diff --git a/.gitignore b/.gitignore
index d110969..51a1a3b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -333,3 +333,6 @@ ASALocalRun/
 bin/
 vendor/
 _dist/
+c.out
+coverage.html
+
diff --git a/Gopkg.lock b/Gopkg.lock
index e00a06d..b0f7f6b 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -72,6 +72,14 @@
   pruneopts = "UT"
   revision = "5a15988393449988e8d4ea493df73df2684675f2"
 
+[[projects]]
+  digest = "1:f1f2bd73c025d24c3b93abf6364bccb802cf2fdedaa44360804c67800e8fab8d"
+  name = "github.com/evanphx/json-patch"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "72bf35d0ff611848c1dc9df0f976c81192392fa5"
+  version = "v4.1.0"
+
 [[projects]]
   digest = "1:abeb38ade3f32a92943e5be54f55ed6d6e3b6602761d74b4aab4c9dd45c18abd"
   name = "github.com/fsnotify/fsnotify"
@@ -273,6 +281,14 @@
   revision = "5f041e8faa004a95c88a202771f4cc3e991971e6"
   version = "v2.0.1"
 
+[[projects]]
+  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  pruneopts = "UT"
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
 [[projects]]
   digest = "1:93a746f1060a8acbcf69344862b2ceced80f854170e1caae089b2834c5fbf7f4"
   name = "github.com/prometheus/client_golang"
@@ -362,6 +378,14 @@
   revision = "6d33b5a963d922d182c91e8a1c88d81fd150cfd4"
   version = "v1.3.1"
 
+[[projects]]
+  digest = "1:25f2747b063c0a656195ef85413cef8c9f2bbe128deab7d39563a6ca1e536070"
+  name = "github.com/stretchr/testify"
+  packages = ["assert"]
+  pruneopts = "UT"
+  revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
+  version = "v1.1.4"
+
 [[projects]]
   digest = "1:d1816f8f4877e87cf0a80a25fbc0e7c7a6937bd728ccbf85e2c151c792445a1b"
   name = "github.com/thoas/go-funk"
@@ -592,44 +616,78 @@
   version = "kubernetes-1.13.0"
 
