diff --git a/DESCRIPTION b/DESCRIPTION
index fdf1e4b..9c81dcf 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -19,6 +19,8 @@ Imports:
     tibble,
     tidyr
 Suggests:
-    jsonlite
+    jsonlite,
+    testthat (>= 3.0.0)
 URL: https://rfsaldanha.github.io/rspell/
 BugReports: https://github.com/rfsaldanha/rspell/issues
+Config/testthat/edition: 3
diff --git a/tests/testthat.R b/tests/testthat.R
new file mode 100644
index 0000000..ffe1c1a
--- /dev/null
+++ b/tests/testthat.R
@@ -0,0 +1,12 @@
+# 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/testing-design.html#sec-tests-files-overview
+# * https://testthat.r-lib.org/articles/special-files.html
+
+library(testthat)
+library(rspell)
+
+test_check("rspell")
diff --git a/tests/testthat/test-check_text.R b/tests/testthat/test-check_text.R
new file mode 100644
index 0000000..638d886
--- /dev/null
+++ b/tests/testthat/test-check_text.R
@@ -0,0 +1,25 @@
+text_string <- "O rato roeu a roupa do rei de roma."
+
+test_that("expect error if text is not set", {
+  expect_error(check_text(text = NULL))
+})
+
+test_that("expect error if text is not character", {
+  expect_error(check_text(text = TRUE))
+})
+
+test_that("expect error if language is not set", {
+  expect_error(check_text(text = text_string, language = NULL))
+})
+
+test_that("expect error if language is not set", {
+  expect_error(check_text(text = text_string, language = NULL))
+})
+
+test_that("expect error if language if not supported", {
+  expect_error(check_text(text = text_string, language = "blabla"))
+})
+
+test_that("expect a tibble as responde", {
+  expect_true(tibble::is_tibble(check_text(text = text_string, language = "pt-BR")))
+})