diff --git a/test.py b/test.py
index 67006c75..75568a03 100644
--- a/test.py
+++ b/test.py
@@ -229,7 +229,7 @@ if __name__ == '__main__':
     parser.add_argument('--data', type=str, default='data/coco2014.data', help='*.data path')
     parser.add_argument('--weights', type=str, default='weights/yolov3-spp-ultralytics.pt', help='weights path')
     parser.add_argument('--batch-size', type=int, default=16, help='size of each image batch')
-    parser.add_argument('--img-size', type=int, default=416, help='inference size (pixels)')
+    parser.add_argument('--img-size', type=int, default=512, help='inference size (pixels)')
     parser.add_argument('--conf-thres', type=float, default=0.001, help='object confidence threshold')
     parser.add_argument('--iou-thres', type=float, default=0.6, help='IOU threshold for NMS')
     parser.add_argument('--save-json', action='store_true', help='save a cocoapi-compatible JSON results file')