diff --git a/apis/ec2/src/main/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParams.java b/apis/ec2/src/main/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParams.java
index cde7812ebd..4a55bffbd4 100644
--- a/apis/ec2/src/main/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParams.java
+++ b/apis/ec2/src/main/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParams.java
@@ -21,6 +21,8 @@ package org.jclouds.ec2.binders;
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 import static java.lang.String.format;
+import static org.jclouds.http.utils.Queries.queryParser;
+import static org.jclouds.io.Payloads.newUrlEncodedFormPayload;
 
 import java.util.Map;
 import java.util.Map.Entry;
@@ -29,9 +31,8 @@ import org.jclouds.ec2.domain.BlockDevice;
 import org.jclouds.http.HttpRequest;
 import org.jclouds.rest.Binder;
 
-import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
 import com.google.common.collect.Multimap;
-import com.google.common.collect.Multimaps;
 
 /**
  * @author Oleksiy Yarmula
@@ -40,28 +41,29 @@ import com.google.common.collect.Multimaps;
 public class BindBlockDeviceMappingToIndexedFormParams implements Binder {
 
    private static final String deviceNamePattern = "BlockDeviceMapping.%d.DeviceName";
-   private static final String volumeIdPattern = "BlockDeviceMapping.%d.Ebs.VolumeId";
    private static final String deleteOnTerminationPattern = "BlockDeviceMapping.%d.Ebs.DeleteOnTermination";
+   private static final String volumeIdPattern = "BlockDeviceMapping.%d.Ebs.VolumeId";
 
    @SuppressWarnings("unchecked")
    @Override
    public <R extends HttpRequest> R bindToRequest(R request, Object input) {
       checkArgument(checkNotNull(input, "input") instanceof Map, "this binder is only valid for Map");
       Map<String, BlockDevice> blockDeviceMapping = (Map<String, BlockDevice>) input;
-
-      ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
+      Multimap<String, String> original = queryParser().apply(request.getPayload().getRawContent().toString());
+      ImmutableMultimap.Builder<String, String> builder = ImmutableMultimap.builder();
+      builder.putAll("Action", "ModifyInstanceAttribute");
       int amazonOneBasedIndex = 1; // according to docs, counters must start with 1
       for (Entry<String, BlockDevice> ebsBlockDeviceName : blockDeviceMapping.entrySet()) {
          // not null by contract
-         builder.put(format(volumeIdPattern, amazonOneBasedIndex), ebsBlockDeviceName.getValue().getVolumeId());
          builder.put(format(deviceNamePattern, amazonOneBasedIndex), ebsBlockDeviceName.getKey());
          builder.put(format(deleteOnTerminationPattern, amazonOneBasedIndex),
                String.valueOf(ebsBlockDeviceName.getValue().isDeleteOnTermination()));
-
+         builder.put(format(volumeIdPattern, amazonOneBasedIndex), ebsBlockDeviceName.getValue().getVolumeId());
          amazonOneBasedIndex++;
       }
-      Multimap<String, String> forms = Multimaps.forMap(builder.build());
-      return forms.size() == 0 ? request : (R) request.toBuilder().replaceFormParams(forms).build();
+      builder.putAll("InstanceId", original.get("InstanceId"));
+      request.setPayload(newUrlEncodedFormPayload(builder.build()));
+      return request;
    }
 
 }
diff --git a/apis/ec2/src/test/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParamsTest.java b/apis/ec2/src/test/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParamsTest.java
index 12ccf98a5e..356b6ed9f4 100644
--- a/apis/ec2/src/test/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParamsTest.java
+++ b/apis/ec2/src/test/java/org/jclouds/ec2/binders/BindBlockDeviceMappingToIndexedFormParamsTest.java
@@ -44,17 +44,18 @@ public class BindBlockDeviceMappingToIndexedFormParamsTest {
    BindBlockDeviceMappingToIndexedFormParams binder = injector
          .getInstance(BindBlockDeviceMappingToIndexedFormParams.class);
 
-   public void testMapping() {
+   public void testMappingOrdersLexicographically() {
       Map<String, BlockDevice> mapping = Maps.newLinkedHashMap();
       mapping.put("apple", new BlockDevice("appleId", true));
       Date date = new Date(999999l);
       mapping.put("cranberry", new BlockDevice("cranberry", Status.ATTACHED, date, false));
 
-      HttpRequest request = HttpRequest.builder().method("POST").endpoint("http://localhost").build();
+      HttpRequest request = HttpRequest.builder().method("POST").endpoint("http://localhost")
+            .addFormParam("InstanceId", "i-foo").build();
       request = binder.bindToRequest(request, mapping);
       assertEquals(
             request.getPayload().getRawContent(),
-            "BlockDeviceMapping.1.Ebs.VolumeId=appleId&BlockDeviceMapping.1.DeviceName=apple&BlockDeviceMapping.1.Ebs.DeleteOnTermination=true&BlockDeviceMapping.2.Ebs.VolumeId=cranberry&BlockDeviceMapping.2.DeviceName=cranberry&BlockDeviceMapping.2.Ebs.DeleteOnTermination=false");
+            "Action=ModifyInstanceAttribute&BlockDeviceMapping.1.DeviceName=apple&BlockDeviceMapping.1.Ebs.DeleteOnTermination=true&BlockDeviceMapping.1.Ebs.VolumeId=appleId&BlockDeviceMapping.2.DeviceName=cranberry&BlockDeviceMapping.2.Ebs.DeleteOnTermination=false&BlockDeviceMapping.2.Ebs.VolumeId=cranberry&InstanceId=i-foo");
    }
 
    @Test(expectedExceptions = IllegalArgumentException.class)
diff --git a/apis/ec2/src/test/java/org/jclouds/ec2/services/InstanceAsyncClientTest.java b/apis/ec2/src/test/java/org/jclouds/ec2/services/InstanceAsyncClientTest.java
index a6a5aca2ee..1b8d8148cd 100644
--- a/apis/ec2/src/test/java/org/jclouds/ec2/services/InstanceAsyncClientTest.java
+++ b/apis/ec2/src/test/java/org/jclouds/ec2/services/InstanceAsyncClientTest.java
@@ -547,6 +547,15 @@ public class InstanceAsyncClientTest extends BaseEC2AsyncClientTest<InstanceAsyn
       checkFilters(request);
    }
 
