diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientObservationTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientObservationTests.java
index f42efc97f3..0ae81818c4 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientObservationTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/function/client/WebClientObservationTests.java
@@ -53,7 +53,6 @@ import static org.mockito.Mockito.when;
  */
 class WebClientObservationTests {
 
-
 	private final TestObservationRegistry observationRegistry = TestObservationRegistry.create();
 
 	private final ExchangeFunction exchangeFunction = mock();
@@ -63,6 +62,7 @@ class WebClientObservationTests {
 	private WebClient.Builder builder;
 
 	@BeforeEach
+	@SuppressWarnings("unchecked")
 	void setup() {
 		Hooks.enableAutomaticContextPropagation();
 		ClientResponse mockResponse = mock();