diff --git a/neo/test/iotest/test_asciisignalio.py b/neo/test/iotest/test_asciisignalio.py
index 4e6a03754..20e587112 100644
--- a/neo/test/iotest/test_asciisignalio.py
+++ b/neo/test/iotest/test_asciisignalio.py
@@ -55,7 +55,7 @@ def test_csv_expect_success(self):
             (-64.6, -64.2, -77.0, 0.7),
             (-64.3, -64.0, -99.9, 0.8)
         ]
-        with open(filename, 'w') as csvfile:
+        with open(filename, 'w', newline='') as csvfile:
             writer = csv.writer(csvfile, delimiter=',',
                                 quotechar='|', quoting=csv.QUOTE_MINIMAL)
             for row in sample_data: