+
This has link:https://example.com[a link] and xref:section[cross ref] and image:photo.png[alt] and footnote:[a note] and [[myanchor]]anchor and [[[bibref]]]biblio as plain text.
+
diff --git a/converters/html/tests/fixtures/source/html/embedded/passthrough_block_subs_override.adoc b/converters/html/tests/fixtures/source/html/embedded/passthrough_block_subs_override.adoc
new file mode 100644
index 00000000..0d057880
--- /dev/null
+++ b/converters/html/tests/fixtures/source/html/embedded/passthrough_block_subs_override.adoc
@@ -0,0 +1,30 @@
+:my-attr: hello world
+
+[subs=normal]
+++++
+This has *bold* and _italic_ and and {my-attr}.
+++++
+
+[subs=none]
+++++
+This has *bold* and and {my-attr}.
+++++
+
+[subs=specialchars]
+++++
+This has *bold* and and {my-attr}.
+++++
+
+[subs=quotes]
+++++
+This has *bold* and and {my-attr}.
+++++
+
+[subs="attributes,specialchars"]
+++++
+This has *bold* and and {my-attr}.
+++++
+
+++++
+Default passthrough: *bold* and and {my-attr}.
+++++
diff --git a/converters/html/tests/fixtures/source/html/embedded/subs_explicit_no_macros.adoc b/converters/html/tests/fixtures/source/html/embedded/subs_explicit_no_macros.adoc
new file mode 100644
index 00000000..1745b044
--- /dev/null
+++ b/converters/html/tests/fixtures/source/html/embedded/subs_explicit_no_macros.adoc
@@ -0,0 +1,2 @@
+[subs=specialchars]
+This has link:https://example.com[text] and macro text.
diff --git a/converters/html/tests/fixtures/source/html/embedded/subs_macros_disabled.adoc b/converters/html/tests/fixtures/source/html/embedded/subs_macros_disabled.adoc
new file mode 100644
index 00000000..250f616d
--- /dev/null
+++ b/converters/html/tests/fixtures/source/html/embedded/subs_macros_disabled.adoc
@@ -0,0 +1,2 @@
+[subs=-macros]
+This has link:https://example.com[a link] and xref:section[cross ref] and image:photo.png[alt] and footnote:[a note] and [[myanchor]]anchor and [[[bibref]]]biblio as plain text.