diff --git a/modules/ext.cite.style.css b/modules/ext.cite.style.css
index 9b2581223..af0d7faaa 100644
--- a/modules/ext.cite.style.css
+++ b/modules/ext.cite.style.css
@@ -1,5 +1,9 @@
 /* CSS for Parsoid Cite extension */
 
+/* Parsoid HTML emits <sup> tags for follows uses even though there is
+ * no visible output for follows. Parsoid does this to ensure it can
+ * roundtrip back the source wikitext after edits.
+ * However, since this HTML should not be rendered, we use CSS to hide it */
 .mw-ref-follow {
 	display: none;
 }
diff --git a/tests/parser/citeParserTests.txt b/tests/parser/citeParserTests.txt
index 395255414..cc48565a1 100644
--- a/tests/parser/citeParserTests.txt
+++ b/tests/parser/citeParserTests.txt
@@ -3,6 +3,10 @@ version=2
 parsoid-compatible=wt2html
 !! end
 
+# NOTE about Parsoid HTML for cite tests with follows.
+# Parsoid HTML has <sup>s for follows because it needs to be able to roundtrip it back.
+# This output is hidden from read views via CSS in ext.cite.style.css.
+
 # Force the test runner to ensure the extension is loaded
 !! hooks
 ref