diff --git a/tests/python/unittest/test_io.py b/tests/python/unittest/test_io.py
index 4dfa69cc1050..ddb06f9052bb 100644
--- a/tests/python/unittest/test_io.py
+++ b/tests/python/unittest/test_io.py
@@ -309,6 +309,7 @@ def test_DataBatch():
         'DataBatch: data shapes: \[\(2L?, 3L?\), \(7L?, 8L?\)\] label shapes: \[\(4L?, 5L?\)\]', str(batch)))
 
 
+@unittest.skip("Broken test: https://github.com/apache/incubator-mxnet/issues/12139")
 def test_CSVIter():
     def check_CSVIter_synthetic(dtype='float32'):
         cwd = os.getcwd()