diff --git a/spring-web/src/main/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolver.java b/spring-web/src/main/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolver.java
index e223451d50..ac5569ab4b 100644
--- a/spring-web/src/main/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolver.java
+++ b/spring-web/src/main/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolver.java
@@ -95,7 +95,8 @@ public class MappingMediaTypeFileExtensionResolver implements MediaTypeFileExten
 	}
 
 	/**
-	 * Use this method for a reverse lookup from extension to MediaType.
+	 * Use this method for a reverse, case-insensitive MediaType lookup.
+	 * @param extension the extension to look up
 	 * @return a MediaType for the key or {@code null}
 	 */
 	protected MediaType lookupMediaType(String extension) {
diff --git a/spring-web/src/test/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolverTests.java b/spring-web/src/test/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolverTests.java
index a46c06a288..a999b9995b 100644
--- a/spring-web/src/test/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolverTests.java
+++ b/spring-web/src/test/java/org/springframework/web/accept/MappingMediaTypeFileExtensionResolverTests.java
@@ -51,12 +51,8 @@ public class MappingMediaTypeFileExtensionResolverTests {
 		assertTrue(extensions.isEmpty());
 	}
 
-	/**
-	 * Unit test for SPR-13747 - ensures that reverse lookup of media type from media
-	 * type key is case-insensitive.
-	 * 
-	 * @author Melissa Hartsock
-	 */
+	// SPR-13747
+
 	@Test
 	public void lookupMediaTypeCaseInsensitive() {
 		Map<String, MediaType> mapping = Collections.singletonMap("json", MediaType.APPLICATION_JSON);