diff --git a/mmseg/models/segmentors/depth_estimator.py b/mmseg/models/segmentors/depth_estimator.py
index 1020637e73..b9ebc05c0f 100644
--- a/mmseg/models/segmentors/depth_estimator.py
+++ b/mmseg/models/segmentors/depth_estimator.py
@@ -323,7 +323,7 @@ def inference(self, inputs: Tensor, batch_img_metas: List[dict]) -> Tensor:
                 level=logging.WARN)
         if self.test_cfg.mode == 'slide':
             depth_map = self.slide_inference(inputs, batch_img_metas)
-        if self.test_cfg.mode == 'slide_flip':
+        elif self.test_cfg.mode == 'slide_flip':
             depth_map = self.slide_flip_inference(inputs, batch_img_metas)
         else:
             depth_map = self.whole_inference(inputs, batch_img_metas)