diff --git a/mailchimp_api/workflow.py b/mailchimp_api/workflow.py
index d4bf48a..1264bfa 100644
--- a/mailchimp_api/workflow.py
+++ b/mailchimp_api/workflow.py
@@ -27,7 +27,7 @@ def _get_config() -> Config:
 config = _get_config()
 
 
-@wf.register(name="simple_learning", description="Student and teacher learning chat")  # type: ignore[misc]
+@wf.register(name="mailchimp_chat", description="Mailchimp tags update chat")  # type: ignore[misc]
 def simple_workflow(ui: UI, params: dict[str, Any]) -> str:
     timestamp = time.strftime("%Y-%m-%d-%H-%M-%S")
     body = f"""Please upload **.csv** file with the email addresses for which you want to update the tags.
diff --git a/tests/deployment/test_main_1_fastapi.py b/tests/deployment/test_main_1_fastapi.py
index f2963f0..4bea806 100644
--- a/tests/deployment/test_main_1_fastapi.py
+++ b/tests/deployment/test_main_1_fastapi.py
@@ -74,3 +74,14 @@ def test_upload_endpoint_raises_400_error_if_file_is_not_csv(self) -> None:
         )
         assert response.status_code == 400
         assert "Only CSV files are supported" in response.text
+
+    def test_upload_endpoint_raises_400_error_if_email_column_not_found(self) -> None:
+        csv_content = "name\n"
+        csv_file = BytesIO(csv_content.encode("utf-8"))
+        response = self.client.post(
+            "/upload",
+            files={"file": ("emails.csv", csv_file)},
+            data={"timestamp": "test-22-09-2021"},
+        )
+        assert response.status_code == 400
+        assert "'email' column not found in CSV file" in response.text