diff --git a/kibot/config_reader.py b/kibot/config_reader.py
index bcce50ae..934ac4e5 100644
--- a/kibot/config_reader.py
+++ b/kibot/config_reader.py
@@ -316,7 +316,7 @@ def print_preflights_help():
     for n, o in OrderedDict(sorted(pres.items())).items():
         help, options = o.get_doc()
         if help is None:
-            help = 'Undocumented'  # pragma: no cover (Internal)
+            help = 'Undocumented'
         print('- {}: {}.'.format(n, help.strip()))
         if options:
             print_output_options(n, options, 2)
diff --git a/tests/.config/kiplot/plugins/pre_test.py b/tests/.config/kiplot/plugins/pre_test.py
new file mode 100644
index 00000000..009f9ae1
--- /dev/null
+++ b/tests/.config/kiplot/plugins/pre_test.py
@@ -0,0 +1,12 @@
+from kibot.macros import macros, pre_class  # noqa: F401
+from .log import get_logger
+
+logger = get_logger(__name__)
+
+
+@pre_class
+class Pre_Test(BasePreFlight):  # noqa: F821
+    def __init__(self, name, value):
+        super().__init__(name, value)
+        self._enabled = value
+        self._pcb_related = True
diff --git a/tests/test_plot/test_misc.py b/tests/test_plot/test_misc.py
index 6037d94d..5f605783 100644
--- a/tests/test_plot/test_misc.py
+++ b/tests/test_plot/test_misc.py
@@ -382,6 +382,16 @@ def test_help_output_plugin_2(test_dir, monkeypatch):
     ctx.clean_up()
 
 
+def test_help_output_plugin_3(test_dir, monkeypatch):
+    ctx = context.TestContext(test_dir, 'test_help_output_plugin_3', '3Rs', 'pre_and_position', POS_DIR)
+    with monkeypatch.context() as m:
+        m.setenv("HOME", os.path.join(ctx.get_board_dir(), '../..'))
+        logging.debug('HOME='+os.environ['HOME'])
+        ctx.run(extra=['--help-preflights'], no_verbose=True, no_out_dir=True, no_yaml_file=True, no_board_file=True)
+    assert ctx.search_out('- pre_test: Undocumented')
+    ctx.clean_up()
+
+
 def test_help_outputs(test_dir):
     ctx = context.TestContext(test_dir, 'HelpOutputs', '3Rs', 'pre_and_position', POS_DIR)
     ctx.run(extra=['--help-outputs'], no_verbose=True, no_out_dir=True, no_yaml_file=True, no_board_file=True)