diff --git a/test/test_jekyll-toc.rb b/test/test_jekyll-toc.rb
new file mode 100644
index 0000000..f32ea23
--- /dev/null
+++ b/test/test_jekyll-toc.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class TestTableOfContentsFilter < Minitest::Test
+  include Jekyll::TableOfContentsFilter
+
+  DUMMY_HTML = "<div>Dummy HTML Content</div>"
+  
+  def setup
+    stubbed_context = Struct.new(:registers)
+    @context = stubbed_context.new(page: "xxx")
+    @context
+  end
+
+  def test_toc_only
+    assert_empty toc_only(DUMMY_HTML)
+  end
+
+  def test_inject_anchors
+    assert_equal inject_anchors(DUMMY_HTML), DUMMY_HTML
+  end
+
+  def test_toc
+    assert_equal toc(DUMMY_HTML), DUMMY_HTML
+  end
+end