diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/error/DefaultErrorWebExceptionHandlerIntegrationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/error/DefaultErrorWebExceptionHandlerIntegrationTests.java
index ba925fcf350..aa31d7f6668 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/error/DefaultErrorWebExceptionHandlerIntegrationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/error/DefaultErrorWebExceptionHandlerIntegrationTests.java
@@ -335,7 +335,7 @@ public class DefaultErrorWebExceptionHandlerIntegrationTests {
 
 			@GetMapping("/commit")
 			public Mono<Void> commit(ServerWebExchange exchange) {
-				return exchange.getResponse().writeWith(Mono.empty()).then(
+				return exchange.getResponse().setComplete().then(
 						Mono.error(new IllegalStateException("already committed!")));
 			}