diff --git a/akka-http-core/src/test/scala/akka/http/impl/engine/server/HttpServerSpec.scala b/akka-http-core/src/test/scala/akka/http/impl/engine/server/HttpServerSpec.scala
index dbb3adc141..8444112ee3 100644
--- a/akka-http-core/src/test/scala/akka/http/impl/engine/server/HttpServerSpec.scala
+++ b/akka-http-core/src/test/scala/akka/http/impl/engine/server/HttpServerSpec.scala
@@ -811,7 +811,7 @@ class HttpServerSpec extends AkkaSpec(
         (System.nanoTime() - mark) should be < (40 * 1000000L)
       }
 
-      "have a programmatically set timeout handler" in new RequestTimeoutTestSetup(10.millis) {
+      "have a programmatically set timeout handler" in new RequestTimeoutTestSetup(400.millis) {
         send("GET / HTTP/1.1\r\nHost: example.com\r\n\r\n")
         val timeoutResponse = HttpResponse(StatusCodes.InternalServerError, entity = "OOPS!")
         expectRequest().header[`Timeout-Access`].foreach(_.timeoutAccess.updateHandler(_ ⇒ timeoutResponse))