diff --git a/ofx_processor/utils/processor.py b/ofx_processor/utils/processor.py
index ea65969..dd0caf7 100644
--- a/ofx_processor/utils/processor.py
+++ b/ofx_processor/utils/processor.py
@@ -12,16 +12,16 @@ class Line:
         self.data = data
 
     def get_date(self):
-        pass
+        raise NotImplementedError  # pragma: nocover
 
     def get_amount(self):
-        pass
+        raise NotImplementedError  # pragma: nocover
 
     def get_memo(self):
-        pass
+        raise NotImplementedError  # pragma: nocover
 
     def get_payee(self):
-        pass
+        raise NotImplementedError  # pragma: nocover
 
     def to_ynab_transaction(self, transaction_ids):
         date = self.get_date()
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..ceb9a37
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,34 @@
+import unittest
+from unittest import mock
+from unittest.mock import call
+
+from click.testing import CliRunner
+
+from ofx_processor.processors.bpvf import BpvfProcessor
+from ofx_processor.processors.ce import CeProcessor
+from ofx_processor.processors.revolut import RevolutProcessor
+from ofx_processor.utils.ynab import config
+
+
+class UtilsTestCase(unittest.TestCase):
+    @staticmethod
+    def test_discover_processors():
+        ce_main = CeProcessor.main
+        bpvf_main = BpvfProcessor.main
+        revolut_main = RevolutProcessor.main
+        runner = CliRunner()
+        with mock.patch("click.core.Group.add_command") as add_command:
+            from ofx_processor.main import cli
+
+            runner.invoke(cli, ["--help"])
+            calls = [
+                call(ce_main),
+                call(bpvf_main),
+                call(revolut_main),
+                call(config, name="config"),
+            ]
+            add_command.assert_has_calls(calls, any_order=True)
+
+
+if __name__ == "__main__":
+    unittest.main()  # pragma: nocover