+   HttpRequest setBlockDeviceMapping = HttpRequest.builder().method("POST")
+                                                           .endpoint("https://ec2.us-east-1.amazonaws.com/")
+                                                           .addHeader("Host", "ec2.us-east-1.amazonaws.com")
+                                                           .addFormParam("Action", "ModifyInstanceAttribute")
+                                                           .addFormParam("BlockDeviceMapping.1.DeviceName", "/dev/sda1")
+                                                           .addFormParam("BlockDeviceMapping.1.Ebs.DeleteOnTermination", "true")
+                                                           .addFormParam("BlockDeviceMapping.1.Ebs.VolumeId", "vol-test1")
+                                                           .addFormParam("InstanceId", "1").build();
+
    public void testSetBlockDeviceMappingForInstanceInRegion() throws SecurityException, NoSuchMethodException,
             IOException {
       Invokable<?, ?> method = method(InstanceAsyncClient.class, "setBlockDeviceMappingForInstanceInRegion", String.class,
@@ -556,20 +565,13 @@ public class InstanceAsyncClientTest extends BaseEC2AsyncClientTest<InstanceAsyn
       mapping.put("/dev/sda1", new BlockDevice("vol-test1", true));
       GeneratedHttpRequest request = processor.createRequest(method, Lists.<Object> newArrayList(null, "1", mapping));
 
+      request = (GeneratedHttpRequest) request.getFilters().get(0).filter(request);
+
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(
-               request,
-               "Action=ModifyInstanceAttribute&InstanceId=1&BlockDeviceMapping.1.Ebs.VolumeId=vol-test1&BlockDeviceMapping.1.DeviceName=/dev/sda1&BlockDeviceMapping.1.Ebs.DeleteOnTermination=true",
-               "application/x-www-form-urlencoded", false);
-      filter.filter(request);// ensure encoding worked properly
-      assertPayloadEquals(
-               request,
-               "Action=ModifyInstanceAttribute&BlockDeviceMapping.1.DeviceName=/dev/sda1&BlockDeviceMapping.1.Ebs.DeleteOnTermination=true&BlockDeviceMapping.1.Ebs.VolumeId=vol-test1&InstanceId=1&Signature=RwY8lVPHSQxQkd5efUKccHdSTkN4OxMIMFiYAe3rrUE%3D&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2009-11-08T15%3A54%3A08.897Z&Version=2010-06-15&AWSAccessKeyId=identity",
-               "application/x-www-form-urlencoded", false);
-      assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
-      assertSaxResponseParserClassEquals(method, null);
-      assertFallbackClassEquals(method, null);
+      assertPayloadEquals(request, filter.filter(setBlockDeviceMapping).getPayload().getRawContent().toString(),
+            "application/x-www-form-urlencoded", false);
+
 
       checkFilters(request);
    }
diff --git a/providers/aws-ec2/src/main/java/org/jclouds/aws/ec2/AWSEC2AsyncClient.java b/providers/aws-ec2/src/main/java/org/jclouds/aws/ec2/AWSEC2AsyncClient.java
index b3ce640953..a20a5dc599 100644
--- a/providers/aws-ec2/src/main/java/org/jclouds/aws/ec2/AWSEC2AsyncClient.java
+++ b/providers/aws-ec2/src/main/java/org/jclouds/aws/ec2/AWSEC2AsyncClient.java
@@ -34,7 +34,7 @@ import org.jclouds.rest.annotations.Delegate;
  * @author Adrian Cole
  */
 public interface AWSEC2AsyncClient extends EC2AsyncClient {
-   public static final String VERSION = "2011-05-15";
+   public static final String VERSION = "2012-06-01";
 
    /**
     * {@inheritDoc}
diff --git a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSAMIAsyncClientTest.java b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSAMIAsyncClientTest.java
index 5fad0ddc19..27bcd113d1 100644
--- a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSAMIAsyncClientTest.java
+++ b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSAMIAsyncClientTest.java
@@ -59,13 +59,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                         .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                         .addFormParam("Action", "CreateImage")
                                         .addFormParam("InstanceId", "instanceId")
-                                        .addFormParam("Name", "name")
-                                        .addFormParam("Signature", "ISQJKjDmhy9Vyc5zKYfkSk%2B2zIu%2Bfm6nc4H0a4mvmcU=")
-                                        .addFormParam("SignatureMethod", "HmacSHA256")
-                                        .addFormParam("SignatureVersion", "2")
-                                        .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                        .addFormParam("Version", "2011-05-15")
-                                        .addFormParam("AWSAccessKeyId", "identity").build();
+                                        .addFormParam("Name", "name").build();
 
    public void testCreateImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "createImageInRegion", String.class, String.class, String.class,
@@ -76,7 +70,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, createImage.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(createImage).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
       assertResponseParserClassEquals(method, request, ParseSax.class);
       assertSaxResponseParserClassEquals(method, ImageIdHandler.class);
@@ -92,13 +86,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                .addFormParam("Description", "description")
                                                .addFormParam("InstanceId", "instanceId")
                                                .addFormParam("Name", "name")
-                                               .addFormParam("NoReboot", "true")
-                                               .addFormParam("Signature", "nEpcd4m4UGl7OUm3sIlknV98HzHRUg4WYd/doIJ9S84=")
-                                               .addFormParam("SignatureMethod", "HmacSHA256")
-                                               .addFormParam("SignatureVersion", "2")
-                                               .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                               .addFormParam("Version", "2011-05-15")
-                                               .addFormParam("AWSAccessKeyId", "identity").build();
+                                               .addFormParam("NoReboot", "true").build();
 
