diff --git a/services/instance.go b/services/instance.go
index 315f213..e83c43f 100644
--- a/services/instance.go
+++ b/services/instance.go
@@ -76,7 +76,6 @@ func (i *Instance) SetSession(s *Session) {
 }
 
 var dindImage string
-var defaultDindImageName string
 
 func init() {
 	dindImage = getDindImageName()
@@ -84,7 +83,7 @@ func init() {
 
 func getDindImageName() string {
 	dindImage := os.Getenv("DIND_IMAGE")
-	defaultDindImageName = "franela/dind"
+	defaultDindImageName := "franela/dind"
 	if len(dindImage) == 0 {
 		dindImage = defaultDindImageName
 	}
diff --git a/services/instance_images.go b/services/instance_images.go
index 10e4502..9d6c04d 100644
--- a/services/instance_images.go
+++ b/services/instance_images.go
@@ -3,7 +3,7 @@ package services
 func InstanceImages() []string {
 
 	return []string{
-		defaultDindImageName,
+		dindImage,
 		"franela/dind:overlay2-dev",
 	}