diff --git a/src/test/java/ma/luan/yiyan/api/ApiVerticleTest.java b/src/test/java/ma/luan/yiyan/api/ApiVerticleTest.java
index 87dd38f..55b6ab8 100644
--- a/src/test/java/ma/luan/yiyan/api/ApiVerticleTest.java
+++ b/src/test/java/ma/luan/yiyan/api/ApiVerticleTest.java
@@ -11,7 +11,7 @@
 import io.vertx.ext.web.client.WebClient;
 import io.vertx.ext.web.client.WebClientOptions;
 import ma.luan.yiyan.MainVerticle;
-import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -24,10 +24,10 @@
 
 @RunWith(VertxUnitRunner.class)
 public class ApiVerticleTest {
-    private WebClient webClient;
+    private static WebClient webClient;
 
-    @Before
-    public void beforeClass(TestContext context) {
+    @BeforeClass
+    public static void beforeClass(TestContext context) {
         Async async = context.async();
         Vertx vertx = Vertx.vertx();
         JsonObject config = new JsonObject(vertx.
diff --git a/src/test/java/ma/luan/yiyan/service/DataServiceTest.java b/src/test/java/ma/luan/yiyan/service/DataServiceTest.java
index ac71199..6570655 100644
--- a/src/test/java/ma/luan/yiyan/service/DataServiceTest.java
+++ b/src/test/java/ma/luan/yiyan/service/DataServiceTest.java
@@ -8,7 +8,7 @@
 import io.vertx.ext.unit.TestContext;
 import io.vertx.ext.unit.junit.VertxUnitRunner;
 import ma.luan.yiyan.constants.Key;
-import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -19,10 +19,10 @@
 
 @RunWith(VertxUnitRunner.class)
 public class DataServiceTest {
-    private Vertx vertx;
+    private static Vertx vertx;
 
-    @Before
-    public void beforeClass(TestContext context) {
+    @BeforeClass
+    public static void beforeClass(TestContext context) {
         Async async = context.async();
         vertx = Vertx.vertx();
         JsonObject config = new JsonObject(vertx.
diff --git a/src/test/java/ma/luan/yiyan/service/LogServiceTest.java b/src/test/java/ma/luan/yiyan/service/LogServiceTest.java
index 1c960ee..e96a897 100644
--- a/src/test/java/ma/luan/yiyan/service/LogServiceTest.java
+++ b/src/test/java/ma/luan/yiyan/service/LogServiceTest.java
@@ -7,7 +7,7 @@
 import io.vertx.ext.unit.TestContext;
 import io.vertx.ext.unit.junit.VertxUnitRunner;
 import ma.luan.yiyan.constants.Key;
-import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -17,14 +17,13 @@
 
 @RunWith(VertxUnitRunner.class)
 public class LogServiceTest {
-    private Vertx vertx;
-    private JsonObject config;
+    private static Vertx vertx;
 
-    @Before
-    public void beforeClass(TestContext context) {
+    @BeforeClass
+    public static void  beforeClass(TestContext context) {
         Async async = context.async();
         vertx = Vertx.vertx();
-        config = new JsonObject(vertx.
+        JsonObject config = new JsonObject(vertx.
                 fileSystem().readFileBlocking("conf.json"));
         vertx.deployVerticle(new LogService(), new DeploymentOptions().setConfig(config), c -> {
             async.complete();