 [[projects]]
-  digest = "1:032912062bdb7ab2fd018235e24831f9eea6735ba875886323eae616c6088961"
+  digest = "1:ccdff5d2d86fb5dd1a4f9c217c574ab6965d91f46d9288f71dd565aa9760cc58"
   name = "k8s.io/client-go"
   packages = [
     "discovery",
+    "discovery/fake",
     "kubernetes",
+    "kubernetes/fake",
     "kubernetes/scheme",
     "kubernetes/typed/admissionregistration/v1alpha1",
+    "kubernetes/typed/admissionregistration/v1alpha1/fake",
     "kubernetes/typed/admissionregistration/v1beta1",
+    "kubernetes/typed/admissionregistration/v1beta1/fake",
     "kubernetes/typed/apps/v1",
+    "kubernetes/typed/apps/v1/fake",
     "kubernetes/typed/apps/v1beta1",
+    "kubernetes/typed/apps/v1beta1/fake",
     "kubernetes/typed/apps/v1beta2",
+    "kubernetes/typed/apps/v1beta2/fake",
     "kubernetes/typed/auditregistration/v1alpha1",
+    "kubernetes/typed/auditregistration/v1alpha1/fake",
     "kubernetes/typed/authentication/v1",
+    "kubernetes/typed/authentication/v1/fake",
     "kubernetes/typed/authentication/v1beta1",
+    "kubernetes/typed/authentication/v1beta1/fake",
     "kubernetes/typed/authorization/v1",
+    "kubernetes/typed/authorization/v1/fake",
     "kubernetes/typed/authorization/v1beta1",
+    "kubernetes/typed/authorization/v1beta1/fake",
     "kubernetes/typed/autoscaling/v1",
+    "kubernetes/typed/autoscaling/v1/fake",
     "kubernetes/typed/autoscaling/v2beta1",
+    "kubernetes/typed/autoscaling/v2beta1/fake",
     "kubernetes/typed/autoscaling/v2beta2",
+    "kubernetes/typed/autoscaling/v2beta2/fake",
     "kubernetes/typed/batch/v1",
+    "kubernetes/typed/batch/v1/fake",
     "kubernetes/typed/batch/v1beta1",
+    "kubernetes/typed/batch/v1beta1/fake",
     "kubernetes/typed/batch/v2alpha1",
+    "kubernetes/typed/batch/v2alpha1/fake",
     "kubernetes/typed/certificates/v1beta1",
+    "kubernetes/typed/certificates/v1beta1/fake",
     "kubernetes/typed/coordination/v1beta1",
+    "kubernetes/typed/coordination/v1beta1/fake",
     "kubernetes/typed/core/v1",
+    "kubernetes/typed/core/v1/fake",
     "kubernetes/typed/events/v1beta1",
+    "kubernetes/typed/events/v1beta1/fake",
     "kubernetes/typed/extensions/v1beta1",
+    "kubernetes/typed/extensions/v1beta1/fake",
     "kubernetes/typed/networking/v1",
+    "kubernetes/typed/networking/v1/fake",
     "kubernetes/typed/policy/v1beta1",
+    "kubernetes/typed/policy/v1beta1/fake",
     "kubernetes/typed/rbac/v1",
+    "kubernetes/typed/rbac/v1/fake",
     "kubernetes/typed/rbac/v1alpha1",
+    "kubernetes/typed/rbac/v1alpha1/fake",
     "kubernetes/typed/rbac/v1beta1",
+    "kubernetes/typed/rbac/v1beta1/fake",
     "kubernetes/typed/scheduling/v1alpha1",
+    "kubernetes/typed/scheduling/v1alpha1/fake",
     "kubernetes/typed/scheduling/v1beta1",
+    "kubernetes/typed/scheduling/v1beta1/fake",
     "kubernetes/typed/settings/v1alpha1",
+    "kubernetes/typed/settings/v1alpha1/fake",
     "kubernetes/typed/storage/v1",
+    "kubernetes/typed/storage/v1/fake",
     "kubernetes/typed/storage/v1alpha1",
+    "kubernetes/typed/storage/v1alpha1/fake",
     "kubernetes/typed/storage/v1beta1",
+    "kubernetes/typed/storage/v1beta1/fake",
     "pkg/apis/clientauthentication",
     "pkg/apis/clientauthentication/v1alpha1",
     "pkg/apis/clientauthentication/v1beta1",
@@ -637,6 +695,7 @@
     "plugin/pkg/client/auth/exec",
     "rest",
     "rest/watch",
+    "testing",
     "tools/auth",
     "tools/cache",
     "tools/clientcmd",
@@ -706,6 +765,7 @@
     "github.com/prometheus/client_golang/prometheus/promhttp",
     "github.com/spf13/pflag",
     "github.com/spf13/viper",
+    "github.com/stretchr/testify/assert",
     "github.com/thoas/go-funk",
     "github.com/tidwall/gjson",
     "k8s.io/api/core/v1",
@@ -713,6 +773,7 @@
     "k8s.io/apimachinery/pkg/apis/meta/v1",
     "k8s.io/apimachinery/pkg/fields",
     "k8s.io/client-go/kubernetes",
+    "k8s.io/client-go/kubernetes/fake",
     "k8s.io/client-go/kubernetes/scheme",
     "k8s.io/client-go/rest",
     "k8s.io/client-go/tools/cache",
diff --git a/Gopkg.toml b/Gopkg.toml
index 9f96244..b450168 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -80,3 +80,7 @@
 [[constraint]]
   branch = "master"
   name = "github.com/dimiro1/health"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.1.4"
diff --git a/Makefile b/Makefile
index 9b4305c..0f66e29 100644
--- a/Makefile
+++ b/Makefile
@@ -74,10 +74,11 @@ docker-publish-latest:
 	docker push oxynozeta/kubernetes-tagger:latest
 
 test: dep ## Run unittests
-	$(GO) test -short ${PKG_LIST}
+	$(GO) test -short -cover -coverprofile=c.out ${PKG_LIST}
 
-race: dep ## Run data race detector
-	$(GO) test -race -short ${PKG_LIST}
+.PHONY: coverage-report
+coverage-report:
+	$(GO) tool cover -html=c.out -o coverage.html 
 
 .PHONY: clean
 clean:
diff --git a/pkg/kubernetes-tagger/business/model.go b/pkg/kubernetes-tagger/business/model.go
index 536c18e..ee65c42 100644
--- a/pkg/kubernetes-tagger/business/model.go
+++ b/pkg/kubernetes-tagger/business/model.go
@@ -56,6 +56,12 @@ func (context *Context) runForPV(pv *v1.PersistentVolume) error {
 		return nil
 	}
 
