diff --git a/tests/helpers.lua b/tests/helpers.lua
index 1582bdd..89742f9 100644
--- a/tests/helpers.lua
+++ b/tests/helpers.lua
@@ -162,4 +162,9 @@ Helpers.new_child_neovim = function()
   return child
 end
 
+function Helpers.init_plugin(child, config)
+  config = config or ""
+  child.lua([[require('text-transform').setup(]] .. config .. [[)]])
+end
+
 return Helpers
diff --git a/tests/test_config.lua b/tests/test_config.lua
index 7997a61..0a10a3c 100644
--- a/tests/test_config.lua
+++ b/tests/test_config.lua
@@ -55,14 +55,17 @@ T["setup()"]["sets exposed methods and default options value"] = function()
 end
 
 T["setup()"]["overrides default values"] = function()
-  child.lua([[require('text-transform').setup({
+  helpers.init_plugin(
+    child,
+    [[{
         -- write all the options with a value different than the default ones
         debug = true,
         keymap = {
           ["v"] = "<leader>c",
           ["n"] = "<leader>c",
         },
-    })]])
+    }]]
+  )
 
   -- assert the value, and the type
   eq_type_config(child, "debug", "boolean")
diff --git a/tests/test_popups.lua b/tests/test_popups.lua
new file mode 100644
index 0000000..5d5d0c2
--- /dev/null
+++ b/tests/test_popups.lua
@@ -0,0 +1,63 @@
+local helpers = dofile("tests/helpers.lua")
+local MiniTest = require("mini.test")
+
+-- See https://github.com/echasnovski/mini.nvim/blob/main/lua/mini/test.lua for more documentation
+
+local child = helpers.new_child_neovim()
+local eq_global, eq_config, eq_state =
+  helpers.expect.global_equality, helpers.expect.config_equality, helpers.expect.state_equality
+local eq_type_global, eq_type_config, eq_type_state =
+  helpers.expect.global_type_equality,
+  helpers.expect.config_type_equality,
+  helpers.expect.state_type_equality
+
+local T = MiniTest.new_set({
+  hooks = {
+    -- This will be executed before every (even nested) case
+    pre_case = function()
+      -- Restart child process with custom 'init.lua' script
+      child.restart({ "-u", "scripts/minimal_init.lua" })
+    end,
+    -- This will be executed one after all tests from this set are finished
+    post_once = child.stop,
+  },
+})
+
+-- Tests related to the `setup` method.
+T["popups"] = MiniTest.new_set()
+
+T["popups"]["exposes show_popup"] = function()
+  helpers.init_plugin(child)
+
+  eq_type_global(child, "_G.TextTransform", "table")
+
+  eq_type_global(child, "_G.TextTransform.show_popup", "function")
+
+  eq_type_global(child, "_G.TextTransform.telescope_popup", "nil")
+end
+
+T["popups"]["telescope exposes telescope_popup"] = function()
+  helpers.init_plugin(child)
+
+  eq_type_global(child, "_G.TextTransform", "table")
+
+  eq_type_global(child, "_G.TextTransform.telescope_popup", "nil")
+
+  child.lua([[Telescope = require('text-transform.telescope')]])
+
+  eq_type_global(child, "Telescope.telescope_popup", "function")
+end
+
+T["popups"]["select exposes select_popup"] = function()
+  helpers.init_plugin(child)
+
+  eq_type_global(child, "_G.TextTransform", "table")
+
+  eq_type_global(child, "_G.TextTransform.select_popup", "nil")
+
+  child.lua([[Select = require('text-transform.select')]])
+
+  eq_type_global(child, "Select.select_popup", "function")
+end
+
+return T
diff --git a/tests/test_to_words.lua b/tests/test_to_words.lua
index f748151..33a7cd4 100644
--- a/tests/test_to_words.lua
+++ b/tests/test_to_words.lua
@@ -24,7 +24,7 @@ local T = MiniTest.new_set({
 })
 
 local function test_string(child, str)
-  child.lua([[require('text-transform').setup()]])
+  helpers.init_plugin(child)
   child.lua([[result = require('text-transform').to_words("]] .. str .. [[")]])
 end