diff --git a/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/RestTemplateSenderTest.java b/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/RestTemplateSenderTest.java
index ff8d94bcd..f8db45448 100644
--- a/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/RestTemplateSenderTest.java
+++ b/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/RestTemplateSenderTest.java
@@ -27,7 +27,7 @@ import static zipkin2.codec.SpanBytesEncoder.PROTO3;
 
 class RestTemplateSenderTest extends AbstractSenderTest {
 
-	public static final int DEFAULT_CHECK_TIMEOUT = 400;
+	public static final int DEFAULT_CHECK_TIMEOUT = 1_000;
 
 	@Override
 	Sender jsonSender() {
diff --git a/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/WebClientSenderTests.java b/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/WebClientSenderTests.java
index 6703a4466..40a7270f7 100644
--- a/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/WebClientSenderTests.java
+++ b/spring-cloud-sleuth-zipkin/src/test/java/org/springframework/cloud/sleuth/zipkin2/WebClientSenderTests.java
@@ -26,7 +26,7 @@ import static zipkin2.codec.SpanBytesEncoder.PROTO3;
 
 class WebClientSenderTests extends AbstractSenderTest {
 
-	public static final int DEFAULT_CHECK_TIMEOUT = 400;
+	public static final int DEFAULT_CHECK_TIMEOUT = 1_000;
 
 	@Override
 	Sender jsonSender() {