diff --git a/tests/epanet-nrtestsuite/tests/small/JEP5-13.INP b/tests/epanet-nrtestsuite/tests/small/JEP5-13.inp
similarity index 100%
rename from tests/epanet-nrtestsuite/tests/small/JEP5-13.INP
rename to tests/epanet-nrtestsuite/tests/small/JEP5-13.inp