diff --git a/test/mihainator/extractor_test.exs b/test/mihainator/extractor_test.exs
new file mode 100644
index 0000000..50cbe2c
--- /dev/null
+++ b/test/mihainator/extractor_test.exs
@@ -0,0 +1,31 @@
+defmodule Mihainator.ExtractorTest do
+  @moduledoc false
+
+  use ExUnit.Case, async: true
+
+  alias Mihainator.Extractor
+
+  @test_file Path.join([File.cwd!(), "data", "test.csv"])
+
+  test "should get a full year of sorted months" do
+    expected = [
+      "2021-12",
+      "2022-01",
+      "2022-02",
+      "2022-03",
+      "2022-04",
+      "2022-05",
+      "2022-06",
+      "2022-07",
+      "2022-08",
+      "2022-09",
+      "2022-10",
+      "2022-11",
+      "2022-12"
+    ]
+
+    result = Extractor.extract(@test_file)
+
+    assert Map.keys(result) == expected
+  end
+end
diff --git a/test/mihainator_web/controllers/page_controller_test.exs b/test/mihainator_web/controllers/page_controller_test.exs
deleted file mode 100644
index 005e5ef..0000000
--- a/test/mihainator_web/controllers/page_controller_test.exs
+++ /dev/null
@@ -1,8 +0,0 @@
-defmodule MihainatorWeb.PageControllerTest do
-  use MihainatorWeb.ConnCase
-
-  test "GET /", %{conn: conn} do
-    conn = get(conn, ~p"/")
-    assert html_response(conn, 200) =~ "Peace of mind from prototype to production"
-  end
-end