diff --git a/data/test.csv b/data/test.csv
index 54f13dd..f6de56c 100644
--- a/data/test.csv
+++ b/data/test.csv
@@ -28,3 +28,4 @@ Incorrect ISO 639-1 language,2019-09-26,,,es,,,
 Incorrect ISO 639-3 language,2019-09-26,,,spa,,,
 Composéd Unicode,2020-01-14,,,,,,
 Decomposéd Unicode,2020-01-14,,,,,,
+Unnecessary multi-value separator,2021-01-03,0378-5955||,,,,,