diff --git a/helpmehelpapplication/src/test/java/ntnu/systemutvikling/team6/models/CharityRegistryTest.java b/helpmehelpapplication/src/test/java/ntnu/systemutvikling/team6/models/CharityRegistryTest.java
index c0e32aa..4636413 100644
--- a/helpmehelpapplication/src/test/java/ntnu/systemutvikling/team6/models/CharityRegistryTest.java
+++ b/helpmehelpapplication/src/test/java/ntnu/systemutvikling/team6/models/CharityRegistryTest.java
@@ -66,6 +66,15 @@ void testFindCharityByOrgNumber() {
     assertEquals(charity, result.get());
   }
 
+  @Test
+  void testFindCharityByOrgNumberNullThrowsException() {
+      registry.addCharity(charity);
+
+      assertThrows(
+              IllegalArgumentException.class,
+              () -> registry.findCharityByOrgnumber(null));
+  }
+
   @Test
   void testFindCharityByIdNotFound() {
     Optional<Charity> result = registry.findCharityByUUID(UUID.randomUUID());
@@ -87,6 +96,16 @@ void testRemoveCharitySuccessfully() {
     assertTrue(registry.getAllCharities().isEmpty());
   }
 
+  @Test
+  void testRemoveCharitySuccessfullyOrgNumber() {
+      registry.addCharity(charity);
+
+      boolean removed = registry.removeCharity(charity.getOrg_number());
+
+      assertTrue(removed);
+      assertTrue(registry.getAllCharities().isEmpty());
+  }
+
   @Test
   void testRemoveCharityNotFound() {
     boolean removed = registry.removeCharityUUID(UUID.randomUUID());
@@ -97,4 +116,11 @@ void testRemoveCharityNotFound() {
   void testRemoveCharityNullThrowsException() {
     assertThrows(IllegalArgumentException.class, () -> registry.removeCharity(null));
   }
+
+  @Test
+  void testRemoveCharityUUIDNullThrowsException() {
+      UUID uuid = null;
+      assertThrows(IllegalArgumentException.class, () -> registry.removeCharityUUID(uuid));
+
+  }
 }