diff --git a/common/pom.xml b/common/pom.xml
index 94f6c9f68..c5c5f949e 100644
--- a/common/pom.xml
+++ b/common/pom.xml
@@ -153,6 +153,15 @@
           <argLine>-Xmx1024m -XX:MaxPermSize=256m</argLine>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.scalatest</groupId>
+        <artifactId>scalatest-maven-plugin</artifactId>
+        <configuration>
+          <parallel>false</parallel>
+          <forkMode>once</forkMode>
+          <argLine>-Xmx2048m</argLine>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.xolstice.maven.plugins</groupId>
         <artifactId>protobuf-maven-plugin</artifactId>
diff --git a/common/src/test/scala/com/aliyun/emr/rss/common/meta/WorkerInfoSuite.scala b/common/src/test/scala/com/aliyun/emr/rss/common/meta/WorkerInfoSuite.scala
index d3eb503b2..eaf42ea82 100644
--- a/common/src/test/scala/com/aliyun/emr/rss/common/meta/WorkerInfoSuite.scala
+++ b/common/src/test/scala/com/aliyun/emr/rss/common/meta/WorkerInfoSuite.scala
@@ -149,6 +149,6 @@ class WorkerInfoSuite extends RssFunSuite {
   test("WorkerInfo equals when numSlots different.") {
     val worker1 = new WorkerInfo("h1", 10001, 10002, 10003, 1000, null, null)
     val worker2 = new WorkerInfo("h1", 10001, 10002, 10003, 2000, null, null)
-    assertEquals(worker1, worker2)
+    assertNotEquals(worker1, worker2)
   }
 }
diff --git a/server-master/pom.xml b/server-master/pom.xml
index db4ef8fd6..595773133 100644
--- a/server-master/pom.xml
+++ b/server-master/pom.xml
@@ -114,6 +114,11 @@
             <plugin>
                 <groupId>org.scalatest</groupId>
                 <artifactId>scalatest-maven-plugin</artifactId>
+                <configuration>
+                    <parallel>false</parallel>
+                    <forkMode>once</forkMode>
+                    <argLine>-Xmx2048m</argLine>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.xolstice.maven.plugins</groupId>