diff --git a/spring-web-reactive/src/test/java/org/springframework/http/server/reactive/AsyncIntegrationTests.java b/spring-web-reactive/src/test/java/org/springframework/http/server/reactive/AsyncIntegrationTests.java
index a0efb8968b..8b36948a9c 100644
--- a/spring-web-reactive/src/test/java/org/springframework/http/server/reactive/AsyncIntegrationTests.java
+++ b/spring-web-reactive/src/test/java/org/springframework/http/server/reactive/AsyncIntegrationTests.java
@@ -17,6 +17,7 @@
 package org.springframework.http.server.reactive;
 
 import java.net.URI;
+import java.time.Duration;
 
 import org.hamcrest.Matchers;
 import org.junit.Test;
@@ -65,7 +66,7 @@ public class AsyncIntegrationTests extends AbstractHttpHandlerIntegrationTests {
 		public Mono<Void> handle(ServerHttpRequest request, ServerHttpResponse response) {
 			return response.setBody(Fluxion.just("h", "e", "l", "l", "o")
 			                              .useTimer(Timer.global())
-			                              .delay(1)
+			                              .delay(Duration.ofMillis(100))
 			                              .dispatchOn(asyncGroup)
 			                              .collect(allocator::allocateBuffer,
 			                               (buffer, str) -> buffer.write(str.getBytes())));
diff --git a/spring-web-reactive/src/test/java/org/springframework/web/reactive/method/annotation/RequestMappingIntegrationTests.java b/spring-web-reactive/src/test/java/org/springframework/web/reactive/method/annotation/RequestMappingIntegrationTests.java
index 39b6057fe4..5e06c13dca 100644
--- a/spring-web-reactive/src/test/java/org/springframework/web/reactive/method/annotation/RequestMappingIntegrationTests.java
+++ b/spring-web-reactive/src/test/java/org/springframework/web/reactive/method/annotation/RequestMappingIntegrationTests.java
@@ -18,6 +18,7 @@ package org.springframework.web.reactive.method.annotation;
 
 import java.net.URI;
 import java.nio.ByteBuffer;
+import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -491,7 +492,7 @@ public class RequestMappingIntegrationTests extends AbstractHttpHandlerIntegrati
 
 		@RequestMapping("/stream-result")
 		public Publisher<Long> stringStreamResponseBody() {
-			return Flux.interval(1).as(Fluxion::from).take(5);
+			return Flux.interval(Duration.ofSeconds(1)).as(Fluxion::from).take(5);
 		}
 
 		@RequestMapping("/raw-flux")