diff --git a/Dockerfile b/Dockerfile
index b1e2c0340f504c8e7ab9b7313a4252b9f05a60d1..81c8131ccbcf8ab3cbf1005e4fc23b5731982a7f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,6 +11,7 @@ COPY go.mod/ .
 RUN go get -u github.com/golang/protobuf/protoc-gen-go
 RUN mkdir -p /build/pkg/api/v1
 RUN protoc --proto_path=/build/api/proto/v1 --proto_path=/build/third_party --go_out=plugins=grpc:/build/pkg/api/v1 config-service.proto
+RUN go test ./...
 WORKDIR /build/pkg/cmd/server
 RUN CGO_ENABLED=0 GOOS=linux go build
 
diff --git a/build_and_publish.sh b/build_and_publish.sh
index 9b293af49e028cbde4ac2e02f29c9dd77ab2be10..a44e22d42f4566d6bc4ee13f7d16d029c8a5277c 100755
--- a/build_and_publish.sh
+++ b/build_and_publish.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-TAG=1.2.0-SNAPSHOT
+TAG=LATEST
 WHAT=janitor
 sudo docker build --rm -t artifactory.geant.net/nmaas-docker-local/nmaas-$WHAT:$TAG .
 sudo docker push artifactory.geant.net/nmaas-docker-local/nmaas-$WHAT:$TAG
diff --git a/pkg/service/v1/config-service.go b/pkg/service/v1/config-service.go
index bca8092eae974a62971701dd18817a7a1f1684cc..e0a8d256e9f4d7ff9c038a9a16d9258792663fe0 100644
--- a/pkg/service/v1/config-service.go
+++ b/pkg/service/v1/config-service.go
@@ -18,6 +18,7 @@ import (
 
 const (
 	apiVersion = "v1"
+	namespaceNotFound = "Namespace not found"
 )
 
 type configServiceServer struct {
@@ -53,12 +54,10 @@ func NewReadinessServiceServer(kubeAPI *kubernetes.Clientset) v1.ReadinessServic
 	return &readinessServiceServer{kubeAPI: kubeAPI}
 }
 
-func checkAPI(api string) error {
-	if len(api) > 0 {
-		if apiVersion != api {
-			return status.Errorf(codes.Unimplemented,
-				"unsupported API version: service implements API version '%s', but asked for '%s'", apiVersion, api)
-		}
+func checkAPI(api string, current string) error {
+	if len(api) > 0 && current != api {
+		return status.Errorf(codes.Unimplemented,
+			"unsupported API version: service implements API version '%s', but asked for '%s'", apiVersion, api)
 	}
 	return nil
 }
@@ -181,7 +180,7 @@ func (s *configServiceServer) PrepareDataMapFromRepository(api *gitlab.Client, r
 //Create new configmap
 func (s *configServiceServer) CreateOrReplace(ctx context.Context, req *v1.InstanceRequest) (*v1.ServiceResponse, error) {
 	// check if the API version requested by client is supported by server
-	if err := checkAPI(req.Api); err != nil {
+	if err := checkAPI(req.Api, apiVersion); err != nil {
 		return nil, err
 	}
 
@@ -195,7 +194,7 @@ func (s *configServiceServer) CreateOrReplace(ctx context.Context, req *v1.Insta
 	//check if given k8s namespace exists
 	_, err = s.kubeAPI.CoreV1().Namespaces().Get(depl.Namespace, metav1.GetOptions{})
 	if err != nil {
-		return prepareResponse(v1.Status_FAILED, "Namespace not found!"), err
+		return prepareResponse(v1.Status_FAILED, namespaceNotFound), err
 	}
 
 	//check if configmap already exists
@@ -233,7 +232,7 @@ func (s *configServiceServer) CreateOrReplace(ctx context.Context, req *v1.Insta
 //Delete configmap for instance
 func (s *configServiceServer) DeleteIfExists(ctx context.Context, req *v1.InstanceRequest) (*v1.ServiceResponse, error) {
 	// check if the API version requested by client is supported by server
-	if err := checkAPI(req.Api); err != nil {
+	if err := checkAPI(req.Api, apiVersion); err != nil {
 		return nil, err
 	}
 
@@ -242,7 +241,7 @@ func (s *configServiceServer) DeleteIfExists(ctx context.Context, req *v1.Instan
 	//check if given k8s namespace exists
 	_, err := s.kubeAPI.CoreV1().Namespaces().Get(depl.Namespace, metav1.GetOptions{})
 	if err != nil {
-		return prepareResponse(v1.Status_FAILED, "Namespace not found!"), err
+		return prepareResponse(v1.Status_FAILED, namespaceNotFound), err
 	}
 