+	// Check if configuration is valid before continue
+	err = resource.CheckIfConfigurationValid()
+	if err != nil {
+		return err
+	}
+
 	// Get actual tags
 	actualTags, err := resource.GetActualTags()
 	if err != nil {
diff --git a/pkg/kubernetes-tagger/resources/awsvolume.go b/pkg/kubernetes-tagger/resources/awsvolume.go
index b8baffd..536e80b 100644
--- a/pkg/kubernetes-tagger/resources/awsvolume.go
+++ b/pkg/kubernetes-tagger/resources/awsvolume.go
@@ -1,6 +1,7 @@
 package resources
 
 import (
+	"errors"
 	"fmt"
 	"net/url"
 	"strings"
@@ -12,11 +13,15 @@ import (
 	"github.com/aws/aws-sdk-go/service/ec2"
 	"github.com/oxyno-zeta/kubernetes-tagger/pkg/kubernetes-tagger/config"
 	v1 "k8s.io/api/core/v1"
-	k8serrors "k8s.io/apimachinery/pkg/api/errors"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 )
 
+// ErrEmptyAWSConfiguration Error Empty AWS Configuration
+var ErrEmptyAWSConfiguration = errors.New("AWS configuration is empty")
+
+// ErrEmptyAWSRegionConfiguration Error Empty AWS Region Configuration
+var ErrEmptyAWSRegionConfiguration = errors.New("AWS Region is empty in configuration")
+
 // AWSVolume AWS Volume
 type AWSVolume struct {
 	resourceType     string
@@ -28,12 +33,6 @@ type AWSVolume struct {
 	log              *logrus.Entry
 }
 
-// AWSVolumeResourceType AWS Volume Resource Type
-const AWSVolumeResourceType = "volume"
-
-// AWSResourcePlatform AWS Resource Platform
-const AWSResourcePlatform = "aws"
-
 // Type Get type
 func (av *AWSVolume) Type() string {
 	return av.resourceType
@@ -84,9 +83,20 @@ func isAWSVolumeResource(pv *v1.PersistentVolume) bool {
 	return pv.Spec.AWSElasticBlockStore != nil
 }
 
