diff --git a/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java b/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java
index a7f847e45b..7e1d2e65ec 100644
--- a/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java
+++ b/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java
@@ -35,6 +35,7 @@ import org.springframework.util.MultiValueMap;
 /**
  * Mock implementation of {@link ServerHttpRequest}.
  * @author Rossen Stoyanchev
+ * @since 5.0
  */
 public class MockServerHttpRequest implements ServerHttpRequest {
 
diff --git a/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpResponse.java b/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpResponse.java
index b6df9e6d0c..6ab8116d6c 100644
--- a/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpResponse.java
+++ b/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpResponse.java
@@ -35,6 +35,7 @@ import org.springframework.util.MultiValueMap;
 /**
  * Mock implementation of {@link ServerHttpResponse}.
  * @author Rossen Stoyanchev
+ * @since 5.0
  */
 public class MockServerHttpResponse implements ServerHttpResponse {