diff --git a/providers/trmk-ecloud/pom.xml b/providers/trmk-ecloud/pom.xml
index 963f4359c0..10aae58cd8 100644
--- a/providers/trmk-ecloud/pom.xml
+++ b/providers/trmk-ecloud/pom.xml
@@ -78,6 +78,11 @@
             <type>test-jar</type>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.google.mockwebserver</groupId>
+            <artifactId>mockwebserver</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.jclouds.driver</groupId>
             <artifactId>jclouds-log4j</artifactId>
diff --git a/providers/trmk-ecloud/src/test/java/org/jclouds/trmk/ecloud/TerremarkECloudClientMockTest.java b/providers/trmk-ecloud/src/test/java/org/jclouds/trmk/ecloud/TerremarkECloudClientMockTest.java
new file mode 100644
index 0000000000..8da4e8f29f
--- /dev/null
+++ b/providers/trmk-ecloud/src/test/java/org/jclouds/trmk/ecloud/TerremarkECloudClientMockTest.java
@@ -0,0 +1,123 @@
+/**
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.jclouds.trmk.ecloud;
+
+import static com.google.common.util.concurrent.MoreExecutors.sameThreadExecutor;
+import static org.jclouds.Constants.PROPERTY_MAX_RETRIES;
+import static org.testng.Assert.assertEquals;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.atomic.AtomicReference;
+
+import org.jclouds.ContextBuilder;
+import org.jclouds.concurrent.config.ExecutorServiceModule;
+import org.testng.annotations.Test;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.inject.Module;
+import com.google.mockwebserver.MockResponse;
+import com.google.mockwebserver.MockWebServer;
+import com.google.mockwebserver.QueueDispatcher;
+import com.google.mockwebserver.RecordedRequest;
+
+/**
+ * 
+ * @author Adrian Cole
+ */
+@Test(singleThreaded = true)
+public class TerremarkECloudClientMockTest {
+   
+   private static final Set<Module> modules = ImmutableSet.<Module> of(
+         new ExecutorServiceModule(sameThreadExecutor(), sameThreadExecutor()));
+
+   static TerremarkECloudClient mockTerremarkECloudClient(String uri) {
+      Properties overrides = new Properties();
+      overrides.setProperty(PROPERTY_MAX_RETRIES, "1");
+      return ContextBuilder.newBuilder("trmk-ecloud")
+                           .credentials("user", "password")
+                           .endpoint(uri)
+                           .overrides(overrides)
+                           .modules(modules)
+                           .build(TerremarkECloudApiMetadata.CONTEXT_TOKEN).getApi();
+   }
+
+   String versionXML = "<SupportedVersions><VersionInfo><Version>0.8b-ext2.8</Version><LoginUrl>URLv0.8/login</LoginUrl></VersionInfo></SupportedVersions>";
+
+   @Test
+   public void testLoginSetsContentLength() throws IOException, InterruptedException {
+      MockWebServer server = new MockWebServer();
+      AtomicReference<URL> url = setURLReplacingDispatcher(server);
+      server.enqueue(new MockResponse().setResponseCode(200).setBody(versionXML));
+      server.enqueue(new MockResponse().setResponseCode(200)
+                                       .addHeader("x-vcloud-authorization", "cookie")
+                                       .setBody("<OrgList />"));
+      server.play();
+      url.set(server.getUrl("/"));
+
+      TerremarkECloudClient api = mockTerremarkECloudClient(url.get().toString());
+
+      try {
+         api.listOrgs();
+      } finally {
+         RecordedRequest getVersions = server.takeRequest();
+         assertEquals(getVersions.getRequestLine(), "GET /versions HTTP/1.1");
+
+         RecordedRequest login = server.takeRequest();
+         assertEquals(login.getRequestLine(), "POST /v0.8/login HTTP/1.1");
+         assertEquals(login.getHeader("Authorization"), "Basic dXNlcjpwYXNzd29yZA==");
+         assertEquals(login.getHeader("Content-Length"), "0");
+
+         server.shutdown();
+      }
+   }
+
+   /**
+    * there's no built-in way to defer evaluation of a response body, hence this
+    * method, which allows us to send back links to the mock server.
+    */
+   private AtomicReference<URL> setURLReplacingDispatcher(MockWebServer server) {
+      final AtomicReference<URL> url = new AtomicReference<URL>();
+
+      final QueueDispatcher dispatcher = new QueueDispatcher() {
+         protected final BlockingQueue<MockResponse> responseQueue = new LinkedBlockingQueue<MockResponse>();
+
+         @Override
+         public MockResponse dispatch(RecordedRequest request) throws InterruptedException {
+            MockResponse response = responseQueue.take();
+            if (response.getBody() != null) {
+               String newBody = new String(response.getBody()).replace("URL", url.get().toString());
+               response = response.setBody(newBody);
+            }
+            return response;
+         }
+
+         @Override
+         public void enqueueResponse(MockResponse response) {
+            responseQueue.add(response);
+         }
+      };
+      server.setDispatcher(dispatcher);
+      return url;
+   }
+}