diff --git a/src/run_once.py b/src/run_once.py
new file mode 100755
index 0000000..ff15204
--- /dev/null
+++ b/src/run_once.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+
+# osmo_gsm_tester: invoke a single test run
+#
+# Copyright (C) 2016-2017 by sysmocom - s.f.m.c. GmbH
+#
+# Author: Neels Hofmeyr <neels@hofmeyr.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+'''osmo_gsm_tester: invoke a single test run.
+
+./run_once.py ~/path/to/test_package/
+
+Upon launch, a 'test_package/run-<date>' directory will be created.
+When complete, a symbolic link 'test_package/last_run' will point at this dir.
+The run dir then contains logs and test results.
+'''
+
+import osmo_gsm_tester
+
+if __name__ == '__main__':
+    import argparse
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-V', '--version', action='store_true',
+            help='Show version')
+    parser.add_argument('test_package', nargs='*',
+            help='Directory containing binaries to test')
+    args = parser.parse_args()
+
+    if args.version:
+        print(osmo_gsm_tester.__version__)
+        exit(0)
+
+
+# vim: expandtab tabstop=4 shiftwidth=4