diff --git a/services/acm/pom.xml b/services/acm/pom.xml
index 97c86ba93ace..8f6b4ea0cd21 100644
--- a/services/acm/pom.xml
+++ b/services/acm/pom.xml
@@ -61,5 +61,11 @@
             <artifactId>http-auth-aws</artifactId>
             <version>${awsjavasdk.version}</version>
         </dependency>
+        <dependency>
+            <groupId>software.amazon.awssdk</groupId>
+            <artifactId>auth-crt</artifactId>
+            <version>${awsjavasdk.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 </project>
diff --git a/services/acm/src/it/java/software/amazon/awssdk/services/acm/AwsCertficateManagerIntegrationTest.java b/services/acm/src/it/java/software/amazon/awssdk/services/acm/AwsCertficateManagerIntegrationTest.java
index fc281388891c..32be1c442233 100644
--- a/services/acm/src/it/java/software/amazon/awssdk/services/acm/AwsCertficateManagerIntegrationTest.java
+++ b/services/acm/src/it/java/software/amazon/awssdk/services/acm/AwsCertficateManagerIntegrationTest.java
@@ -19,6 +19,8 @@
 import org.junit.BeforeClass;
 import org.junit.Test;
 import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
+import software.amazon.awssdk.authcrt.signer.AwsCrtV4aSigner;
+import software.amazon.awssdk.core.client.config.SdkAdvancedClientOption;
 import software.amazon.awssdk.services.acm.model.AcmException;
 import software.amazon.awssdk.services.acm.model.GetCertificateRequest;
 import software.amazon.awssdk.services.acm.model.ListCertificatesRequest;
@@ -40,6 +42,17 @@ public void list_certificates() {
         Assert.assertTrue(result.certificateSummaryList().size() >= 0);
     }
 
+    @Test
+    public void list_certificates_using_oldSigv4aSigner() {
+        AcmClient client = AcmClient.builder()
+                                    .credentialsProvider(StaticCredentialsProvider.create(getCredentials()))
+                                    .overrideConfiguration(c -> c.putAdvancedOption(SdkAdvancedClientOption.SIGNER,
+                                                                                    AwsCrtV4aSigner.create()))
+                                    .build();
+        ListCertificatesResponse result = client.listCertificates(ListCertificatesRequest.builder().build());
+        Assert.assertTrue(result.certificateSummaryList().size() >= 0);
+    }
+
     /**
      * Ideally the service must be throwing a Invalid Arn exception
      * instead of SdkServiceException. Have reported this to service to
diff --git a/services/acm/src/it/resources/log4j2.properties b/services/acm/src/it/resources/log4j2.properties
new file mode 100644
index 000000000000..e5e68dd2faa4
--- /dev/null
+++ b/services/acm/src/it/resources/log4j2.properties
@@ -0,0 +1,38 @@
+#
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License").
+# You may not use this file except in compliance with the License.
+# A copy of the License is located at
+#
+#  http://aws.amazon.com/apache2.0
+#
+# or in the "license" file accompanying this file. This file 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.
+#
+
+status = warn
+
+appender.console.type = Console
+appender.console.name = ConsoleAppender
+appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = %d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n%throwable
+
+rootLogger.level = info
+rootLogger.appenderRef.stdout.ref = ConsoleAppender
+
+# Uncomment below to enable more specific logging
+#
+#logger.sdk.name = software.amazon.awssdk
+#logger.sdk.level = debug
+#
+#logger.request.name = software.amazon.awssdk.request
+#logger.request.level = debug
+#
+#logger.apache.name = org.apache.http.wire
+#logger.apache.level = debug
+#
+#logger.netty.name = io.netty.handler.logging
+#logger.netty.level = debug