
 
 // RequireTestTag runs the test if the provided tag matches at least one runtime tag.
 // Example:
-// 		func TestSomething(t *testing.T) {
-//    		RequireTestTag(t, "unit")
-//    		...
-// 		}
+//
+//			func TestSomething(t *testing.T) {
+//	   		RequireTestTag(t, "unit")
+//	   		...
+//			}
+//
 // Run with:
-// 		env TEST_TAGS="unit,integration" go test ./...
+//
+//	env TEST_TAGS="unit,integration" go test ./...
 func RequireTestTag(t *testing.T, testTag string) {
 	if !getRuntimeTags().contains(testTag) {
 		t.Skipf("skipping test '%s', requires '%s' tag", t.Name(), testTag)