diff --git a/components/layout/block.rs b/components/layout/block.rs
index d3211d89c79..f803580bfb0 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -1646,8 +1646,12 @@ impl Flow for BlockFlow {
fn assign_block_size<'a>(&mut self, ctx: &'a LayoutContext<'a>) {
if self.is_replaced_content() {
+ let _scope = layout_debug_scope!("assign_replaced_block_size_if_necessary {:s}",
+ self.base.debug_id());
+
// Assign block-size for fragment if it is an image fragment.
self.fragment.assign_replaced_block_size_if_necessary();
+ self.base.position.size.block = self.fragment.border_box.size.block;
} else if self.is_float() {
debug!("assign_block_size_float: assigning block_size for float");
self.assign_block_size_float(ctx);
diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 9ce245a914d..7f5a9ee7fa6 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -133,3 +133,4 @@ flaky_gpu,flaky_linux == acid2_noscroll.html acid2_ref_broken.html
== percent_height.html percent_height_ref.html
== inline_block_with_margin_a.html inline_block_with_margin_ref.html
== table_padding_a.html table_padding_ref.html
+== img_block_display_a.html img_block_display_ref.html
diff --git a/tests/ref/img_block_display_a.html b/tests/ref/img_block_display_a.html
new file mode 100644
index 00000000000..be879b37b4c
--- /dev/null
+++ b/tests/ref/img_block_display_a.html
@@ -0,0 +1,25 @@
+
+
+
+
+
+
+
+ A
+
+
diff --git a/tests/ref/img_block_display_ref.html b/tests/ref/img_block_display_ref.html
new file mode 100644
index 00000000000..3db4356a529
--- /dev/null
+++ b/tests/ref/img_block_display_ref.html
@@ -0,0 +1,21 @@
+
+
+
+
+
+
+
+
+
+