+// CheckIfConfigurationValid Check if configuration is valid
+func (av *AWSVolume) CheckIfConfigurationValid() error {
+	if av.awsConfig == nil {
+		return ErrEmptyAWSConfiguration
+	}
+	if av.awsConfig.Region == "" {
+		return ErrEmptyAWSRegionConfiguration
+	}
+	return nil
+}
+
 // GetAvailableTagValues Get available tags
 func (av *AWSVolume) GetAvailableTagValues() (map[string]interface{}, error) {
-	pvc, err := av.getPersistentVolumeClaim()
+	pvc, err := getPersistentVolumeClaim(av.persistentVolume, av.k8sClient)
 	if err != nil {
 		return nil, err
 	}
@@ -222,16 +232,3 @@ func (av *AWSVolume) getAWSEC2Client() (*ec2.EC2, error) {
 	svc := ec2.New(sess)
 	return svc, nil
 }
-
-func (av *AWSVolume) getPersistentVolumeClaim() (*v1.PersistentVolumeClaim, error) {
-	claimRef := av.persistentVolume.Spec.ClaimRef
-	if claimRef == nil {
-		return nil, nil
-	}
-
-	pvc, err := av.k8sClient.CoreV1().PersistentVolumeClaims(claimRef.Namespace).Get(claimRef.Name, metav1.GetOptions{})
-	if err != nil && !k8serrors.IsNotFound(err) {
-		return nil, err
-	}
-	return pvc, nil
-}
diff --git a/pkg/kubernetes-tagger/resources/model.go b/pkg/kubernetes-tagger/resources/model.go
index 5e2801c..b1e164c 100644
--- a/pkg/kubernetes-tagger/resources/model.go
+++ b/pkg/kubernetes-tagger/resources/model.go
@@ -23,6 +23,7 @@ type Resource interface {
 	Type() string
 	Platform() string
 	CanBeProcessed() bool
+	CheckIfConfigurationValid() error
 	GetAvailableTagValues() (map[string]interface{}, error)
 	GetActualTags() ([]*Tag, error)
 	ManageTags(delta *TagDelta) error
diff --git a/pkg/kubernetes-tagger/resources/utils.go b/pkg/kubernetes-tagger/resources/utils.go
new file mode 100644
index 0000000..c6c3140
--- /dev/null
+++ b/pkg/kubernetes-tagger/resources/utils.go
@@ -0,0 +1,27 @@
+package resources
+
+import (
+	v1 "k8s.io/api/core/v1"
+	k8serrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+)
+
+// AWSVolumeResourceType AWS Volume Resource Type
+const AWSVolumeResourceType = "volume"
+
+// AWSResourcePlatform AWS Resource Platform
+const AWSResourcePlatform = "aws"
+
+func getPersistentVolumeClaim(persistentVolume *v1.PersistentVolume, k8sClient kubernetes.Interface) (*v1.PersistentVolumeClaim, error) {
+	claimRef := persistentVolume.Spec.ClaimRef
+	if claimRef == nil {
+		return nil, nil
+	}
+
+	pvc, err := k8sClient.CoreV1().PersistentVolumeClaims(claimRef.Namespace).Get(claimRef.Name, metav1.GetOptions{})
+	if err != nil && !k8serrors.IsNotFound(err) {
+		return nil, err
+	}
+	return pvc, nil
+}
diff --git a/pkg/kubernetes-tagger/resources/utils_test.go b/pkg/kubernetes-tagger/resources/utils_test.go
new file mode 100644
index 0000000..ed58b5d
--- /dev/null
+++ b/pkg/kubernetes-tagger/resources/utils_test.go
@@ -0,0 +1,56 @@
+package resources
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	testclient "k8s.io/client-go/kubernetes/fake"
+)
+
+func TestGetPersistentVolumeClaimWithoutClaimRef(t *testing.T) {
+	spec := v1.PersistentVolumeSpec{ClaimRef: nil}
+	pv := v1.PersistentVolume{Spec: spec}
+
+	// Call code
+	res, err := getPersistentVolumeClaim(&pv, nil)
+
+	assert.Nil(t, res)
+	assert.Nil(t, err)
+}
+
+func TestGetPersistentVolumeClaimWithClaimNotFound(t *testing.T) {
+	claimRef := v1.ObjectReference{Namespace: "test-claim-ref-namespace", Name: "test-claim-ref-name"}
+	spec := v1.PersistentVolumeSpec{ClaimRef: &claimRef}
+	pv := v1.PersistentVolume{Spec: spec}
+
+	client := testclient.NewSimpleClientset()
+
+	// Call code
+	res, err := getPersistentVolumeClaim(&pv, client)
+
+	assert.Nil(t, res)
+	assert.Nil(t, err)
+}
+
+func TestGetPersistentVolumeClaimWithClaimFound(t *testing.T) {
+	claimRefNamespace := "test-claim-ref-namespace"
+	claimRefName := "test-claim-ref-name"
+	claimRef := v1.ObjectReference{Namespace: claimRefNamespace, Name: claimRefName}
+	spec := v1.PersistentVolumeSpec{ClaimRef: &claimRef}
+	pv := v1.PersistentVolume{Spec: spec}
+
+	// PVC
+	pvc := &v1.PersistentVolumeClaim{ObjectMeta: metav1.ObjectMeta{Name: claimRefName, Namespace: claimRefNamespace}}
+
+	client := testclient.NewSimpleClientset(pvc)
+
+	// Call code
+	res, err := getPersistentVolumeClaim(&pv, client)
+
+	assert.NotNil(t, res)
+	assert.Nil(t, err)
+	assert.Equal(t, pvc, res)
+}
diff --git a/pkg/kubernetes-tagger/version/version_test.go b/pkg/kubernetes-tagger/version/version_test.go
new file mode 100644
index 0000000..1cdf863
--- /dev/null
+++ b/pkg/kubernetes-tagger/version/version_test.go
@@ -0,0 +1,43 @@
+package version
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetVersionWithDefault(t *testing.T) {
+	// Call code
+	res := GetVersion()
+
+	assert.Exactly(t, "-unreleased", res.Version)
+	assert.Empty(t, res.GitCommit)
+	assert.Empty(t, res.BuildDate)
+}
+
+func TestGetVersionNotReleased(t *testing.T) {
+	Version = "version"
+	GitCommit = "sha1"
+	BuildDate = "04-03-2019"
+
+	// Call code
+	res := GetVersion()
+
+	assert.Exactly(t, "version-unreleased", res.Version)
+	assert.Exactly(t, "sha1", res.GitCommit)
+	assert.Exactly(t, "04-03-2019", res.BuildDate)
+}
+
+func TestGetVersionReleased(t *testing.T) {
+	Version = "version"
+	GitCommit = "sha1"
+	BuildDate = "04-03-2019"
+	Metadata = ""
+
+	// Call code
+	res := GetVersion()
+
+	assert.Exactly(t, "version", res.Version)
+	assert.Exactly(t, "sha1", res.GitCommit)
+	assert.Exactly(t, "04-03-2019", res.BuildDate)
+}