    public void testCreateImageOptions() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "createImageInRegion", String.class, String.class, String.class,
@@ -110,7 +98,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, createImageOptions.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(createImageOptions).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
@@ -123,13 +111,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
    HttpRequest describeImages = HttpRequest.builder().method("POST")
                                            .endpoint("https://ec2.us-east-1.amazonaws.com/")
                                            .addHeader("Host", "ec2.us-east-1.amazonaws.com")
-                                           .addFormParam("Action", "DescribeImages")
-                                           .addFormParam("Signature", "tMg44xaebrZMOYS6EOf2RvvrOEJMacSlNAJaQruj100=")
-                                           .addFormParam("SignatureMethod", "HmacSHA256")
-                                           .addFormParam("SignatureVersion", "2")
-                                           .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                           .addFormParam("Version", "2011-05-15")
-                                           .addFormParam("AWSAccessKeyId", "identity").build();
+                                           .addFormParam("Action", "DescribeImages").build();
 
    public void testDescribeImages() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "describeImagesInRegion", String.class,
@@ -140,7 +122,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, describeImages.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(describeImages).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
@@ -158,13 +140,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                   .addFormParam("ImageId.1", "1")
                                                   .addFormParam("ImageId.2", "2")
                                                   .addFormParam("Owner.1", "fred")
-                                                  .addFormParam("Owner.2", "nancy")
-                                                  .addFormParam("Signature", "WeMm/2znlzxYhwQqbcLr74qXreoQ60WI76T6NKZ071Q=")
-                                                  .addFormParam("SignatureMethod", "HmacSHA256")
-                                                  .addFormParam("SignatureVersion", "2")
-                                                  .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                  .addFormParam("Version", "2011-05-15")
-                                                  .addFormParam("AWSAccessKeyId", "identity").build();
+                                                  .addFormParam("Owner.2", "nancy").build();
 
    public void testDescribeImagesOptions() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "describeImagesInRegion", String.class,
@@ -176,7 +152,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, describeImagesOptions.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(describeImagesOptions).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
@@ -190,13 +166,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                             .endpoint("https://ec2.us-east-1.amazonaws.com/")
                                             .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                             .addFormParam("Action", "DeregisterImage")
-                                            .addFormParam("ImageId", "imageId")
-                                            .addFormParam("Signature", "89plCGzc15vXmjO38/B430Pwz5/Zv6%2BxLwIQivUJIQ8=")
-                                            .addFormParam("SignatureMethod", "HmacSHA256")
-                                            .addFormParam("SignatureVersion", "2")
-                                            .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                            .addFormParam("Version", "2011-05-15")
-                                            .addFormParam("AWSAccessKeyId", "identity").build();
+                                            .addFormParam("ImageId", "imageId").build();
 
    public void testDeregisterImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "deregisterImageInRegion", String.class, String.class);
@@ -206,7 +176,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, deregisterImage.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(deregisterImage).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -221,13 +191,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                       .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                                       .addFormParam("Action", "RegisterImage")
                                                       .addFormParam("ImageLocation", "pathToManifest")
-                                                      .addFormParam("Name", "name")
-                                                      .addFormParam("Signature", "XnUpMvw7tz6PEngDmt%2Bx2XKFFfV1HWg54rxv5DrudrQ=")
-                                                      .addFormParam("SignatureMethod", "HmacSHA256")
-                                                      .addFormParam("SignatureVersion", "2")
-                                                      .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                      .addFormParam("Version", "2011-05-15")
-                                                      .addFormParam("AWSAccessKeyId", "identity").build();
+                                                      .addFormParam("Name", "name").build();
 
    public void testRegisterImageFromManifest() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "registerImageFromManifestInRegion", String.class, String.class,
@@ -238,7 +202,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, registerImageFromManifest.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(registerImageFromManifest).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
       assertResponseParserClassEquals(method, request, ParseSax.class);
       assertSaxResponseParserClassEquals(method, ImageIdHandler.class);
@@ -253,13 +217,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                              .addFormParam("Action", "RegisterImage")
                                                              .addFormParam("Description", "description")
                                                              .addFormParam("ImageLocation", "pathToManifest")
-                                                             .addFormParam("Name", "name")
-                                                             .addFormParam("Signature", "/nJBP27hFsDual7ZRIK8fQsWiNNA8hWaVY7AFIuismE=")
-                                                             .addFormParam("SignatureMethod", "HmacSHA256")
-                                                             .addFormParam("SignatureVersion", "2")
-                                                             .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                             .addFormParam("Version", "2011-05-15")
-                                                             .addFormParam("AWSAccessKeyId", "identity").build();
+                                                             .addFormParam("Name", "name").build();
 
    public void testRegisterImageFromManifestOptions() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "registerImageFromManifestInRegion", String.class, String.class,
@@ -271,8 +229,8 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, registerImageFromManifestOptions.getPayload().getRawContent().toString(),
-            "application/x-www-form-urlencoded", false);
+      assertPayloadEquals(request, filter.filter(registerImageFromManifestOptions).getPayload().getRawContent()
+            .toString(), "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
       assertSaxResponseParserClassEquals(method, ImageIdHandler.class);
@@ -288,13 +246,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                      .addFormParam("BlockDeviceMapping.0.DeviceName", "/dev/sda1")
                                                      .addFormParam("BlockDeviceMapping.0.Ebs.SnapshotId", "snapshotId")
                                                      .addFormParam("Name", "imageName")
-                                                     .addFormParam("RootDeviceName", "/dev/sda1")
-                                                     .addFormParam("Signature", "Pj242OpjbY4NXvaVYzQdjTud4N68NIxQP0oRZtdjd%2BY=")
-                                                     .addFormParam("SignatureMethod", "HmacSHA256")
-                                                     .addFormParam("SignatureVersion", "2")
-                                                     .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                     .addFormParam("Version", "2011-05-15")
-                                                     .addFormParam("AWSAccessKeyId", "identity").build();
+                                                     .addFormParam("RootDeviceName", "/dev/sda1").build();
 
