diff --git a/tests/quantization/test_quantized_ops.py b/tests/quantization/test_quantized_ops.py
index 052044c0e..fb4f6e5b3 100644
--- a/tests/quantization/test_quantized_ops.py
+++ b/tests/quantization/test_quantized_ops.py
@@ -285,6 +285,9 @@ def test_clip_op(
 ARITH_N_BITS_LIST = [20, 16, 8]
 
 
+# This test is a known flaky (in particular, with the QuantizedDiv operator)
+# FIXME: https://github.com/zama-ai/concrete-ml-internal/issues/4563
+@pytest.mark.flaky
 @pytest.mark.parametrize(
     "operator, supports_enc_with_enc, r2_threshold_bits",
     [