diff --git a/jetty-proxy/src/test/java/org/eclipse/jetty/proxy/AsyncMiddleManServletTest.java b/jetty-proxy/src/test/java/org/eclipse/jetty/proxy/AsyncMiddleManServletTest.java
index c64d64fb571..a9dbb178f84 100644
--- a/jetty-proxy/src/test/java/org/eclipse/jetty/proxy/AsyncMiddleManServletTest.java
+++ b/jetty-proxy/src/test/java/org/eclipse/jetty/proxy/AsyncMiddleManServletTest.java
@@ -78,6 +78,7 @@ import org.eclipse.jetty.util.log.Logger;
 import org.eclipse.jetty.util.log.StacklessLogging;
 import org.eclipse.jetty.util.thread.QueuedThreadPool;
 import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.OS;
 
@@ -88,6 +89,7 @@ import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+@Disabled("See issue #3974")
 public class AsyncMiddleManServletTest
 {
     private static final Logger LOG = Log.getLogger(AsyncMiddleManServletTest.class);