diff --git a/aprendizations/learnapp.py b/aprendizations/learnapp.py
index 6972c14..b16b1f1 100644
--- a/aprendizations/learnapp.py
+++ b/aprendizations/learnapp.py
@@ -143,6 +143,9 @@ class LearnApp(object):
                         logger.error(f'Failed right answer in "{qref}".')
                         errors += 1
                         continue  # to next test
+            elif q['type'] == 'textarea':
+                msg = f'  consider adding tests to {q["ref"]}'
+                logger.warning(msg)
 
             if 'tests_wrong' in q:
                 for t in q['tests_wrong']:
diff --git a/aprendizations/main.py b/aprendizations/main.py
index daacbed..7f5343f 100644
--- a/aprendizations/main.py
+++ b/aprendizations/main.py
@@ -18,24 +18,29 @@ from . import APP_NAME, APP_VERSION
 # ----------------------------------------------------------------------------
 def parse_cmdline_arguments():
     argparser = argparse.ArgumentParser(
-        description='Server for online learning. Students and topics '
-        'have to be previously configured. Please read the documentation '
-        'included with this software before running the server.'
+        description='Webserver for interactive learning and practice. '
+        'Please read the documentation included with this software before '
+        'using it.'
         )
 
     argparser.add_argument(
-        'courses', type=str,  # nargs='*',
-        help='Courses configuration file in YAML format.'
+        'courses', type=str, nargs='?', default='courses.yaml',
+        help='configuration file in YAML format.'
+        )
+
+    argparser.add_argument(
+        '-v', '--version', action='store_true',
+        help='show version information and exit'
         )
 
     argparser.add_argument(
         '--prefix', type=str, default='.',
-        help='Path where the topic directories can be found (default: .)'
+        help='path where the topic directories can be found (default: .)'
         )
 
     argparser.add_argument(
         '--port', type=int, default=8443,
-        help='Port to be used by the HTTPS server (default: 8443)'
+        help='port for the HTTPS server (default: 8443)'
         )
 
     argparser.add_argument(
@@ -44,18 +49,13 @@ def parse_cmdline_arguments():
         )
 
     argparser.add_argument(
-        '--check', action='store_true',
-        help='Sanity check questions (can take awhile)'
+        '-c', '--check', action='store_true',
+        help='sanity check questions (can take awhile)'
         )
 
     argparser.add_argument(
         '--debug', action='store_true',
-        help='Enable debug mode'
-        )
-
-    argparser.add_argument(
-        '--version', action='store_true',
-        help='Print version information'
+        help='enable debug mode'
         )
 
     return argparser.parse_args()
@@ -113,7 +113,7 @@ def main():
     arg = parse_cmdline_arguments()
 
     if arg.version:
-        print(f'{APP_NAME} - {APP_VERSION}\nPython {sys.version}')
+        print(f'{APP_NAME} {APP_VERSION}\nPython {sys.version}')
         sys.exit(0)
 
     # --- Setup logging
--
libgit2 0.21.2