    public void testRegisterImageBackedByEBS() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "registerUnixImageBackedByEbsInRegion", String.class,
@@ -305,7 +257,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, registerImageBackedByEBS.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(registerImageBackedByEBS).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
       assertResponseParserClassEquals(method, request, ParseSax.class);
       assertSaxResponseParserClassEquals(method, ImageIdHandler.class);
@@ -329,13 +281,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                             .addFormParam("BlockDeviceMapping.2.VirtualName", "newblock")
                                                             .addFormParam("Description", "description")
                                                             .addFormParam("Name", "imageName")
-                                                            .addFormParam("RootDeviceName", "/dev/sda1")
-                                                            .addFormParam("Signature", "QGwHRDis98NSU2KU9W52srltVyAQrDtj3MQ5YlzNX3I=")
-                                                            .addFormParam("SignatureMethod", "HmacSHA256")
-                                                            .addFormParam("SignatureVersion", "2")
-                                                            .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                            .addFormParam("Version", "2011-05-15")
-                                                            .addFormParam("AWSAccessKeyId", "identity").build();
+                                                            .addFormParam("RootDeviceName", "/dev/sda1").build();
 
    public void testRegisterImageBackedByEBSOptions() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "registerUnixImageBackedByEbsInRegion", String.class,
@@ -348,8 +294,8 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, registerImageBackedByEBSOptions.getPayload().getRawContent().toString(),
-            "application/x-www-form-urlencoded", false);
+      assertPayloadEquals(request, filter.filter(registerImageBackedByEBSOptions).getPayload().getRawContent()
+            .toString(), "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
       assertSaxResponseParserClassEquals(method, ImageIdHandler.class);
@@ -363,13 +309,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                            .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                                            .addFormParam("Action", "DescribeImageAttribute")
                                                            .addFormParam("Attribute", "blockDeviceMapping")
-                                                           .addFormParam("ImageId", "imageId")
-                                                           .addFormParam("Signature", "aJjRBDJvQ91Zw33%2BLqyhDsfQdWxF2xdN3KlV90pGCb0=")
-                                                           .addFormParam("SignatureMethod", "HmacSHA256")
-                                                           .addFormParam("SignatureVersion", "2")
-                                                           .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                           .addFormParam("Version", "2011-05-15")
-                                                           .addFormParam("AWSAccessKeyId", "identity").build();
+                                                           .addFormParam("ImageId", "imageId").build();
 
    public void testGetBlockDeviceMappingsForImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "getBlockDeviceMappingsForImageInRegion", String.class,
@@ -380,8 +320,8 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, getBlockDeviceMappingsForImage.getPayload().getRawContent().toString(),
-            "application/x-www-form-urlencoded", false);
+      assertPayloadEquals(request, filter.filter(getBlockDeviceMappingsForImage).getPayload().getRawContent()
+            .toString(), "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
       assertSaxResponseParserClassEquals(method, BlockDeviceMappingHandler.class);
@@ -395,13 +335,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                         .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                                         .addFormParam("Action", "DescribeImageAttribute")
                                                         .addFormParam("Attribute", "launchPermission")
-                                                        .addFormParam("ImageId", "imageId")
-                                                        .addFormParam("Signature", "qVRsCNECPCvnU340sv7yLVCDzRYIMGCyAypl4ioWKVU=")
-                                                        .addFormParam("SignatureMethod", "HmacSHA256")
-                                                        .addFormParam("SignatureVersion", "2")
-                                                        .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                        .addFormParam("Version", "2011-05-15")
-                                                        .addFormParam("AWSAccessKeyId", "identity").build();
+                                                        .addFormParam("ImageId", "imageId").build();
 
    public void testGetLaunchPermissionForImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "getLaunchPermissionForImageInRegion", String.class, String.class);
@@ -411,7 +345,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, getLaunchPermissionForImage.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(getLaunchPermissionForImage).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
@@ -428,15 +362,9 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                           .addFormParam("Attribute", "launchPermission")
                                                           .addFormParam("ImageId", "imageId")
                                                           .addFormParam("OperationType", "add")
-                                                          .addFormParam("Signature", "CpCCffn%2BuR5LjbI/iCTl7%2BsrPxbrYEYvVZue%2BmWgRgE=")
-                                                          .addFormParam("SignatureMethod", "HmacSHA256")
-                                                          .addFormParam("SignatureVersion", "2")
-                                                          .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
                                                           .addFormParam("UserGroup.1", "all")
                                                           .addFormParam("UserId.1", "bob")
-                                                          .addFormParam("UserId.2", "sue")
-                                                          .addFormParam("Version", "2011-05-15")
-                                                          .addFormParam("AWSAccessKeyId", "identity").build();
+                                                          .addFormParam("UserId.2", "sue").build();
 
    public void testAddLaunchPermissionsToImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "addLaunchPermissionsToImageInRegion", String.class,
@@ -448,7 +376,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, addLaunchPermission.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(addLaunchPermission).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -465,15 +393,9 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                    .addFormParam("Attribute", "launchPermission")
                                                    .addFormParam("ImageId", "imageId")
                                                    .addFormParam("OperationType", "remove")
-                                                   .addFormParam("Signature", "ScuPcaRhVy/Je%2BXUGIo1mB4IUevDBW/0tAod4FHQQS8=")
-                                                   .addFormParam("SignatureMethod", "HmacSHA256")
-                                                   .addFormParam("SignatureVersion", "2")
-                                                   .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
                                                    .addFormParam("UserGroup.1", "all")
                                                    .addFormParam("UserId.1", "bob")
-                                                   .addFormParam("UserId.2", "sue")
-                                                   .addFormParam("Version", "2011-05-15")
-                                                   .addFormParam("AWSAccessKeyId", "identity").build();
+                                                   .addFormParam("UserId.2", "sue").build();
 
    public void testRemoveLaunchPermissionsFromImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "removeLaunchPermissionsFromImageInRegion", String.class,
@@ -485,7 +407,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, removeLaunchPermission.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(removeLaunchPermission).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
       assertSaxResponseParserClassEquals(method, null);
@@ -499,13 +421,7 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
                                                           .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                                           .addFormParam("Action", "ResetImageAttribute")
                                                           .addFormParam("Attribute", "launchPermission")
-                                                          .addFormParam("ImageId", "imageId")
-                                                          .addFormParam("Signature", "l9F9IalCsYbGGf8O/35lLhttJ4vLLgoZZHUpmCCH9tI=")
-                                                          .addFormParam("SignatureMethod", "HmacSHA256")
-                                                          .addFormParam("SignatureVersion", "2")
-                                                          .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                          .addFormParam("Version", "2011-05-15")
-                                                          .addFormParam("AWSAccessKeyId", "identity").build();
+                                                          .addFormParam("ImageId", "imageId").build();
 
