diff --git a/DESCRIPTION b/DESCRIPTION
index 57b86d112..818f65abf 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Type: Package
 Package: insight
 Title: Easy Access to Model Information for Various Model Objects
-Version: 0.99.0.21
+Version: 0.99.0.22
 Authors@R:
     c(person(given = "Daniel",
              family = "Lüdecke",
diff --git a/tests/testthat/test-find_formula.R b/tests/testthat/test-find_formula.R
index ecbf97c32..7aa1a904c 100644
--- a/tests/testthat/test-find_formula.R
+++ b/tests/testthat/test-find_formula.R
@@ -24,6 +24,9 @@ test_that("formula warns when using backticks", {
   expect_warning(expect_false(formula_ok(m)), regex = "syntactically")
   expect_silent(expect_true(formula_ok(m, checks = "dollar")))
   expect_error(formula_ok(m, checks = c("dollar", "test")), regex = "invalid options")
+  # null model checks formula
+  expect_warning(null_model(m), regex = "Looks like")
+  expect_silent(null_model(m, verbose = FALSE))
   # message types
   expect_message(expect_false(formula_ok(m, action = "message")), regex = "syntactically")
   expect_error(expect_false(formula_ok(m, action = "error")), regex = "syntactically")