diff --git a/nau_openedx_extensions/certificate_export/management/commands/export_course_certificates.py b/nau_openedx_extensions/certificate_export/management/commands/export_course_certificates.py
index c10859df..ad305f4f 100644
--- a/nau_openedx_extensions/certificate_export/management/commands/export_course_certificates.py
+++ b/nau_openedx_extensions/certificate_export/management/commands/export_course_certificates.py
@@ -80,7 +80,7 @@ def handle(self, *args, **options):
             # iterate each certificate and append each certificate as a row
             for certificate in course_generated_certificates:
                 certificate_web_link_url = f"{lms_root_url}/certificates/{certificate.verify_uuid}"
-                certificate_download_pdf_link = certificate_download_url + certificate.verify_uuid
+                certificate_download_pdf_link = f"{certificate_download_url}/{certificate.verify_uuid}"
 
                 rows.append(
                     [
diff --git a/nau_openedx_extensions/certificate_export/tests/test_commands.py b/nau_openedx_extensions/certificate_export/tests/test_commands.py
index a665b53e..a9883b15 100644
--- a/nau_openedx_extensions/certificate_export/tests/test_commands.py
+++ b/nau_openedx_extensions/certificate_export/tests/test_commands.py
@@ -476,7 +476,7 @@ def setUp(self):
         super().setUp()
         self.valid_course_id = "course-v1:NAU+Demo+DemoCourse"
         self.valid_course_key = CourseKey.from_string(self.valid_course_id)
-        self.valid_download_url = "https://example.com/certificates/"
+        self.valid_download_url = "https://example.com/certificates"
         self.lms_root_url = "https://lms.example.com"
 
         # Use the renamed import
@@ -628,7 +628,7 @@ def test_csv_content_format(self, mock_generated_certificate, mock_upload_csv,
         self.assertEqual(data_row[6], expected_web_link)
 
         # Verify download link format
-        expected_download_link = f"{self.valid_download_url}test-uuid-123"
+        expected_download_link = f"{self.valid_download_url}/test-uuid-123"
         self.assertEqual(data_row[7], expected_download_link)
 
     @patch_use_read_replica