diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/reactor/TraceReactorAutoConfiguration.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/reactor/TraceReactorAutoConfiguration.java
index 6cc93d508..6845d7204 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/reactor/TraceReactorAutoConfiguration.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/reactor/TraceReactorAutoConfiguration.java
@@ -81,7 +81,7 @@ public class TraceReactorAutoConfiguration {
 		@Bean
 		// for tests
 		@ConditionalOnMissingBean
-		HookRegisteringBeanDefinitionRegistryPostProcessor traceHookRegisteringBeanDefinitionRegistryPostProcessor() {
+		static HookRegisteringBeanDefinitionRegistryPostProcessor traceHookRegisteringBeanDefinitionRegistryPostProcessor() {
 			return new HookRegisteringBeanDefinitionRegistryPostProcessor();
 		}
 	}