diff --git a/tests/testthat/test-bioc.R b/tests/testthat/test-bioc.R
index db4e0edc..ec1709b7 100644
--- a/tests/testthat/test-bioc.R
+++ b/tests/testthat/test-bioc.R
@@ -10,6 +10,7 @@ test_that("bioc is standalone", {
   funs <- Filter(function(x) is.function(stenv[[x]]), objs)
   funobjs <- mget(funs, stenv)
 
+  skip_if_not_installed("codetools")
   expect_message(
     mapply(codetools::checkUsage, funobjs, funs,
            MoreArgs = list(report = message)),
diff --git a/tests/testthat/test-json.R b/tests/testthat/test-json.R
index 3ebf29a8..6031007e 100644
--- a/tests/testthat/test-json.R
+++ b/tests/testthat/test-json.R
@@ -10,6 +10,7 @@ test_that("JSON is standalone", {
   funs <- Filter(function(x) is.function(stenv[[x]]), objs)
   funobjs <- mget(funs, stenv)
 
+  skip_if_not_installed("codetools")
   expect_message(
     mapply(codetools::checkUsage, funobjs, funs,
            MoreArgs = list(report = message)),