solved

.Rbuildignore

@@ -1,7 +1,6 @@
 ^.*\.Rproj$
 ^\.Rproj\.user$
-.travis.yml
-codecov.yml
+^codecov\.yml$
 README.md
 ^CRAN-RELEASE$
 ^cran-comments\.md$

DESCRIPTION

@@ -32,10 +32,12 @@ Imports:
     RColorBrewer,
     grDevices
 Suggests:
+    covr,
     condSURV,
     knitr,
     plotly,
     rmarkdown,
-    testthat
+    testthat (>= 3.0.0)
+Config/testthat/edition: 3
 RoxygenNote: 7.3.2
 VignetteBuilder: knitr

codecov.yml

@@ -0,0 +1,21 @@
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+        informational: true
+    patch:
+      default:
+        target: auto
+        threshold: 1%
+        informational: true
+
+comment: false
+language: R
+sudo: false
+cache: packages
+after_success:
+- Rscript -e 'covr::codecov()'
+ignore:
+  - "R/install.R"

tests/testthat.R

@@ -1,5 +1,14 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/tests.html
+# * https://testthat.r-lib.org/reference/test_package.html#special-files
+
 library(testthat)
-library(clustcurv)
-testthat::skip_if_not_installed(testthat::test_check("clustcurv"))
 
+if (identical(Sys.getenv("NOT_CRAN"), "true"))
+  library(clustcurv)
+  test_check("clustcurv")