    public void testResetLaunchPermissionsOnImage() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSAMIAsyncClient.class, "resetLaunchPermissionsOnImageInRegion", String.class,
@@ -516,7 +432,8 @@ public class AWSAMIAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSAMIAsync
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, resetLaunchPermissionsOnImage.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request,
+            filter.filter(resetLaunchPermissionsOnImage).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
       assertSaxResponseParserClassEquals(method, null);
diff --git a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSInstanceAsyncClientTest.java b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSInstanceAsyncClientTest.java
index 0f1826882d..d27d1fe3b9 100644
--- a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSInstanceAsyncClientTest.java
+++ b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSInstanceAsyncClientTest.java
@@ -349,13 +349,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
                                                    .addFormParam("Action", "ModifyInstanceAttribute")
                                                    .addFormParam("Attribute", "userData")
                                                    .addFormParam("InstanceId", "1")
-                                                   .addFormParam("Signature", "nArJlrtyAfgqDnXxv%2B2y0r9O%2BIfUcitpQMjfQR0oeRM=")
-                                                   .addFormParam("SignatureMethod", "HmacSHA256")
-                                                   .addFormParam("SignatureVersion", "2")
-                                                   .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                   .addFormParam("Value", "dGVzdA%3D%3D")
-                                                   .addFormParam("Version", "2011-05-15")
-                                                   .addFormParam("AWSAccessKeyId", "identity").build();
+                                                   .addFormParam("Value", "dGVzdA%3D%3D").build();
 
    public void testSetUserDataForInstanceInRegion() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSInstanceAsyncClient.class, "setUserDataForInstanceInRegion", String.class, String.class,
@@ -366,7 +360,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, setUserDataForInstance.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(setUserDataForInstance).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -382,13 +376,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
                                                   .addFormParam("Action", "ModifyInstanceAttribute")
                                                   .addFormParam("Attribute", "ramdisk")
                                                   .addFormParam("InstanceId", "1")
-                                                  .addFormParam("Signature", "y9xr294R57Pjzzafq90Xi2LMi0JKj/Jwy5HL%2BYWyTvo=")
-                                                  .addFormParam("SignatureMethod", "HmacSHA256")
-                                                  .addFormParam("SignatureVersion", "2")
-                                                  .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                  .addFormParam("Value", "test")
-                                                  .addFormParam("Version", "2011-05-15")
-                                                  .addFormParam("AWSAccessKeyId", "identity").build();
+                                                  .addFormParam("Value", "test").build();
 
    public void testSetRamdiskForInstanceInRegion() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSInstanceAsyncClient.class, "setRamdiskForInstanceInRegion", String.class, String.class,
@@ -399,7 +387,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, setRamdiskForInstance.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(setRamdiskForInstance).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -415,13 +403,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
                                                  .addFormParam("Action", "ModifyInstanceAttribute")
                                                  .addFormParam("Attribute", "kernel")
                                                  .addFormParam("InstanceId", "1")
-                                                 .addFormParam("Signature", "vqAuTOcX6i8UfiVGAO/2yz2HHTqZyayiy/SiEU4ySws=")
-                                                 .addFormParam("SignatureMethod", "HmacSHA256")
-                                                 .addFormParam("SignatureVersion", "2")
-                                                 .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                 .addFormParam("Value", "test")
-                                                 .addFormParam("Version", "2011-05-15")
-                                                 .addFormParam("AWSAccessKeyId", "identity").build();
+                                                 .addFormParam("Value", "test").build();
 
    public void testSetKernelForInstanceInRegion() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSInstanceAsyncClient.class, "setKernelForInstanceInRegion", String.class, String.class,
@@ -432,7 +414,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, setKernelForInstance.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(setKernelForInstance).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -448,13 +430,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
                                                       .addFormParam("Action", "ModifyInstanceAttribute")
                                                       .addFormParam("Attribute", "disableApiTermination")
                                                       .addFormParam("InstanceId", "1")
-                                                      .addFormParam("Signature", "tOgWZ2rJ2KDgV55oMEa3RXKHvroiuqZfGfugBCV7ZLk=")
-                                                      .addFormParam("SignatureMethod", "HmacSHA256")
-                                                      .addFormParam("SignatureVersion", "2")
-                                                      .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                      .addFormParam("Value", "true")
-                                                      .addFormParam("Version", "2011-05-15")
-                                                      .addFormParam("AWSAccessKeyId", "identity").build();
+                                                      .addFormParam("Value", "true").build();
 
    public void testSetApiTerminationDisabledForInstanceInRegion() throws SecurityException, NoSuchMethodException,
             IOException {
@@ -466,7 +442,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, setApiTerminationDisabled.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(setApiTerminationDisabled).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -482,13 +458,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
                                                     .addFormParam("Action", "ModifyInstanceAttribute")
                                                     .addFormParam("Attribute", "instanceType")
                                                     .addFormParam("InstanceId", "1")
-                                                    .addFormParam("Signature", "DC1r80OrSLCVcVt/y3gUPWxRWrPK8T96FXjNfmCMwRY=")
-                                                    .addFormParam("SignatureMethod", "HmacSHA256")
-                                                    .addFormParam("SignatureVersion", "2")
-                                                    .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                    .addFormParam("Value", "c1.medium")
-                                                    .addFormParam("Version", "2011-05-15")
-                                                    .addFormParam("AWSAccessKeyId", "identity").build();
+                                                    .addFormParam("Value", "c1.medium").build();
 
