diff --git a/tests/sys/funcTest.php b/tests/sys/funcTest.php
index ab69e62..40e5862 100644
--- a/tests/sys/funcTest.php
+++ b/tests/sys/funcTest.php
@@ -1,14 +1,15 @@
 <?php
 
 namespace {
-  function func36() {
-    return 36;
-  }
+  function func36(): int { return 36; }
   
-  function m1($a): array { return [$a]; }
-  function m1o1($a, $b=1): array { return [$a, $b]; }
-  function m1v($a, ...$c): array { return [$a, ...$c]; }
-  function m1o1v($a, $b=1, ...$c): array { return [$a, $b, ...$c]; }
+  function func_m1($a): array { return [$a]; }
+  function func_o1($b=9): array { return [$b]; }
+  function func_v(...$c): array { return [...$c]; }
+  function func_m1o1($a, $b=9): array { return [$a, $b]; }
+  function func_m1v($a, ...$c): array { return [$a, ...$c]; }
+  function func_m1o1v($a, $b=9, ...$c): array { return [$a, $b, ...$c]; }
+  function func_o1v($b=9, ...$c): array { return [$b, ...$c]; }
 }
 
 namespace nur\sery\sys {
@@ -148,46 +149,86 @@ namespace nur\sery\sys {
       self::assertSame(21, func::call($closure));
     }
 
-    function testFix_args() {
-      self::assertSame([null], func::call("m1"));
-      self::assertSame([null], func::call("m1", null));
-      self::assertSame([null], func::call("m1", null, null));
-      self::assertSame([null], func::call("m1", null, null, null));
-      self::assertSame([null], func::call("m1", null, null, null, null));
-      self::assertSame([1], func::call("m1", 1));
-      self::assertSame([1], func::call("m1", 1, 2));
-      self::assertSame([1], func::call("m1", 1, 2, 3));
-      self::assertSame([1], func::call("m1", 1, 2, 3, 4));
+    function test_prepare_fill() {
+      # vérifier que les arguments sont bien remplis, en fonction du fait qu'ils
+      # soient obligatoires, facultatifs ou variadiques
       
-      self::assertSame([null, 1], func::call("m1o1"));
-      self::assertSame([null, 1], func::call("m1o1", null));
-      self::assertSame([null, null], func::call("m1o1", null, null));
-      self::assertSame([null, null], func::call("m1o1", null, null, null));
-      self::assertSame([null, null], func::call("m1o1", null, null, null, null));
-      self::assertSame([1, 1], func::call("m1o1", 1));
-      self::assertSame([1, 2], func::call("m1o1", 1, 2));
-      self::assertSame([1, 2], func::call("m1o1", 1, 2, 3));
-      self::assertSame([1, 2], func::call("m1o1", 1, 2, 3, 4));
+      # m1
+      self::assertSame([null], func::call("func_m1"));
+      self::assertSame([null], func::call("func_m1", null));
+      self::assertSame([null], func::call("func_m1", null, null));
+      self::assertSame([null], func::call("func_m1", null, null, null));
+      self::assertSame([null], func::call("func_m1", null, null, null, null));
+      self::assertSame([1], func::call("func_m1", 1));
+      self::assertSame([1], func::call("func_m1", 1, 2));
+      self::assertSame([1], func::call("func_m1", 1, 2, 3));
+      self::assertSame([1], func::call("func_m1", 1, 2, 3, 4));
       
-      self::assertSame([null], func::call("m1v"));
-      self::assertSame([null], func::call("m1v", null));
-      self::assertSame([null, null], func::call("m1v", null, null));
-      self::assertSame([null, null, null], func::call("m1v", null, null, null));
-      self::assertSame([null, null, null, null], func::call("m1v", null, null, null, null));
-      self::assertSame([1], func::call("m1v", 1));
-      self::assertSame([1, 2], func::call("m1v", 1, 2));
-      self::assertSame([1, 2, 3], func::call("m1v", 1, 2, 3));
-      self::assertSame([1, 2, 3, 4], func::call("m1v", 1, 2, 3, 4));
+      # o1
+      self::assertSame([9], func::call("func_o1"));
+      self::assertSame([null], func::call("func_o1", null));
+      self::assertSame([null], func::call("func_o1", null, null));
+      self::assertSame([null], func::call("func_o1", null, null, null));
+      self::assertSame([null], func::call("func_o1", null, null, null, null));
+      self::assertSame([1], func::call("func_o1", 1));
+      self::assertSame([1], func::call("func_o1", 1, 2));
+      self::assertSame([1], func::call("func_o1", 1, 2, 3));
+      self::assertSame([1], func::call("func_o1", 1, 2, 3, 4));
       
