diff --git a/Unit testing/billy_objects_tests.cpp b/Unit testing/billy_objects_tests.cpp
index caad15d..d762848 100644
--- a/Unit testing/billy_objects_tests.cpp	
+++ b/Unit testing/billy_objects_tests.cpp	
@@ -112,7 +112,7 @@ TEST_CASE("[D] Deserialize full BillyObjects", "[deserialize][1]") {
     REQUIRE(std::get<equipments>(dummy_object.objects.at(equipments::MedicKit)->get_type()) == equipments::MedicKit);
 }
 
-TEST_CASE("[E] Pushing popping BillyObjects", "[pushpop][0]") {
+TEST_CASE("[D] Pushing popping BillyObjects", "[pushpop][0]") {
     constexpr std::array<billyEnums, 12> all_objects{
         weapons::Sword,
         weapons::Lance,
@@ -153,7 +153,7 @@ TEST_CASE("[E] Pushing popping BillyObjects", "[pushpop][0]") {
     }
 }
 
-TEST_CASE("[E] Double erase no throw", "[pushpop][1]") {
+TEST_CASE("[D] Double erase no throw", "[pushpop][1]") {
     BillyObjects gestionnaire{};
     CharacterSheet sheet;
     REQUIRE(sheet.get_objects().empty());
@@ -165,7 +165,7 @@ TEST_CASE("[E] Double erase no throw", "[pushpop][1]") {
     REQUIRE_FALSE(gestionnaire.erase_object(sheet, weapons::Bow));
 }
 
-TEST_CASE("[E] Insert no more than 3", "[pushpop][2]") {
+TEST_CASE("[D] Insert no more than 3", "[pushpop][2]") {
     BillyObjects gestionnaire{};
     CharacterSheet sheet;
     REQUIRE(sheet.get_objects().empty());
@@ -178,7 +178,7 @@ TEST_CASE("[E] Insert no more than 3", "[pushpop][2]") {
     REQUIRE(sheet.get_objects().size() == 3);
 }
 
-TEST_CASE("[F] Printing Billy's objects", "[printing]") {
+TEST_CASE("[D] Printing Billy's objects", "[printing]") {
     for (const auto &object: BillyObjects::all_objects) {
         const std::unique_ptr<GenericObject> obj = test::get_obj(object);
         REQUIRE_NOTHROW(BillyObjects::billy_object_to_string(obj));
diff --git a/include/characteristic.hpp b/include/characteristic.hpp
index ad8f167..f4d886d 100644
--- a/include/characteristic.hpp
+++ b/include/characteristic.hpp
@@ -12,6 +12,7 @@ namespace character {
 }
 
 namespace character::characteristic {
+
     /*!
      * \brief Different characteristic type
      */
@@ -40,7 +41,7 @@ namespace character::characteristic {
         std::uint32_t carac{ 0 };
 
         //! Value changed from a billyObjects (billyEnums) possessed
-        std::int32_t materiel{ 0 };
+        std::uint32_t materiel{ 0 };
 
         //! Additional value when creating the character
         std::uint32_t additional{ 0 };
@@ -69,7 +70,7 @@ namespace character::characteristic {
 
         constexpr Characteristic(const characType inType,
                                  const std::uint32_t carac,
-                                 const std::int32_t materiel,
+                                 const std::uint32_t materiel,
                                  const std::uint32_t additional) :
             base(get_base(inType)),
             carac(carac),
@@ -97,11 +98,11 @@ namespace character::characteristic {
 
         [[nodiscard]] std::uint32_t get_carac() const { return carac; }
 
-        [[nodiscard]] std::int32_t get_materiel() const { return materiel; }
+        [[nodiscard]] std::uint32_t get_materiel() const { return materiel; }
 
         [[nodiscard]] std::uint32_t get_additional() const { return additional; }
 
-        [[nodiscard]] std::int32_t get_total() const noexcept {
+        [[nodiscard]] std::size_t get_total() const noexcept {
             if (total == defaultValue::max()) {
                 total = static_cast<std::int32_t>(base + carac + materiel + additional);
                 total = std::max(total, 0);
@@ -113,7 +114,7 @@ namespace character::characteristic {
             const_cast<std::uint32_t &>(charac.base) = j.at("base").get<std::uint32_t>();
             const_cast<characType &>(charac.type) = static_cast<characType>(j.at("type").get<std::uint8_t>());
             charac.carac = j.at("carac").get<std::uint32_t>();
-            charac.materiel = j.at("materiel").get<std::int32_t>();
+            charac.materiel = j.at("materiel").get<std::uint32_t>();
             charac.additional = j.at("additional").get<std::uint32_t>();
             charac.total = j.at("total").get<std::int32_t>();
         }