diff --git a/test/test_inline_image.rb b/test/test_inline_image.rb
index 96e44fa..2b6d1d5 100644
--- a/test/test_inline_image.rb
+++ b/test/test_inline_image.rb
@@ -18,7 +18,7 @@ def test_image_placement
     assert_xpath_equal xml, 'inline', '//p/image/@placement'
   end
 
-def test_image_with_alt_text
+  def test_image_with_alt_text
     xml = <<~EOF.chomp.to_dita
     A paragraph with a image:image-1.png[first] and image:image-2.png[alt=second] image.
     EOF