diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java
index 63f1d55..1460025 100644
--- a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java
@@ -23,15 +23,23 @@ public class BuildingCard extends PlayableCard implements Cloneable , BuildingEf
         return effectType;
     }
 
-    public BuildingCard(int era,int price) {
+    public BuildingCard(int era,int price) throws IllegalArgumentException{
         super(era);
-        this.price = price;
+        if (price > 0) {
+            this.price = price;
+        } else {
+            throw new IllegalArgumentException();
+        }
     }
-    public BuildingCard(int effectId,EffectType effectType ,int era,int price) {
+    public BuildingCard(int effectId,EffectType effectType ,int era,int price) throws IllegalArgumentException{
         this.effectId = effectId;
         this.effectType = effectType;
         super(era);
-        this.price = price;
+        if (price > 0) {
+            this.price = price;
+        } else {
+            throw new IllegalArgumentException();
+        }
     }
 
 
diff --git a/src/test/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building13Test.java b/src/test/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building13Test.java
index 8e2290d..f1bd5a7 100644
--- a/src/test/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building13Test.java
+++ b/src/test/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building13Test.java
@@ -12,9 +12,22 @@ class Building13Test {
     void testClone() {
         assertThrows(IllegalArgumentException.class, () -> {
             Building13 b2 = new Building13(0, 15);
-            Building13 b3 = new Building13(-1, 100);
-            Building13 b4 = new Building13(5, -10);
-            Building13 b5 = new Building13(-2, 0);
+        });
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            Building13 b3 = new Building13(-1, 15);
+        });
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            Building13 b4 = new Building13(4, 15);
+        });
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            Building13 b5 = new Building13(2, 0);
+        });
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            Building13 b6 = new Building13(1, -15);
         });
 
         Building13 b1 = new Building13(1, 10);