diff --git a/t/arcs.t b/t/arcs.t
index 4cc01260c..7fcc69bf4 100644
--- a/t/arcs.t
+++ b/t/arcs.t
@@ -2,7 +2,7 @@ use Test::More;
 use strict;
 use warnings;
 
-plan tests => 6;
+plan tests => 10;
 
 BEGIN {
     use FindBin;
@@ -30,21 +30,35 @@ use Slic3r;
 #==========================================================
 
 {
-    my $path = Slic3r::ExtrusionPath->cast([
+    my $path1 = Slic3r::ExtrusionPath->cast([
         [10,20], [10.7845909572784,19.9691733373313], [11.5643446504023,19.8768834059514], 
         [12.3344536385591,19.7236992039768], [13.0901699437495,19.5105651629515], 
         [13.8268343236509,19.2387953251129], [14.5399049973955,18.9100652418837], 
         [15.2249856471595,18.5264016435409], [15.8778525229247,18.0901699437495], 
         [16.4944804833018,17.6040596560003],
     ], role => 'fill');
-    my $collection = Slic3r::ExtrusionPath::Collection->new(paths => [$path]);
-    $collection->detect_arcs(10, 1);
+    my $path2 = Slic3r::ExtrusionPath->cast([ reverse @{$path1->points} ], role => 'fill');
     
-    is scalar(@{$collection->paths}), 1, 'path collection now contains one path';
-    isa_ok $collection->paths->[0], 'Slic3r::ExtrusionPath::Arc', 'path';
-    is $collection->paths->[0]->orientation, 'cw', 'orientation was correctly detected';
-    my $center = [ map sprintf('%.0f', $_), @{ $collection->paths->[0]->center } ];
-    is_deeply $center, [10,10], 'center was correctly detected';
+    my $collection1 = Slic3r::ExtrusionPath::Collection->new(paths => [$path1]);
+    my $collection2 = Slic3r::ExtrusionPath::Collection->new(paths => [$path2]);
+    
+    $collection1->detect_arcs(10, 1);
+    $collection2->detect_arcs(10, 1);
+    
+    is scalar(@{$collection1->paths}), 1, 'path collection now contains one path';
+    is scalar(@{$collection2->paths}), 1, 'path collection now contains one path';
+    
+    isa_ok $collection1->paths->[0], 'Slic3r::ExtrusionPath::Arc', 'path';
+    isa_ok $collection2->paths->[0], 'Slic3r::ExtrusionPath::Arc', 'path';
+    
+    is $collection1->paths->[0]->orientation, 'cw', 'cw orientation was correctly detected';
+    is $collection2->paths->[0]->orientation, 'ccw', 'ccw orientation was correctly detected';
+    
+    my $center1 = [ map sprintf('%.0f', $_), @{ $collection1->paths->[0]->center } ];
+    is_deeply $center1, [10,10], 'center was correctly detected';
+    
+    my $center2 = [ map sprintf('%.0f', $_), @{ $collection2->paths->[0]->center } ];
+    is_deeply $center2, [10,10], 'center was correctly detected';
 }
 
 #==========================================================