1 files changed, 1 insertions, 1 deletions
diff --git a/t/flow.t b/t/flow.t
index 071d290c8..659a1171e 100644
--- a/t/flow.t
+++ b/t/flow.t
@@ -43,7 +43,7 @@ use Slic3r::Test;
     my $config = Slic3r::Config->new_from_defaults;
     $config->set('bridge_speed', 99);
     $config->set('bridge_flow_ratio', 1);
-    $config->set('cooling', 0);                 # to prevent speeds from being altered
+    $config->set('cooling', [ 0 ]);             # to prevent speeds from being altered
     $config->set('first_layer_speed', '100%');  # to prevent speeds from being altered
     
     my $test = sub {