diff --git a/tests/modelnet-test-dragonfly.conf b/tests/modelnet-test-dragonfly.conf
index 9e5c5f65f9767728d6720b1bdd0fe4c9f10e1e40..6b50f2af552d9262876756f2ce999fa23caef0ea 100644
--- a/tests/modelnet-test-dragonfly.conf
+++ b/tests/modelnet-test-dragonfly.conf
@@ -20,6 +20,6 @@ PARAMS
    local_bandwidth="5.25";
    global_bandwidth="4.7";
    cn_bandwidth="5.25";
-   message_size="2048";
+   message_size="512";
    routing="minimal";
 }