diff --git a/src/main/java/com/bandwidth/iris/sdk/IrisClient.java b/src/main/java/com/bandwidth/iris/sdk/IrisClient.java
index 0966dbb..93f07f0 100644
--- a/src/main/java/com/bandwidth/iris/sdk/IrisClient.java
+++ b/src/main/java/com/bandwidth/iris/sdk/IrisClient.java
@@ -5,12 +5,14 @@
 import com.bandwidth.iris.sdk.utils.XmlUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.http.Header;
+import org.apache.http.HttpHost;
 import org.apache.http.HttpResponse;
 import org.apache.http.auth.AuthScope;
 import org.apache.http.auth.Credentials;
 import org.apache.http.auth.UsernamePasswordCredentials;
 import org.apache.http.client.methods.*;
 import org.apache.http.client.utils.URIBuilder;
+import org.apache.http.conn.params.ConnRoutePNames;
 import org.apache.http.entity.ContentType;
 import org.apache.http.entity.FileEntity;
 import org.apache.http.entity.StringEntity;
@@ -47,6 +49,17 @@ public IrisClient(String accountId, String userName, String password) {
         this(defaultUri, accountId, userName, password, defaultVersion);
     }
 
+    public IrisClient(DefaultHttpClient httpClient, String uri, String accountId, String username, String password) {
+        this.uri = uri;
+        this.baseUrl = "/" + defaultVersion + "/";
+        this.baseAccountUrl = this.baseUrl + "accounts/" + accountId + "/";
+
+        Credentials credentials = new UsernamePasswordCredentials(username, password);
+        httpClient.getCredentialsProvider().setCredentials(AuthScope.ANY, credentials);
+
+        this.httpClient = httpClient;
+    }
+
     private void initHttpClient(String userName, String password) {
         httpClient = new DefaultHttpClient();
         Credentials credentials = new UsernamePasswordCredentials(userName, password);
diff --git a/src/test/java/com/bandwidth/iris/sdk/BaseModelTests.java b/src/test/java/com/bandwidth/iris/sdk/BaseModelTests.java
index 6454f1c..707b6cd 100644
--- a/src/test/java/com/bandwidth/iris/sdk/BaseModelTests.java
+++ b/src/test/java/com/bandwidth/iris/sdk/BaseModelTests.java
@@ -1,6 +1,15 @@
 package com.bandwidth.iris.sdk;
 
 import com.github.tomakehurst.wiremock.junit.WireMockRule;
+import org.apache.http.HttpHost;
+import org.apache.http.auth.AuthScope;
+import org.apache.http.auth.Credentials;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.CredentialsProvider;
+import org.apache.http.conn.params.ConnRoutePNames;
+import org.apache.http.impl.client.BasicCredentialsProvider;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.impl.client.ProxyAuthenticationStrategy;
 import org.junit.Rule;
 import org.junit.rules.ExpectedException;
 
@@ -16,6 +25,20 @@ protected IrisClient getDefaultClient() {
         return new IrisClient("http://localhost:8090", "accountId", "username", "password", "v1.0");
     }
 
+    protected IrisClient getCustomClient() {
+        DefaultHttpClient client = new DefaultHttpClient();
+        HttpHost proxy = new HttpHost("localhost",8090);
+        client.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,proxy);
+
+        Credentials credentials = new UsernamePasswordCredentials("userName", "password");
+        CredentialsProvider credsProvider = new BasicCredentialsProvider();
+        credsProvider.setCredentials( new AuthScope("localhost",8080), credentials);
+
+        client.setProxyAuthenticationStrategy(new ProxyAuthenticationStrategy());
+
+        return new IrisClient(client, "http://localhost:8090", "accountId", "username", "password");
+    }
+
     public void setMessage(String s) {
         this.message = s;
     }
diff --git a/src/test/java/com/bandwidth/iris/sdk/OrderTests.java b/src/test/java/com/bandwidth/iris/sdk/OrderTests.java
index cbbdc78..b615d54 100644
--- a/src/test/java/com/bandwidth/iris/sdk/OrderTests.java
+++ b/src/test/java/com/bandwidth/iris/sdk/OrderTests.java
@@ -49,6 +49,21 @@ public void testGet() throws Exception {
 
     }
 
+    @Test
+    public void testGetWithCustomClient() throws Exception {
+        String url = "/v1.0/accounts/accountId/orders/someid";
+        stubFor(get(urlMatching(url))
+                .willReturn(aResponse()
+                        .withStatus(200)
+                        .withBody(IrisClientTestUtils.validOrderResponseXml)));
+
+        OrderResponse orderResponse = Order.get(getCustomClient(), "someid");
+        assertEquals(orderResponse.getOrder().getid(), "someid");
+        assertEquals(orderResponse.getOrder().getExistingTelephoneNumberOrderType().getTelephoneNumberList().get(0),
+                "2052865046");
+        assertEquals(orderResponse.getOrder().getName(), "A New Order");
+    }
+
     @Test
     public void testGetError() throws Exception {
         String url = "/v1.0/accounts/accountId/orders/errorid";