diff --git a/tdc/test/test_model_server.py b/tdc/test/test_model_server.py
index 3ccd56c0..c2240ee9 100644
--- a/tdc/test/test_model_server.py
+++ b/tdc/test/test_model_server.py
@@ -106,6 +106,7 @@ def testGeneformerTokenizer(self):
         input_tensor = torch.tensor(cells)
         input_tensor = torch.squeeze(input_tensor)
         try:
+            input_tensor.squeeze(2)  # last dim is zero
             out = model(input_tensor)
         except Exception as e:
             raise Exception("tensor shape is", input_tensor.shape, "exception was:", e)