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 f662d29..ad3b1b2 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
@@ -47,4 +47,21 @@ class Building13Test {
         b1.applyEffect(p1);
         assertEquals(35, p1.getPrestigeValue());
     }
+
+    @Test
+    void applyEffectException() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            Building13 b13 = new Building13(1, 10);
+            Player p = new Player("test");
+            b13.applyEffect(p);
+        });
+    }
+    @Test
+    void applyEffectMultiplePlayerException() {
+        Building13 b13 = new Building13(1, 10);
+        Player p1 = new Player("test1");
+        Player p2 = new Player("test2");
+        b13.buy(p1);
+        assertFalse(b13.buy(p2));
+    }
 }
\ No newline at end of file