diff --git a/tests/io/test_read_ebas.py b/tests/io/test_read_ebas.py
index c5acbdb2b..598644d85 100644
--- a/tests/io/test_read_ebas.py
+++ b/tests/io/test_read_ebas.py
@@ -331,6 +331,7 @@ def test_PROVIDES_VARIABLES(reader: ReadEbas):
         "proxydryno3f",
         "proxydryo3",
         "proxydryoxs",
+        "proxydryss",
         "proxydrypm10",
         "proxydrypm25",
         "proxydryrdn",