diff --git a/http-clients/url-connection-client/src/main/java/software/amazon/awssdk/http/urlconnection/UrlConnectionHttpClient.java b/http-clients/url-connection-client/src/main/java/software/amazon/awssdk/http/urlconnection/UrlConnectionHttpClient.java
index 8268cd3bfb60..e4bde8ffd958 100644
--- a/http-clients/url-connection-client/src/main/java/software/amazon/awssdk/http/urlconnection/UrlConnectionHttpClient.java
+++ b/http-clients/url-connection-client/src/main/java/software/amazon/awssdk/http/urlconnection/UrlConnectionHttpClient.java
@@ -152,7 +152,7 @@ public String clientName() {
     private HttpURLConnection createAndConfigureConnection(HttpExecuteRequest request) {
         SdkHttpRequest sdkHttpRequest = request.httpRequest();
         HttpURLConnection connection = connectionFactory.createConnection(sdkHttpRequest.getUri());
-        setHeaders(connection, sdkHttpRequest);
+        sdkHttpRequest.forEachHeader((key, values) -> values.forEach(value -> connection.setRequestProperty(key, value)));
 
         // connection.setRequestProperty("Transfer-Encoding", "chunked") does not work, i.e., property does not get set
         if (sdkHttpRequest.matchingHeaders("Transfer-Encoding").contains("chunked")) {
@@ -180,13 +180,6 @@ private HttpURLConnection createAndConfigureConnection(HttpExecuteRequest reques
         return connection;
     }
 
-    private void setHeaders(HttpURLConnection connection, SdkHttpRequest request) {
-        request.forEachHeader((name, values) -> {
-            String commaSeparated = String.join(",", values);
-            connection.addRequestProperty(name, commaSeparated);
-        });
-    }
-
     private HttpURLConnection createDefaultConnection(URI uri, SSLSocketFactory socketFactory) {
 
         Optional<Proxy> proxy = determineProxy(uri);
diff --git a/http-clients/url-connection-client/src/test/java/software/amazon/awssdk/http/urlconnection/HeadersListTest.java b/http-clients/url-connection-client/src/test/java/software/amazon/awssdk/http/urlconnection/HeadersListTest.java
deleted file mode 100644
index 2361fa735fe6..000000000000
--- a/http-clients/url-connection-client/src/test/java/software/amazon/awssdk/http/urlconnection/HeadersListTest.java
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * 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.
- */
-
-package software.amazon.awssdk.http.urlconnection;
-
-import static com.github.tomakehurst.wiremock.client.WireMock.equalTo;
-import static com.github.tomakehurst.wiremock.client.WireMock.putRequestedFor;
-import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
-
-import com.github.tomakehurst.wiremock.WireMockServer;
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.util.Arrays;
-import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.Test;
-import software.amazon.awssdk.http.ContentStreamProvider;
-import software.amazon.awssdk.http.HttpExecuteRequest;
-import software.amazon.awssdk.http.SdkHttpClient;
-import software.amazon.awssdk.http.SdkHttpFullRequest;
-import software.amazon.awssdk.http.SdkHttpMethod;
-
-public class HeadersListTest {
-    private static final WireMockServer WIRE_MOCK = new WireMockServer(0);
-    private static SdkHttpClient client;
-
-    @BeforeAll
-    public static void setup() {
-        WIRE_MOCK.start();
-        client = UrlConnectionHttpClient.create();
-    }
-
-    @AfterAll
-    public static void teardown() {
-        client.close();
-        WIRE_MOCK.stop();
-    }
-
-    @Test
-    public void execute_requestHeaderHasMultipleValues_allValuesSent() throws IOException {
-        ContentStreamProvider provider = () -> new ByteArrayInputStream(new byte[0]);
-        SdkHttpFullRequest httpRequest = SdkHttpFullRequest.builder()
-                                                           .method(SdkHttpMethod.PUT)
-                                                           .host("localhost")
-                                                           .port(WIRE_MOCK.port())
-                                                           .protocol("http")
-                                                           .putHeader("my-header", Arrays.asList("value1", "value2"))
-                                                           .encodedPath("/test")
-                                                           .build();
-
-        HttpExecuteRequest request = HttpExecuteRequest.builder()
-                                                       .request(httpRequest)
-                                                       .contentStreamProvider(provider)
-                                                       .build();
-
-        client.prepareRequest(request).call();
-
-        WIRE_MOCK.verify(putRequestedFor(urlEqualTo("/test"))
-                             .withHeader("my-header", equalTo("value1,value2")));
-    }
-}