diff --git a/src/fr/test/test.java b/src/fr/test/test.java
index 0856a9f..112c472 100644
--- a/src/fr/test/test.java
+++ b/src/fr/test/test.java
@@ -4,7 +4,7 @@ import java.util.Set;
 import java.util.HashSet;
 
 
-import static org.junit.Assert.*;
+import static org.junit.jupiter.api.Assertions.*;
 
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.BeforeEach;
@@ -15,33 +15,33 @@ import src.fr.api.*;
 
 public class test {
 
-    Category Engine = new CategoryImpl("Engine");
-    Category Transmission = new CategoryImpl("Transmission");
-    Category Exterior= new CategoryImpl("Exterior");
-    Category Interior= new CategoryImpl("Interior");
+    Category Engine;
+    Category Transmission;
+    Category Exterior;
+    Category Interior;
 
     //PartType
-    PartType EG100= new PartTypeImpl("EG100", Engine);
-    PartType EG133= new PartTypeImpl("EG133", Engine);
-    PartType EG210= new PartTypeImpl("EG210", Engine);
-    PartType ED110= new PartTypeImpl("ED110", Engine);
-    PartType ED180= new PartTypeImpl("ED180", Engine);
-    PartType EH120= new PartTypeImpl("EH120", Engine);
+    PartType EG100;
+    PartType EG133;
+    PartType EG210;
+    PartType ED110;
+    PartType ED180;
+    PartType EH120;
 
-    PartType TM5= new PartTypeImpl("TM5", Transmission);
-    PartType TM6= new PartTypeImpl("TM6", Transmission);
-    PartType TA5= new PartTypeImpl("TA5", Transmission);
-    PartType TS6= new PartTypeImpl("TS6", Transmission);
-    PartType TSF7= new PartTypeImpl("TSF7", Transmission);
-    PartType TC120= new PartTypeImpl("TC120", Transmission);
+    PartType TM5;
+    PartType TM6;
+    PartType TA5;
+    PartType TS6;
+    PartType TSF7;
+    PartType TC120;
 
-    PartType XC= new PartTypeImpl("XC", Exterior);
-    PartType XM= new PartTypeImpl("XM", Exterior);
-    PartType XS= new PartTypeImpl("XS", Exterior);
+    PartType XC;
+    PartType XM;
+    PartType XS;
 
-    PartType IN= new PartTypeImpl("IN", Interior);
-    PartType IH= new PartTypeImpl("IH", Interior);
-    PartType IS= new PartTypeImpl("IS", Interior);
+    PartType IN;
+    PartType IH;
+    PartType IS;
 
     CompatibilityManager cm;
 
@@ -50,6 +50,34 @@ public class test {
     @BeforeEach
     public void init(){
 
+        Engine = new CategoryImpl("Engine");
+        Transmission = new CategoryImpl("Transmission");
+        Exterior= new CategoryImpl("Exterior");
+        Interior= new CategoryImpl("Interior");
+
+        Engine = new CategoryImpl("Engine");
+        Transmission = new CategoryImpl("Transmission");
+        Exterior= new CategoryImpl("Exterior");
+        Interior= new CategoryImpl("Interior");
+        EG100= new PartTypeImpl("EG100", Engine);
+        EG133= new PartTypeImpl("EG133", Engine);
+        EG210= new PartTypeImpl("EG210", Engine);
+        ED110= new PartTypeImpl("ED110", Engine);
+        ED180= new PartTypeImpl("ED180", Engine);
+        EH120= new PartTypeImpl("EH120", Engine);
+        TM5= new PartTypeImpl("TM5", Transmission);
+        TM6= new PartTypeImpl("TM6", Transmission);
+        TA5= new PartTypeImpl("TA5", Transmission);
+        TS6= new PartTypeImpl("TS6", Transmission);
+        TSF7= new PartTypeImpl("TSF7", Transmission);
+        TC120= new PartTypeImpl("TC120", Transmission);
+        XC= new PartTypeImpl("XC", Exterior);
+        XM= new PartTypeImpl("XM", Exterior);
+        XS= new PartTypeImpl("XS", Exterior);
+        IN= new PartTypeImpl("IN", Interior);
+        IH= new PartTypeImpl("IH", Interior);
+        IS= new PartTypeImpl("IS", Interior);
+
         cm = new CompatibilityManagerImpl();
 
         Set<PartType> EH120Requirement = new HashSet<PartType>();