diff --git a/tests/cartitem_test.php b/tests/cartitem_test.php
index 8b3e401..ee8f31c 100644
--- a/tests/cartitem_test.php
+++ b/tests/cartitem_test.php
@@ -104,4 +104,46 @@ public function test_as_array_contains_all_fields(): void {
             $this->assertArrayHasKey($property->getName(), $cartitemarray);
         }
     }
+
+    /**
+     * Test costcenter not set
+     * @covers \cartitem->costcenter
+     *
+     * @return void
+     */
+    public function test_costcenter_is_set(): void {
+        $price = 10.00;
+        $cartitem = new cartitem(
+            1,
+            'Testitem 1',
+            $price,
+            get_config('local_shopping_cart', 'globalcurrency') ?? 'EUR',
+            'local_shopping_cart',
+            'main',
+            'My Testitem 1 description'
+        );
+
+        $this->assertNull($cartitem->costcenter);
+
+        $costcenter = 'TestitemCostcenter';
+        $cartitem = new cartitem(
+            1,
+            'Testitem 1',
+            $price,
+            get_config('local_shopping_cart', 'globalcurrency') ?? 'EUR',
+            'local_shopping_cart',
+            'main',
+            'My Testitem 1 description',
+            '',
+            null,
+            null,
+            null,
+            null,
+            0,
+            $costcenter
+        );
+
+        $this->assertEquals($costcenter, $cartitem->costcenter);
+    }
+
 }
diff --git a/tests/cartstore_test.php b/tests/cartstore_test.php
index f602939..16c0be6 100644
--- a/tests/cartstore_test.php
+++ b/tests/cartstore_test.php
@@ -140,6 +140,56 @@ public function test_cartstore_add_items(): void {
         $this->assertEquals($data["initialtotal"], 47.63);
     }
 
+    /**
+     * Test test_cartstore_get_costcenter
+     * @covers \cartstore
+     */
+    public function test_cartstore_get_costcenter(): void {
+
+        $user1 = $this->get_data_generator()->create_user();
+
+        $cartstore = cartstore::instance((int)$user1->id);
+
+        shopping_cart::add_item_to_cart(
+            'local_shopping_cart',
+            'testitem',
+            1,
+            $user1->id);
+
+        shopping_cart::add_item_to_cart(
+            'local_shopping_cart',
+            'testitem',
+            2,
+            $user1->id);
+
+        $data = $cartstore->get_data();
+
+        // Check total price and absence of costcenter and credits.
+        $this->assertEquals(33.83, $data['price']);
+        $this->assertEquals(30.3, $data['price_net']);
+        $this->assertEquals(33.83, $data['initialtotal']);
+        $this->assertEmpty($data['costcenter']);
+        $this->assertEmpty($data['deductible']);
+        $this->assertEmpty($data['remainingcredit']);
+        $this->assertArrayHasKey('items', $data);
+        $this->assertEquals(2, count($data['items']));
+
+        // Set default costcenter and credits for it.
+        set_config('defaultcostcenterforcredits', 'CostCenter1', 'local_shopping_cart');
+        shopping_cart_credits::add_credit($user1->id, 50, 'EUR', 'CostCenter1');
+        $data = $cartstore->get_data();
+
+        // Check total price, costcenter and credits.
+        $this->assertEmpty($data['price']);
+        $this->assertEquals(30.3, $data['price_net']);
+        $this->assertEquals(33.83, $data['deductible']);
+        $this->assertEquals(33.83, $data['initialtotal']);
+        $this->assertEquals(16.17, $data['remainingcredit']);
+        $this->assertEquals('CostCenter1', $data['costcenter']);
+        $this->assertArrayHasKey('items', $data);
+        $this->assertEquals(2, count($data['items']));
+    }
+
     /**
      * Data provider for test_cartstore_get_data
      *