    public void testSetInstanceTypeForInstanceInRegion() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSInstanceAsyncClient.class, "setInstanceTypeForInstanceInRegion", String.class,
@@ -499,7 +469,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, instanceTypeForInstance.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(instanceTypeForInstance).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
@@ -515,13 +485,7 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
                                                                  .addFormParam("Action", "ModifyInstanceAttribute")
                                                                  .addFormParam("Attribute", "instanceInitiatedShutdownBehavior")
                                                                  .addFormParam("InstanceId", "1")
-                                                                 .addFormParam("Signature", "HLu0ufuCEUPUrNzjMsmFvjqEFbdawad/7Hufdg9flbc=")
-                                                                 .addFormParam("SignatureMethod", "HmacSHA256")
-                                                                 .addFormParam("SignatureVersion", "2")
-                                                                 .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                                 .addFormParam("Value", "terminate")
-                                                                 .addFormParam("Version", "2011-05-15")
-                                                                 .addFormParam("AWSAccessKeyId", "identity").build();
+                                                                 .addFormParam("Value", "terminate").build();
 
    public void testSetInstanceInitiatedShutdownBehaviorForInstanceInRegion() throws SecurityException,
             NoSuchMethodException, IOException {
@@ -533,8 +497,8 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, setInstanceInitiatedShutdownBehavior.getPayload().getRawContent().toString(),
-            "application/x-www-form-urlencoded", false);
+      assertPayloadEquals(request, filter.filter(setInstanceInitiatedShutdownBehavior).getPayload().getRawContent()
+            .toString(), "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
       assertSaxResponseParserClassEquals(method, null);
@@ -543,6 +507,15 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
       checkFilters(request);
    }
 
+   HttpRequest setBlockDeviceMapping = HttpRequest.builder().method("POST")
+                                                           .endpoint("https://ec2.us-east-1.amazonaws.com/")
+                                                           .addHeader("Host", "ec2.us-east-1.amazonaws.com")
+                                                           .addFormParam("Action", "ModifyInstanceAttribute")
+                                                           .addFormParam("BlockDeviceMapping.1.DeviceName", "/dev/sda1")
+                                                           .addFormParam("BlockDeviceMapping.1.Ebs.DeleteOnTermination", "true")
+                                                           .addFormParam("BlockDeviceMapping.1.Ebs.VolumeId", "vol-test1")
+                                                           .addFormParam("InstanceId", "1").build();
+
    public void testSetBlockDeviceMappingForInstanceInRegion() throws SecurityException, NoSuchMethodException,
          IOException {
       Invokable<?, ?> method = method(AWSInstanceAsyncClient.class, "setBlockDeviceMappingForInstanceInRegion", String.class,
@@ -551,14 +524,12 @@ public class AWSInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSIns
       Map<String, BlockDevice> mapping = Maps.newLinkedHashMap();
       mapping.put("/dev/sda1", new BlockDevice("vol-test1", true));
       GeneratedHttpRequest request = processor.createRequest(method, Lists.<Object> newArrayList(null, "1", mapping));
-      
-      filter.filter(request);
-      
+
+      request = (GeneratedHttpRequest) request.getFilters().get(0).filter(request);
+
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(
-            request,
-            "Action=ModifyInstanceAttribute&BlockDeviceMapping.1.DeviceName=/dev/sda1&BlockDeviceMapping.1.Ebs.DeleteOnTermination=true&BlockDeviceMapping.1.Ebs.VolumeId=vol-test1&InstanceId=1&Signature=qqJpPk8UmhPY9Jica0JSADEZiY3eHf9WETm%2B5tLT0NE%3D&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2009-11-08T15%3A54%3A08.897Z&Version=2011-05-15&AWSAccessKeyId=identity",
+      assertPayloadEquals(request, filter.filter(setBlockDeviceMapping).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
diff --git a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSKeyPairAsyncClientTest.java b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSKeyPairAsyncClientTest.java
index 270ca84132..c780fade3f 100644
--- a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSKeyPairAsyncClientTest.java
+++ b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSKeyPairAsyncClientTest.java
@@ -63,13 +63,7 @@ public class AWSKeyPairAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSKeyP
                                           .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                           .addFormParam("Action", "ImportKeyPair")
                                           .addFormParam("KeyName", "mykey")
-                                          .addFormParam("PublicKeyMaterial", "c3NoLXJzYSBBQQ%3D%3D")
-                                          .addFormParam("Signature", "hI3Y8ggtVzXrEMmHp4Kem2/HCAX9hYN2NKjhDBz9SkY=")
-                                          .addFormParam("SignatureMethod", "HmacSHA256")
-                                          .addFormParam("SignatureVersion", "2")
-                                          .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                          .addFormParam("Version", "2011-05-15")
-                                          .addFormParam("AWSAccessKeyId", "identity").build();
+                                          .addFormParam("PublicKeyMaterial", "c3NoLXJzYSBBQQ%3D%3D").build();
 
    public void testImportKeyPair() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSKeyPairAsyncClient.class, "importKeyPairInRegion", String.class, String.class,
@@ -80,7 +74,7 @@ public class AWSKeyPairAsyncClientTest extends BaseAWSEC2AsyncClientTest<AWSKeyP
 
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, importKeyPair.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(importKeyPair).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ParseSax.class);
diff --git a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSSecurityGroupAsyncClientTest.java b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSSecurityGroupAsyncClientTest.java
index 3defddcbbe..fa1a45a2df 100644
--- a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSSecurityGroupAsyncClientTest.java
+++ b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/AWSSecurityGroupAsyncClientTest.java
@@ -106,13 +106,7 @@ public class AWSSecurityGroupAsyncClientTest extends BaseAWSEC2AsyncClientTest<A
                                                 .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                                 .addFormParam("Action", "CreateSecurityGroup")
                                                 .addFormParam("GroupDescription", "description")
-                                                .addFormParam("GroupName", "name")
-                                                .addFormParam("Signature", "4uhrFtF0ppjWPJU6MUto3iQ8z3e5WKMUuPCE294hrg4=")
-                                                .addFormParam("SignatureMethod", "HmacSHA256")
-                                                .addFormParam("SignatureVersion", "2")
-                                                .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                .addFormParam("Version", "2011-05-15")
-                                                .addFormParam("AWSAccessKeyId", "identity").build();
+                                                .addFormParam("GroupName", "name").build();
 
