diff --git a/tests/testthat/test_NMdataConf.R b/tests/testthat/test_NMdataConf.R
index 7de446e0..fb945329 100644
--- a/tests/testthat/test_NMdataConf.R
+++ b/tests/testthat/test_NMdataConf.R
@@ -129,6 +129,7 @@ test_that("deprecated use.rds",{
     new <- NMdataConf()
     
     new$as.fun <- NULL
+    new$file.cov <- NULL
     new$file.mod <- NULL
     new$file.ext <- NULL
     new$file.phi <- NULL