diff --git a/t/shells.t b/t/shells.t
index b6d6bf9be..29bc0b5f0 100644
--- a/t/shells.t
+++ b/t/shells.t
@@ -231,8 +231,8 @@ use Slic3r::Test;
     $config->set('bottom_solid_layers', 0);
     $config->set('retract_layer_change', [0]);
     $config->set('skirts', 0);
-    $config->set('first_layer_height', $config->layer_height);
     $config->set('layer_height', 0.4);
+    $config->set('first_layer_height', $config->layer_height);
     $config->set('start_gcode', '');
 #    $config->set('use_relative_e_distances', 1);
     $config->validate;