Index: test/dosep.py
===================================================================
--- test/dosep.py
+++ test/dosep.py
@@ -233,7 +233,10 @@
 
     is_posix = (os.name == "posix")
     dotest_argv = shlex.split(dotest_option_string, posix=is_posix) if dotest_option_string else []
-    dotest_options = dotest_args.getArguments(dotest_argv)
+
+    parser = dotest_args.create_parser()
+    dotest_options = dotest_args.parse_args(parser, dotest_argv)
+
     if not dotest_options.s:
         # no session log directory, we need to add this to prevent
         # every dotest invocation from creating its own directory
Index: test/dotest.py
===================================================================
--- test/dotest.py
+++ test/dotest.py
@@ -491,7 +491,8 @@
     platform_system = platform.system()
     platform_machine = platform.machine()
 
-    args = dotest_args.getArguments(sys.argv[1:])
+    parser = dotest_args.create_parser()
+    args = dotest_args.parse_args(parser, sys.argv[1:])
     
     if args.unset_env_varnames:
         for env_var in args.unset_env_varnames:
Index: test/dotest_args.py
===================================================================
--- test/dotest_args.py
+++ test/dotest_args.py
@@ -26,8 +26,7 @@
     else:
         return parser.parse_args(args=argv)
 
-def getArguments(argv):
-
+def create_parser():
     parser = argparse.ArgumentParser(description='description', prefix_chars='+-', add_help=False)
     group = None
 
@@ -114,4 +113,4 @@
     group = parser.add_argument_group('Test directories')
     group.add_argument('args', metavar='test-dir', nargs='*', help='Specify a list of directory names to search for test modules named after Test*.py (test discovery). If empty, search from the current working directory instead.')
 
-    return parse_args(parser, argv)
+    return parser