diff --git a/src/main/java/hudson/plugins/s3/ClientHelper.java b/src/main/java/hudson/plugins/s3/ClientHelper.java
index 741e655b..318288e8 100644
--- a/src/main/java/hudson/plugins/s3/ClientHelper.java
+++ b/src/main/java/hudson/plugins/s3/ClientHelper.java
@@ -24,7 +24,11 @@ public class ClientHelper {
             com.amazonaws.services.s3.model.Region.US_Standard.toAWSRegion().getName());
     public static final String ENDPOINT = System.getProperty("hudson.plugins.s3.ENDPOINT", System.getenv("PLUGIN_S3_ENDPOINT"));
 
-    public static AmazonS3 createClient(String accessKey, String secretKey, boolean useRole, String region, ProxyConfiguration proxy)
+    public static AmazonS3 createClient(String accessKey, String secretKey, boolean useRole, String region, ProxyConfiguration proxy) {
+        return createClient(accessKey, secretKey, useRole, region, proxy, ENDPOINT);
+    }
+
+    public static AmazonS3 createClient(String accessKey, String secretKey, boolean useRole, String region, ProxyConfiguration proxy, String customEndpoint)
     {
         Region awsRegion = getRegionFromString(region);
 
@@ -36,8 +40,8 @@ public static AmazonS3 createClient(String accessKey, String secretKey, boolean
             builder = builder.withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey, secretKey)));
         }
 
-        if (StringUtils.isNotEmpty(ENDPOINT)) {
-            builder = builder.withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(ENDPOINT, awsRegion.getName()))
+        if (StringUtils.isNotEmpty(customEndpoint)) {
+            builder = builder.withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(customEndpoint, awsRegion.getName()))
                     .withPathStyleAccessEnabled(true);
         } else {
             builder = builder.withRegion(awsRegion.getName());
diff --git a/src/main/java/hudson/plugins/s3/callable/S3Callable.java b/src/main/java/hudson/plugins/s3/callable/S3Callable.java
index 68e3c1de..5dfa6ab8 100644
--- a/src/main/java/hudson/plugins/s3/callable/S3Callable.java
+++ b/src/main/java/hudson/plugins/s3/callable/S3Callable.java
@@ -7,8 +7,10 @@
 import hudson.ProxyConfiguration;
 import hudson.plugins.s3.ClientHelper;
 import hudson.util.Secret;
+import org.apache.commons.lang.StringUtils;
 import org.jenkinsci.remoting.RoleChecker;
 
+import java.io.ObjectStreamException;
 import java.util.HashMap;
 
 abstract class S3Callable<T> implements FileCallable<T> {
@@ -19,6 +21,7 @@ abstract class S3Callable<T> implements FileCallable<T> {
     private final boolean useRole;
     private final String region;
     private final ProxyConfiguration proxy;
+    private final String customEndpoint;
 
     private static transient HashMap<String, TransferManager> transferManagers = new HashMap<>();
 
@@ -28,12 +31,13 @@ abstract class S3Callable<T> implements FileCallable<T> {
         this.useRole = useRole;
         this.region = region;
         this.proxy = proxy;
+        this.customEndpoint = ClientHelper.ENDPOINT;
     }
 
     protected synchronized TransferManager getTransferManager() {
         final String uniqueKey = getUniqueKey();
         if (transferManagers.get(uniqueKey) == null) {
-            final AmazonS3 client = ClientHelper.createClient(accessKey, Secret.toString(secretKey), useRole, region, proxy);
+            final AmazonS3 client = ClientHelper.createClient(accessKey, Secret.toString(secretKey), useRole, region, proxy, customEndpoint);
             transferManagers.put(uniqueKey, TransferManagerBuilder.standard().withS3Client(client).build());
         }
 
diff --git a/src/test/java/hudson/plugins/s3/MinIOTest.java b/src/test/java/hudson/plugins/s3/MinIOTest.java
index cb1ddaf2..aede518c 100644
--- a/src/test/java/hudson/plugins/s3/MinIOTest.java
+++ b/src/test/java/hudson/plugins/s3/MinIOTest.java
@@ -98,10 +98,8 @@ public static void setUpClass() throws Exception {
         minioServiceEndpoint = String.format("%s:%s", minioServer.getContainerIpAddress(), mappedPort);
 
         final AmazonS3 client = AmazonS3ClientBuilder.standard()
-                //.withRegion("local")
                 .withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(ACCESS_KEY, SECRET_KEY)))
                 .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration("http://" + minioServiceEndpoint, "us-east-1"))
-                //.withForceGlobalBucketAccessEnabled(true)
                 .withPathStyleAccessEnabled(true)
                 .build();
 
@@ -124,7 +122,7 @@ public void testS3BucketPublisher() throws Throwable {
         rr.then(r -> {
             /*r.jenkins.setLabelString("work"); //Able to debug when running on the controller but not an agent
             r.jenkins.setNumExecutors(1);*/
-            r.createOnlineSlave(Label.get("work"), new EnvVars("PLUGIN_S3_ENDPOINT", "http://" + endpoint));
+            r.createOnlineSlave(Label.get("work"));
             createProfile();
             createAndRunPublisher(r);
         });
@@ -170,8 +168,8 @@ private static void createProfile() {
     public void testS3CopyArtifact() throws Throwable {
         final String endpoint = minioServiceEndpoint;
         rr.then(r -> {
-            r.createOnlineSlave(Label.get("work"), new EnvVars("PLUGIN_S3_ENDPOINT", "http://" + endpoint));
-            r.createOnlineSlave(Label.get("copy"), new EnvVars("PLUGIN_S3_ENDPOINT", "http://" + endpoint));
+            r.createOnlineSlave(Label.get("work"));
+            r.createOnlineSlave(Label.get("copy"));
 
             createProfile();
             createAndRunPublisher(r);