diff --git a/httpclient/src/test/java/org/apache/http/localserver/LocalTestServer.java b/httpclient/src/test/java/org/apache/http/localserver/LocalTestServer.java
index 88768b5b2..40d085233 100644
--- a/httpclient/src/test/java/org/apache/http/localserver/LocalTestServer.java
+++ b/httpclient/src/test/java/org/apache/http/localserver/LocalTestServer.java
@@ -310,7 +310,7 @@ public class LocalTestServer {
      */
     public InetSocketAddress getServiceAddress() {
         final ServerSocket ssock = servicedSocket; // avoid synchronization
-        Asserts.check(ssock != null, "Not running");
+        Asserts.notNull(ssock, "Not running");
         return (InetSocketAddress) ssock.getLocalSocketAddress();
     }