diff --git a/glymur/test/test_jp2k.py b/glymur/test/test_jp2k.py
index 6e328e0..c8e5714 100644
--- a/glymur/test/test_jp2k.py
+++ b/glymur/test/test_jp2k.py
@@ -854,6 +854,23 @@ class TestJp2kOpjDataRootWarnings(unittest.TestCase):
 class TestJp2kOpjDataRoot(unittest.TestCase):
     """These tests should be run by just about all configuration."""
 
+    @unittest.skipIf(os.name == "nt", "NamedTemporaryFile issue on windows")
+    def test_irreversible(self):
+        """Irreversible"""
+        filename = opj_data_file('input/nonregression/issue141.rawl')
+        expdata = np.fromfile(filename, dtype=np.uint16)
+        expdata.resize((2816, 2048))
+        with tempfile.NamedTemporaryFile(suffix='.j2k') as tfile:
+            j = Jp2k(tfile.name, 'wb')
+            j.write(expdata, irreversible=True)
+
+            codestream = j.get_codestream()
+            self.assertEqual(codestream.segment[2].spcod[8],
+                             glymur.core.WAVELET_XFORM_9X7_IRREVERSIBLE)
+
+            actdata = j.read()
+            self.assertTrue(fixtures.mse(actdata, expdata) < 250)
+
     def test_no_cxform_pclr_jp2(self):
         """Indices for pclr jpxfile if no color transform"""
         filename = opj_data_file('input/conformance/file9.jp2')