diff --git a/kibot/config_reader.py b/kibot/config_reader.py
index 934ac4e5..4eb9addb 100644
--- a/kibot/config_reader.py
+++ b/kibot/config_reader.py
@@ -329,7 +329,7 @@ def print_filters_help():
     for n, o in OrderedDict(sorted(fils.items())).items():
         help = o.__doc__
         if help is None:
-            help = 'Undocumented'  # pragma: no cover (Internal)
+            help = 'Undocumented'
         print('- {}: {}.'.format(n, help.strip()))
         print_output_options(n, o, 2)
 
diff --git a/tests/.config/kiplot/plugins/fil_test.py b/tests/.config/kiplot/plugins/fil_test.py
new file mode 100644
index 00000000..9842010a
--- /dev/null
+++ b/tests/.config/kiplot/plugins/fil_test.py
@@ -0,0 +1,14 @@
+from kibot.macros import macros, document, filter_class  # noqa: F401
+from . import log
+
+logger = log.get_logger(__name__)
+
+
+@filter_class
+class Filter_Test(BaseFilter):  # noqa: F821
+    def __init__(self):
+        super().__init__()
+        with document:
+            self.foo = ':'
+            self.bar = False
+            """ Rename fields matching the variant to the value of the component """
diff --git a/tests/test_plot/test_misc.py b/tests/test_plot/test_misc.py
index 5f605783..165820db 100644
--- a/tests/test_plot/test_misc.py
+++ b/tests/test_plot/test_misc.py
@@ -392,6 +392,16 @@ def test_help_output_plugin_3(test_dir, monkeypatch):
     ctx.clean_up()
 
 
+def test_help_output_plugin_4(test_dir, monkeypatch):
+    ctx = context.TestContext(test_dir, 'test_help_output_plugin_4', '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-filters'], no_verbose=True, no_out_dir=True, no_yaml_file=True, no_board_file=True)
+    assert ctx.search_out('- filter_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)