diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index b473c9af0..86d18cbac 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -285,7 +285,7 @@ fn heading(p: &mut Parser, at_start: bool) {
     while p.eat_if(NodeKind::Eq) {}
 
     if at_start && p.peek().map_or(true, |kind| kind.is_space()) {
-        p.eat_while(|kind| kind.is_space());
+        p.eat_while(|kind| kind == &NodeKind::Space(0));
         markup_line(p);
         marker.end(p, NodeKind::Heading);
     } else {
diff --git a/tests/ref/structure/heading.png b/tests/ref/structure/heading.png
index 3e12b2cf4..7ad228ab3 100644
Binary files a/tests/ref/structure/heading.png and b/tests/ref/structure/heading.png differ
diff --git a/tests/ref/structure/list.png b/tests/ref/structure/list.png
index 7a60e1e55..5d0f03c00 100644
Binary files a/tests/ref/structure/list.png and b/tests/ref/structure/list.png differ
diff --git a/tests/typ/structure/heading.typ b/tests/typ/structure/heading.typ
index de95c35b4..496181bd0 100644
--- a/tests/typ/structure/heading.typ
+++ b/tests/typ/structure/heading.typ
@@ -1,5 +1,11 @@
 // Test headings.
 
+---
+#show node: heading as text(blue, node.body)
+
+=
+No heading
+
 ---
 // Different number of equals signs.
 
diff --git a/tests/typ/structure/list.typ b/tests/typ/structure/list.typ
index 77e153c76..5c410a3f3 100644
--- a/tests/typ/structure/list.typ
+++ b/tests/typ/structure/list.typ
@@ -1,5 +1,9 @@
 // Test lists.
 
+---
+-
+No list
+
 ---
 _Shopping list_
 #list(attached: true)[Apples][Potatoes][Juice]