diff --git a/src/main/java/org/springframework/data/redis/core/RedisKeyValueAdapter.java b/src/main/java/org/springframework/data/redis/core/RedisKeyValueAdapter.java
index 720e75fee..4cac1d460 100644
--- a/src/main/java/org/springframework/data/redis/core/RedisKeyValueAdapter.java
+++ b/src/main/java/org/springframework/data/redis/core/RedisKeyValueAdapter.java
@@ -869,7 +869,7 @@ public class RedisKeyValueAdapter extends AbstractKeyValueAdapter
 	 * publishing {@link RedisKeyspaceEvent}.
 	 *
 	 * @author Christoph Strobl
-	 * @since 2.3
+	 * @since 2.4
 	 */
 	public enum ShadowCopy {
 
@@ -900,8 +900,8 @@ public class RedisKeyValueAdapter extends AbstractKeyValueAdapter
 		private final Object targetId;
 		private final byte[] targetKey;
 
-		private Set<byte[]> fieldsToRemove = new LinkedHashSet<>();
-		private Set<Index> indexesToUpdate = new LinkedHashSet<>();
+		private final Set<byte[]> fieldsToRemove = new LinkedHashSet<>();
+		private final Set<Index> indexesToUpdate = new LinkedHashSet<>();
 
 		RedisUpdateObject(byte[] targetKey, String keyspace, Object targetId) {
 
diff --git a/src/main/java/org/springframework/data/redis/repository/configuration/EnableRedisRepositories.java b/src/main/java/org/springframework/data/redis/repository/configuration/EnableRedisRepositories.java
index 66e9f94b4..eae924416 100644
--- a/src/main/java/org/springframework/data/redis/repository/configuration/EnableRedisRepositories.java
+++ b/src/main/java/org/springframework/data/redis/repository/configuration/EnableRedisRepositories.java
@@ -170,9 +170,9 @@ public @interface EnableRedisRepositories {
 	/**
 	 * Configuration flag controlling storage of phantom keys (shadow copies) of expiring entities to read them later when
 	 * publishing {@link org.springframework.data.redis.core.RedisKeyspaceEvent keyspace events}.
-	 * 
+	 *
 	 * @return
-	 * @since 2.3
+	 * @since 2.4
 	 */
 	ShadowCopy shadowCopy() default ShadowCopy.DEFAULT;
 
diff --git a/src/test/java/org/springframework/data/redis/core/RedisKeyValueAdapterTests.java b/src/test/java/org/springframework/data/redis/core/RedisKeyValueAdapterTests.java
index 819cfe03b..cf2e9df8b 100644
--- a/src/test/java/org/springframework/data/redis/core/RedisKeyValueAdapterTests.java
+++ b/src/test/java/org/springframework/data/redis/core/RedisKeyValueAdapterTests.java
@@ -58,6 +58,8 @@ import org.springframework.data.redis.core.index.Indexed;
 import org.springframework.data.redis.core.mapping.RedisMappingContext;
 
 /**
+ * Integration tests for {@link RedisKeyValueAdapter}.
+ *
  * @author Christoph Strobl
  * @author Mark Paluch
  */