diff --git a/tests/fixtures/docs/index.md b/tests/fixtures/docs/index.md
index e3c6ed3..16d31f0 100644
--- a/tests/fixtures/docs/index.md
+++ b/tests/fixtures/docs/index.md
@@ -2,4 +2,6 @@
 
 Our image:
 
-*![our image caption](github-octocat.png)*
+*![our image caption 1](github-octocat.png)*
+
+_![our image caption 2](github-octocat.png)_
diff --git a/tests/test_plugin.py b/tests/test_plugin.py
index 0f1d01d..3a8ccc6 100644
--- a/tests/test_plugin.py
+++ b/tests/test_plugin.py
@@ -85,4 +85,5 @@ def test_img2fig_output(tmp_path):
     assert os.path.exists(index_file), "%s does not exist" % index_file
 
     contents = pathlib.Path(index_file).read_text()
-    assert "<figcaption>our image caption</figcaption>" in contents
+    assert "<figcaption>our image caption 1</figcaption>" in contents
+    assert "<figcaption>our image caption 2</figcaption>" in contents