diff --git a/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/TraceWebFluxTests.java b/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/TraceWebFluxTests.java
index 2558358fc..7add587e7 100644
--- a/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/TraceWebFluxTests.java
+++ b/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/TraceWebFluxTests.java
@@ -24,6 +24,7 @@ import org.slf4j.MDC;
 import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration;
+import org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.cloud.sleuth.instrument.web.client.TraceWebClientAutoConfiguration;
 import org.springframework.cloud.sleuth.util.ArrayListSpanReporter;
@@ -77,6 +78,7 @@ public class TraceWebFluxTests {
 	@Configuration
 	@EnableAutoConfiguration(
 			exclude = { TraceWebClientAutoConfiguration.class,
+					ReactiveUserDetailsServiceAutoConfiguration.class,
 					ReactiveSecurityAutoConfiguration.class })
 	static class Config {