diff --git a/client_test.go b/client_test.go
index 34510b1..be9b51d 100644
--- a/client_test.go
+++ b/client_test.go
@@ -1,20 +1,11 @@
 package client
 
 import (
-	"os"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 )
 
-func getEnv(key, fallback string) string {
-	value, exist := os.LookupEnv(key)
-	if !exist {
-		return fallback
-	}
-	return value
-}
-
 func getDefaultConfig() Config {
 	return Config{
 		URL:      getEnv("NEXUS_URL", "http://127.0.0.1:8081"),
diff --git a/tools.go b/tools.go
index 14cd168..ca34ff6 100644
--- a/tools.go
+++ b/tools.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"os"
 )
 
 func jsonMarshalInterfaceToIOReader(data interface{}) (io.Reader, error) {
@@ -15,3 +16,10 @@ func jsonMarshalInterfaceToIOReader(data interface{}) (io.Reader, error) {
 
 	return bytes.NewReader(b), nil
 }
+
+func getEnv(key, fallback string) string {
+	if value, exists := os.LookupEnv(key); exists {
+		return value
+	}
+	return fallback
+}