 	//check if configmap exist
@@ -295,7 +294,7 @@ func getAuthSecretName(uid string) string {
 
 func (s *basicAuthServiceServer) CreateOrReplace(ctx context.Context, req *v1.InstanceCredentialsRequest) (*v1.ServiceResponse, error) {
 	// check if the API version requested by client is supported by server
-	if err := checkAPI(req.Api); err != nil {
+	if err := checkAPI(req.Api, apiVersion); err != nil {
 		return nil, err
 	}
 
@@ -304,7 +303,7 @@ func (s *basicAuthServiceServer) CreateOrReplace(ctx context.Context, req *v1.In
 	//check if given k8s namespace exists
 	_, err := s.kubeAPI.CoreV1().Namespaces().Get(depl.Namespace, metav1.GetOptions{})
 	if err != nil {
-		return prepareResponse(v1.Status_FAILED, "Namespace not found!"), err
+		return prepareResponse(v1.Status_FAILED, namespaceNotFound), err
 	}
 
 	//create secret
@@ -327,7 +326,7 @@ func (s *basicAuthServiceServer) CreateOrReplace(ctx context.Context, req *v1.In
 
 func (s *basicAuthServiceServer) DeleteIfExists(ctx context.Context, req *v1.InstanceRequest) (*v1.ServiceResponse, error) {
 	// check if the API version requested by client is supported by server
-	if err := checkAPI(req.Api); err != nil {
+	if err := checkAPI(req.Api, apiVersion); err != nil {
 		return nil, err
 	}
 
@@ -336,7 +335,7 @@ func (s *basicAuthServiceServer) DeleteIfExists(ctx context.Context, req *v1.Ins
 	//check if given k8s namespace exists
 	_, err := s.kubeAPI.CoreV1().Namespaces().Get(depl.Namespace, metav1.GetOptions{})
 	if err != nil {
-		return prepareResponse(v1.Status_FAILED, "Namespace not found!"), err
+		return prepareResponse(v1.Status_FAILED, namespaceNotFound), err
 	}
 
 	secretName := getAuthSecretName(depl.Uid)
@@ -358,7 +357,7 @@ func (s *basicAuthServiceServer) DeleteIfExists(ctx context.Context, req *v1.Ins
 
 func (s *certManagerServiceServer) DeleteIfExists(ctx context.Context, req *v1.InstanceRequest) (*v1.ServiceResponse, error) {
 	// check if the API version requested by client is supported by server
-	if err := checkAPI(req.Api); err != nil {
+	if err := checkAPI(req.Api, apiVersion); err != nil {
 		return nil, err
 	}
 
@@ -367,7 +366,7 @@ func (s *certManagerServiceServer) DeleteIfExists(ctx context.Context, req *v1.I
 	//check if given k8s namespace exists
 	_, err := s.kubeAPI.CoreV1().Namespaces().Get(depl.Namespace, metav1.GetOptions{})
 	if err != nil {
-		return prepareResponse(v1.Status_FAILED, "Namespace not found!"), err
+		return prepareResponse(v1.Status_FAILED, namespaceNotFound), err
 	}
 
 	secretName := depl.Uid + "-tls"
@@ -389,7 +388,7 @@ func (s *certManagerServiceServer) DeleteIfExists(ctx context.Context, req *v1.I
 
 func (s *readinessServiceServer) CheckIfReady(ctx context.Context, req *v1.InstanceRequest) (*v1.ServiceResponse, error) {
 	// check if the API version requested by client is supported by server
-	if err := checkAPI(req.Api); err != nil {
+	if err := checkAPI(req.Api, apiVersion); err != nil {
 		return nil, err
 	}
 
@@ -398,7 +397,7 @@ func (s *readinessServiceServer) CheckIfReady(ctx context.Context, req *v1.Insta
 	//check if given k8s namespace exists
 	_, err := s.kubeAPI.CoreV1().Namespaces().Get(depl.Namespace, metav1.GetOptions{})
 	if err != nil {
-		return prepareResponse(v1.Status_FAILED, "Namespace not found!"), err
+		return prepareResponse(v1.Status_FAILED, namespaceNotFound), err
 	}
 
 	app, err := s.kubeAPI.ExtensionsV1beta1().Deployments(depl.Namespace).Get(depl.Uid, metav1.GetOptions{})
diff --git a/pkg/service/v1/config-service_test.go b/pkg/service/v1/config-service_test.go
index afb968f87d8e8e937fb84546f1bd94ed143b4ed8..657e50e4038b02a1640279ec75a20f98f7c21dcc 100644
--- a/pkg/service/v1/config-service_test.go
+++ b/pkg/service/v1/config-service_test.go
@@ -1,3 +1,18 @@
 package v1
 
-//TODO: add tests
\ No newline at end of file
+import "testing"
+
+func TestCheckAPI(t *testing.T) {
+	api := "wrong"
+	current := "correct"
+	err := checkAPI(api, current)
+	if err == nil {
+		t.Fail()
+	}
+
+	api = "correct"
+	err = checkAPI(api, current)
+	if err != nil {
+		t.Fail()
+	}
+}
\ No newline at end of file