diff --git a/application_manager/__pycache__/app_dht.cpython-310.pyc b/application_manager/__pycache__/app_dht.cpython-310.pyc
index 3ad3785..20e83fd 100644
Binary files a/application_manager/__pycache__/app_dht.cpython-310.pyc and b/application_manager/__pycache__/app_dht.cpython-310.pyc differ
diff --git a/application_manager/app_dht.py b/application_manager/app_dht.py
index a14e95e..00c9ab5 100644
--- a/application_manager/app_dht.py
+++ b/application_manager/app_dht.py
@@ -57,6 +57,8 @@ def update_dht_list(ws, image_name):
 
 
 def pull_image(ws, image_name, topic_uuid, requestor_id, request_id):
+    if image_name == "":
+        raise ValueError("Image name cannot be empty")
     if image_name:
         try:
             client.images.pull(image_name)
diff --git a/tests/__pycache__/test_application_manager.cpython-310-pytest-7.4.0.pyc b/tests/__pycache__/test_application_manager.cpython-310-pytest-7.4.0.pyc
index b46eee5..c61f91e 100644
Binary files a/tests/__pycache__/test_application_manager.cpython-310-pytest-7.4.0.pyc and b/tests/__pycache__/test_application_manager.cpython-310-pytest-7.4.0.pyc differ
diff --git a/tests/test_application_manager.py b/tests/test_application_manager.py
index 1ff0b6c..8d5164d 100644
--- a/tests/test_application_manager.py
+++ b/tests/test_application_manager.py
@@ -74,17 +74,14 @@ def test_publish_failure(self):
                 ws, topic_uuid, requestor_id, request_id, containers
             )
 
-    def test_pull_image_invalid_image_name(self):
-        """Test the pull_image function with an invalid image name."""
+    def test_pull_image_empty_image_name(self):
+        """Test the pull_image function with an empty image name."""
         ws = mock.Mock()
-        image_name = "invalid_image_name"
+        image_name = ""
 
         # Call the pull_image function.
-        response = app_dht.pull_image(ws, image_name, "1", "1", "1")
-
-        # Assert that the response is not successful.
-        self.assertEqual(response[0], "Image not found")
-        self.assertEqual(response[1], 404)
+        with self.assertRaises(ValueError):
+            app_dht.pull_image(ws, image_name, "1", "1", "1")
 
 
 if __name__ == "__main__":