diff --git a/tests/testthat/test_factory.R b/tests/testthat/test_factory.R
index 04874a44..e5c3481f 100644
--- a/tests/testthat/test_factory.R
+++ b/tests/testthat/test_factory.R
@@ -110,3 +110,27 @@ test_that("custom factory works", {
     predictFun(mod.test, X.test)
   )
 })
+
+
+# test_that("custom cpp factory works", {
+#   
+#   suppressWarnings(
+#     Rcpp::sourceCpp("../../external_test_files/custom_cpp_learner.cpp")
+#   )
+#   
+#   set.seed(pi)
+#   X = matrix(1:10, ncol = 1)
+#   y = 3 * as.numeric(X) + rnorm(10, 0, 2)
+#   
+#   X.test = as.matrix(runif(200))
+#   
+#   custom.cpp.factory = CustomCppFactory$new(X, "my_variable_name", dataFunSetter(),
+#     trainFunSetter(), predictFunSetter())
+#   
+#   custom.cpp.factory$testTrain(y)
+#   
+#   expect_equal(custom.cpp.factory$getData(), X)
+#   expect_equal(custom.cpp.factory$testGetParameter(), solve(t(X) %*% X) %*% t(X) %*% y)
+#   expect_equal(custom.cpp.factory$testPredict(), X %*% solve(t(X) %*% X) %*% t(X) %*% y)
+#   expect_equal(custom.cpp.factory$testPredictNewdata(X.test), X.test %*% solve(t(X) %*% X) %*% t(X) %*% y)
+# })
\ No newline at end of file