diff --git a/components/layout/block.rs b/components/layout/block.rs
index 00827a87b47..c8f960dc7cc 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -1104,7 +1104,8 @@ impl BlockFlow {
let screen_size = LogicalSize::from_physical(self.fragment.style.writing_mode,
layout_context.shared.screen_size);
Some(screen_size.block)
- } else if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
+ } else if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) &&
+ self.base.block_container_explicit_block_size.is_none() {
self.base.absolute_cb.explicit_block_containing_size(layout_context)
} else {
self.base.block_container_explicit_block_size
@@ -1329,12 +1330,7 @@ impl BlockFlow {
let mut iterator = self.base.child_iter().enumerate().peekable();
while let Some((i, kid)) = iterator.next() {
- {
- let kid_base = flow::mut_base(kid);
- if !kid_base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
- kid_base.block_container_explicit_block_size = explicit_content_size;
- }
- }
+ flow::mut_base(kid).block_container_explicit_block_size = explicit_content_size;
// Determine float impaction, and update the inline size speculations if necessary.
if flow::base(kid).flags.contains(CLEARS_LEFT) {
diff --git a/tests/ref/abs_rel_explicit_height.html b/tests/ref/abs_rel_explicit_height.html
new file mode 100644
index 00000000000..22d3e25be5a
--- /dev/null
+++ b/tests/ref/abs_rel_explicit_height.html
@@ -0,0 +1,51 @@
+
+
+
+
+
+
+
+
+
diff --git a/tests/ref/abs_rel_explicit_height_ref.html b/tests/ref/abs_rel_explicit_height_ref.html
new file mode 100644
index 00000000000..4e9833c2952
--- /dev/null
+++ b/tests/ref/abs_rel_explicit_height_ref.html
@@ -0,0 +1,20 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index ffaf75fa5ed..c72b458d070 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -9,6 +9,7 @@
# Should be == with expected failure:
fragment=top != ../html/acid2.html acid2_ref.html
+== abs_rel_explicit_height.html abs_rel_explicit_height_ref.html
== absolute_inline_containing_block_a.html absolute_inline_containing_block_ref.html
== acid1_a.html acid1_b.html
== acid2_noscroll.html acid2_ref_broken.html