    public void testCreateSecurityGroup() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(AWSSecurityGroupAsyncClient.class, "createSecurityGroupInRegion", String.class,
@@ -120,10 +114,10 @@ public class AWSSecurityGroupAsyncClientTest extends BaseAWSEC2AsyncClientTest<A
       GeneratedHttpRequest request = processor.createRequest(method, Lists.<Object> newArrayList(null, "name", "description"));
 
       request = (GeneratedHttpRequest) request.getFilters().get(0).filter(request);
-      
+
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, createSecurityGroup.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(createSecurityGroup).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
diff --git a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/PlacementGroupAsyncClientTest.java b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/PlacementGroupAsyncClientTest.java
index a2eb4a03ab..3eaba6060d 100644
--- a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/PlacementGroupAsyncClientTest.java
+++ b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/PlacementGroupAsyncClientTest.java
@@ -64,13 +64,7 @@ public class PlacementGroupAsyncClientTest extends BaseAWSEC2AsyncClientTest<Pla
                                                  .addHeader("Host", "ec2.us-east-1.amazonaws.com")
                                                  .addFormParam("Action", "CreatePlacementGroup")
                                                  .addFormParam("GroupName", "name")
-                                                 .addFormParam("Signature", "V3o3tjvFQfI1zdP4iZJLnlusP3dSpPFx7bJVJlJbs2w=")
-                                                 .addFormParam("SignatureMethod", "HmacSHA256")
-                                                 .addFormParam("SignatureVersion", "2")
-                                                 .addFormParam("Strategy", "cluster")
-                                                 .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                 .addFormParam("Version", "2011-05-15")
-                                                 .addFormParam("AWSAccessKeyId", "identity").build();
+                                                 .addFormParam("Strategy", "cluster").build();
 
    public void testCreatePlacementGroup() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(PlacementGroupAsyncClient.class, "createPlacementGroupInRegion", String.class,
@@ -81,7 +75,7 @@ public class PlacementGroupAsyncClientTest extends BaseAWSEC2AsyncClientTest<Pla
       
       assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
       assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, createPlacementGroup.getPayload().getRawContent().toString(),
+      assertPayloadEquals(request, filter.filter(createPlacementGroup).getPayload().getRawContent().toString(),
             "application/x-www-form-urlencoded", false);
 
       assertResponseParserClassEquals(method, request, ReleasePayloadAndReturn.class);
diff --git a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/SpotInstanceAsyncClientTest.java b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/SpotInstanceAsyncClientTest.java
index 4e34e70265..d5532e0e10 100644
--- a/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/SpotInstanceAsyncClientTest.java
+++ b/providers/aws-ec2/src/test/java/org/jclouds/aws/ec2/services/SpotInstanceAsyncClientTest.java
@@ -25,19 +25,13 @@ import java.util.Date;
 
 import org.jclouds.Fallbacks.EmptySetOnNotFoundOr404;
 import org.jclouds.Fallbacks.VoidOnNotFoundOr404;
-import org.jclouds.aws.ec2.domain.LaunchSpecification;
 import org.jclouds.aws.ec2.options.DescribeSpotPriceHistoryOptions;
-import org.jclouds.aws.ec2.options.RequestSpotInstancesOptions;
 import org.jclouds.aws.ec2.xml.DescribeSpotPriceHistoryResponseHandler;
-import org.jclouds.aws.ec2.xml.SpotInstanceHandler;
-import org.jclouds.aws.ec2.xml.SpotInstancesHandler;
-import org.jclouds.http.HttpRequest;
 import org.jclouds.http.functions.ParseSax;
 import org.jclouds.http.functions.ReleasePayloadAndReturn;
 import org.jclouds.rest.internal.GeneratedHttpRequest;
 import org.testng.annotations.Test;
 
-import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Lists;
 import com.google.common.reflect.Invokable;
 /**
@@ -49,83 +43,6 @@ import com.google.common.reflect.Invokable;
 @Test(groups = "unit", testName = "SpotInstanceAsyncClientTest")
 public class SpotInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<SpotInstanceAsyncClient> {
 
