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-rw-r--r--tests/roi.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/tests/roi.py b/tests/roi.py
index f429740..0f614cd 100644
--- a/tests/roi.py
+++ b/tests/roi.py
@@ -24,7 +24,8 @@ def grab(camera, height=3840, offset=0):
if __name__ == '__main__':
parser = argparse.ArgumentParser()
- parser.add_argument('--device', '-d', type=str, help="TANGO device path")
+ parser.add_argument('--device', '-d', type=str, required=True,
+ help="TANGO device path")
args = parser.parse_args()