diff --git a/spring-web/src/main/java/org/springframework/http/codec/xml/Jaxb2XmlEncoder.java b/spring-web/src/main/java/org/springframework/http/codec/xml/Jaxb2XmlEncoder.java
index 150ad691f2..b29b610bb5 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/xml/Jaxb2XmlEncoder.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/xml/Jaxb2XmlEncoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,6 +39,7 @@ import org.springframework.core.io.buffer.DataBuffer;
 import org.springframework.core.io.buffer.DataBufferFactory;
 import org.springframework.core.io.buffer.DataBufferUtils;
 import org.springframework.core.log.LogFormatUtils;
+import org.springframework.http.MediaType;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.MimeType;
@@ -64,7 +65,7 @@ public class Jaxb2XmlEncoder extends AbstractSingleValueEncoder<Object> {
 
 
 	public Jaxb2XmlEncoder() {
-		super(MimeTypeUtils.APPLICATION_XML, MimeTypeUtils.TEXT_XML);
+		super(MimeTypeUtils.APPLICATION_XML, MimeTypeUtils.TEXT_XML, new MediaType("application", "*+xml"));
 	}
 
 
diff --git a/spring-web/src/test/java/org/springframework/http/codec/xml/Jaxb2XmlEncoderTests.java b/spring-web/src/test/java/org/springframework/http/codec/xml/Jaxb2XmlEncoderTests.java
index 8c22f80956..a32a3f727e 100644
--- a/spring-web/src/test/java/org/springframework/http/codec/xml/Jaxb2XmlEncoderTests.java
+++ b/spring-web/src/test/java/org/springframework/http/codec/xml/Jaxb2XmlEncoderTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ import org.springframework.web.testfixture.xml.Pojo;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.core.ResolvableType.forClass;
 import static org.springframework.core.io.buffer.DataBufferUtils.release;
 
 /**
@@ -52,19 +53,13 @@ public class Jaxb2XmlEncoderTests extends AbstractEncoderTests<Jaxb2XmlEncoder>
 	@Override
 	@Test
 	public void canEncode() {
-		assertThat(this.encoder.canEncode(ResolvableType.forClass(Pojo.class),
-		MediaType.APPLICATION_XML)).isTrue();
-		assertThat(this.encoder.canEncode(ResolvableType.forClass(Pojo.class),
-		MediaType.TEXT_XML)).isTrue();
-		assertThat(this.encoder.canEncode(ResolvableType.forClass(Pojo.class),
-		MediaType.APPLICATION_JSON)).isFalse();
+		assertThat(this.encoder.canEncode(forClass(Pojo.class), MediaType.APPLICATION_XML)).isTrue();
+		assertThat(this.encoder.canEncode(forClass(Pojo.class), MediaType.TEXT_XML)).isTrue();
+		assertThat(this.encoder.canEncode(forClass(Pojo.class), new MediaType("application", "foo+xml"))).isTrue();
+		assertThat(this.encoder.canEncode(forClass(Pojo.class), MediaType.APPLICATION_JSON)).isFalse();
 
-		assertThat(this.encoder.canEncode(
-		ResolvableType.forClass(Jaxb2XmlDecoderTests.TypePojo.class),
-		MediaType.APPLICATION_XML)).isTrue();
-
-		assertThat(this.encoder.canEncode(ResolvableType.forClass(getClass()),
-		MediaType.APPLICATION_XML)).isFalse();
+		assertThat(this.encoder.canEncode(forClass(Jaxb2XmlDecoderTests.TypePojo.class), MediaType.APPLICATION_XML)).isTrue();
+		assertThat(this.encoder.canEncode(forClass(getClass()), MediaType.APPLICATION_XML)).isFalse();
 
 		// SPR-15464
 		assertThat(this.encoder.canEncode(ResolvableType.NONE, null)).isFalse();