diff --git a/core/src/test/scala/org/apache/spark/deploy/security/ConfigurableCredentialManagerSuite.scala b/core/src/test/scala/org/apache/spark/deploy/security/ConfigurableCredentialManagerSuite.scala
index 532e3ae67b6df..347f6ff356a68 100644
--- a/core/src/test/scala/org/apache/spark/deploy/security/ConfigurableCredentialManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/security/ConfigurableCredentialManagerSuite.scala
@@ -17,12 +17,11 @@
 
 package org.apache.spark.deploy.security
 
-import org.scalatest.{BeforeAndAfter, Matchers}
-
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.io.Text
-import org.apache.hadoop.security.{Credentials, UserGroupInformation}
+import org.apache.hadoop.security.Credentials
 import org.apache.hadoop.security.token.Token
+import org.scalatest.{BeforeAndAfter, Matchers}
 
 import org.apache.spark.{SparkConf, SparkFunSuite}
 
diff --git a/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/security/ServiceCredentialProvider.scala b/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/security/ServiceCredentialProvider.scala
index d0cf4469e4600..f6883b1d5b656 100644
--- a/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/security/ServiceCredentialProvider.scala
+++ b/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/security/ServiceCredentialProvider.scala
@@ -56,4 +56,4 @@ trait ServiceCredentialProvider {
       hadoopConf: Configuration,
       sparkConf: SparkConf,
       creds: Credentials): Option[Long]
-}
\ No newline at end of file
+}
diff --git a/resource-managers/yarn/src/test/resources/META-INF/services/org.apache.spark.deploy.yarn.security.ServiceCredentialProvider b/resource-managers/yarn/src/test/resources/META-INF/services/org.apache.spark.deploy.yarn.security.ServiceCredentialProvider
index dfea80b38aed7..f31c232693133 100644
--- a/resource-managers/yarn/src/test/resources/META-INF/services/org.apache.spark.deploy.yarn.security.ServiceCredentialProvider
+++ b/resource-managers/yarn/src/test/resources/META-INF/services/org.apache.spark.deploy.yarn.security.ServiceCredentialProvider
@@ -1 +1 @@
-org.apache.spark.deploy.yarn.security.YARNTestCredentialProvider
\ No newline at end of file
+org.apache.spark.deploy.yarn.security.YARNTestCredentialProvider