-      self::assertSame([null, 1], func::call("m1o1v"));
-      self::assertSame([null, 1], func::call("m1o1v", null));
-      self::assertSame([null, null], func::call("m1o1v", null, null));
-      self::assertSame([null, null, null], func::call("m1o1v", null, null, null));
-      self::assertSame([null, null, null, null], func::call("m1o1v", null, null, null, null));
-      self::assertSame([1, 1], func::call("m1o1v", 1));
-      self::assertSame([1, 2], func::call("m1o1v", 1, 2));
-      self::assertSame([1, 2, 3], func::call("m1o1v", 1, 2, 3));
-      self::assertSame([1, 2, 3, 4], func::call("m1o1v", 1, 2, 3, 4));
+      # v
+      self::assertSame([], func::call("func_v"));
+      self::assertSame([null], func::call("func_v", null));
+      self::assertSame([null, null], func::call("func_v", null, null));
+      self::assertSame([null, null, null], func::call("func_v", null, null, null));
+      self::assertSame([null, null, null, null], func::call("func_v", null, null, null, null));
+      self::assertSame([1], func::call("func_v", 1));
+      self::assertSame([1, 2], func::call("func_v", 1, 2));
+      self::assertSame([1, 2, 3], func::call("func_v", 1, 2, 3));
+      self::assertSame([1, 2, 3, 4], func::call("func_v", 1, 2, 3, 4));
+      
+      # m1o1
+      self::assertSame([null, 9], func::call("func_m1o1"));
+      self::assertSame([null, 9], func::call("func_m1o1", null));
+      self::assertSame([null, null], func::call("func_m1o1", null, null));
+      self::assertSame([null, null], func::call("func_m1o1", null, null, null));
+      self::assertSame([null, null], func::call("func_m1o1", null, null, null, null));
+      self::assertSame([1, 9], func::call("func_m1o1", 1));
+      self::assertSame([1, 2], func::call("func_m1o1", 1, 2));
+      self::assertSame([1, 2], func::call("func_m1o1", 1, 2, 3));
+      self::assertSame([1, 2], func::call("func_m1o1", 1, 2, 3, 4));
+      
+      # m1v
+      self::assertSame([null], func::call("func_m1v"));
+      self::assertSame([null], func::call("func_m1v", null));
+      self::assertSame([null, null], func::call("func_m1v", null, null));
+      self::assertSame([null, null, null], func::call("func_m1v", null, null, null));
+      self::assertSame([null, null, null, null], func::call("func_m1v", null, null, null, null));
+      self::assertSame([1], func::call("func_m1v", 1));
+      self::assertSame([1, 2], func::call("func_m1v", 1, 2));
+      self::assertSame([1, 2, 3], func::call("func_m1v", 1, 2, 3));
+      self::assertSame([1, 2, 3, 4], func::call("func_m1v", 1, 2, 3, 4));
+      
+      # m1o1v
+      self::assertSame([null, 9], func::call("func_m1o1v"));
+      self::assertSame([null, 9], func::call("func_m1o1v", null));
+      self::assertSame([null, null], func::call("func_m1o1v", null, null));
+      self::assertSame([null, null, null], func::call("func_m1o1v", null, null, null));
+      self::assertSame([null, null, null, null], func::call("func_m1o1v", null, null, null, null));
+      self::assertSame([1, 9], func::call("func_m1o1v", 1));
+      self::assertSame([1, 2], func::call("func_m1o1v", 1, 2));
+      self::assertSame([1, 2, 3], func::call("func_m1o1v", 1, 2, 3));
+      self::assertSame([1, 2, 3, 4], func::call("func_m1o1v", 1, 2, 3, 4));
+      
+      # o1v
+      self::assertSame([9], func::call("func_o1v"));
+      self::assertSame([null], func::call("func_o1v", null));
+      self::assertSame([null, null], func::call("func_o1v", null, null));
+      self::assertSame([null, null, null], func::call("func_o1v", null, null, null));
+      self::assertSame([null, null, null, null], func::call("func_o1v", null, null, null, null));
+      self::assertSame([1], func::call("func_o1v", 1));
+      self::assertSame([1, 2], func::call("func_o1v", 1, 2));
+      self::assertSame([1, 2, 3], func::call("func_o1v", 1, 2, 3));
+      self::assertSame([1, 2, 3, 4], func::call("func_o1v", 1, 2, 3, 4));
     }
 
     function testCall_all() {