-   HttpRequest requestSpotInstances = HttpRequest.builder().method("POST")
-                                                 .endpoint("https://ec2.us-east-1.amazonaws.com/")
-                                                 .addHeader("Host", "ec2.us-east-1.amazonaws.com")
-                                                 .addFormParam("Action", "RequestSpotInstances")
-                                                 .addFormParam("LaunchSpecification.ImageId", "m1.small")
-                                                 .addFormParam("LaunchSpecification.InstanceType", "ami-voo")
-                                                 .addFormParam("Signature", "5PZRT8xXMugx1ku/NxQpaGWqYLLbKwJksBbeldGLO2s=")
-                                                 .addFormParam("SignatureMethod", "HmacSHA256")
-                                                 .addFormParam("SignatureVersion", "2")
-                                                 .addFormParam("SpotPrice", "0.01")
-                                                 .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                 .addFormParam("Version", "2011-05-15")
-                                                 .addFormParam("AWSAccessKeyId", "identity").build();
-
-   public void testRequestSpotInstance() throws SecurityException, NoSuchMethodException, IOException {
-      Invokable<?, ?> method = method(SpotInstanceAsyncClient.class, "requestSpotInstanceInRegion", String.class,
-            float.class, String.class, String.class);
-      GeneratedHttpRequest request = processor.createRequest(method, Lists.<Object> newArrayList(null, 0.01f, "m1.small", "ami-voo"));
-
-      request = (GeneratedHttpRequest) request.getFilters().get(0).filter(request);
-      
-      assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
-      assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, requestSpotInstances.getPayload().getRawContent().toString(),
-            "application/x-www-form-urlencoded", false);
-
-      assertResponseParserClassEquals(method, request, ParseSax.class);
-      assertSaxResponseParserClassEquals(method, SpotInstanceHandler.class);
-      assertFallbackClassEquals(method, null);
-
-      checkFilters(request);
-   }
-
-   HttpRequest requestSpotInstancesOptions = HttpRequest.builder().method("POST")
-                                                        .endpoint("https://ec2.us-east-1.amazonaws.com/")
-                                                        .addHeader("Host", "ec2.us-east-1.amazonaws.com")
-                                                        .addFormParam("Action", "RequestSpotInstances")
-                                                        .addFormParam("AvailabilityZoneGroup", "availabilityZoneGroup")
-                                                        .addFormParam("InstanceCount", "3")
-                                                        .addFormParam("LaunchGroup", "launchGroup")
-                                                        .addFormParam("LaunchSpecification.ImageId", "ami-voo")
-                                                        .addFormParam("LaunchSpecification.InstanceType", "m1.small")
-                                                        .addFormParam("LaunchSpecification.KernelId", "kernelId")
-                                                        .addFormParam("LaunchSpecification.Placement.AvailabilityZone", "eu-west-1a")
-                                                        .addFormParam("LaunchSpecification.SecurityGroup.1", "group1")
-                                                        .addFormParam("Signature", "94pCsdmfYVMbMzofCeTvfvpQozIY6iDu0LewXvHl1ao=")
-                                                        .addFormParam("SignatureMethod", "HmacSHA256")
-                                                        .addFormParam("SignatureVersion", "2")
-                                                        .addFormParam("SpotPrice", "0.01")
-                                                        .addFormParam("Timestamp", "2009-11-08T15%3A54%3A08.897Z")
-                                                        .addFormParam("ValidFrom", "1970-05-23T21%3A21%3A18Z")
-                                                        .addFormParam("ValidUntil", "2009-02-13T23%3A31%3A31Z")
-                                                        .addFormParam("Version", "2011-05-15")
-                                                        .addFormParam("AWSAccessKeyId", "identity").build();
-
-   public void testRequestSpotInstancesOptions() throws SecurityException, NoSuchMethodException, IOException {
-      Invokable<?, ?> method = method(SpotInstanceAsyncClient.class, "requestSpotInstancesInRegion", String.class,
-            float.class, int.class, LaunchSpecification.class, RequestSpotInstancesOptions[].class);
-      GeneratedHttpRequest request = processor.createRequest(method, ImmutableList.<Object> of("eu-west-1", 0.01, 3,
-            LaunchSpecification.builder().instanceType("m1.small").imageId("ami-voo").availabilityZone("eu-west-1a")
-                  .kernelId("kernelId").securityGroupName("group1").build(), new RequestSpotInstancesOptions().validFrom(from)
-                  .validUntil(to).availabilityZoneGroup("availabilityZoneGroup").launchGroup("launchGroup")));
-
-      request = (GeneratedHttpRequest) request.getFilters().get(0).filter(request);
-      
-      assertRequestLineEquals(request, "POST https://ec2.eu-west-1.amazonaws.com/ HTTP/1.1");
-      assertNonPayloadHeadersEqual(request, "Host: ec2.eu-west-1.amazonaws.com\n");
-      assertPayloadEquals(request, requestSpotInstancesOptions.getPayload().getRawContent().toString(),
-            "application/x-www-form-urlencoded", false);
-
-      assertResponseParserClassEquals(method, request, ParseSax.class);
-      assertSaxResponseParserClassEquals(method, SpotInstancesHandler.class);
-      assertFallbackClassEquals(method, null);
-
-      checkFilters(request);
-   }
-
    public void testCancelSpotInstanceRequests() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(SpotInstanceAsyncClient.class, "cancelSpotInstanceRequestsInRegion", String.class,
             String[].class);
@@ -143,42 +60,6 @@ public class SpotInstanceAsyncClientTest extends BaseAWSEC2AsyncClientTest<SpotI
       checkFilters(request);
    }
 
-   public void testDescribeSpotInstanceRequests() throws SecurityException, NoSuchMethodException, IOException {
-      Invokable<?, ?> method = method(SpotInstanceAsyncClient.class, "describeSpotInstanceRequestsInRegion", String.class,
-            String[].class);
-      GeneratedHttpRequest request = processor.createRequest(method, Lists.<Object> newArrayList((String) null));
-
-      assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
-      assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(request, "Action=DescribeSpotInstanceRequests",
-            "application/x-www-form-urlencoded", false);
-
-      assertResponseParserClassEquals(method, request, ParseSax.class);
-      assertSaxResponseParserClassEquals(method, SpotInstancesHandler.class);
-      assertFallbackClassEquals(method, EmptySetOnNotFoundOr404.class);
-
-      checkFilters(request);
-   }
-
-   public void testDescribeSpotInstanceRequestsArgs() throws SecurityException, NoSuchMethodException, IOException {
-      Invokable<?, ?> method = method(SpotInstanceAsyncClient.class, "describeSpotInstanceRequestsInRegion", String.class,
-            String[].class);
-      GeneratedHttpRequest request = processor.createRequest(method, Lists.<Object> newArrayList(null, "1", "2"));
-
-      assertRequestLineEquals(request, "POST https://ec2.us-east-1.amazonaws.com/ HTTP/1.1");
-      assertNonPayloadHeadersEqual(request, "Host: ec2.us-east-1.amazonaws.com\n");
-      assertPayloadEquals(
-            request,
-            "Action=DescribeSpotInstanceRequests&SpotInstanceRequestId.1=1&SpotInstanceRequestId.2=2",
-            "application/x-www-form-urlencoded", false);
-
-      assertResponseParserClassEquals(method, request, ParseSax.class);
-      assertSaxResponseParserClassEquals(method, SpotInstancesHandler.class);
-      assertFallbackClassEquals(method, EmptySetOnNotFoundOr404.class);
-
-      checkFilters(request);
-   }
-
    public void testDescribeSpotPriceHistory() throws SecurityException, NoSuchMethodException, IOException {
       Invokable<?, ?> method = method(SpotInstanceAsyncClient.class, "describeSpotPriceHistoryInRegion", String.class,
             DescribeSpotPriceHistoryOptions[].class);