diff --git a/components/layout/display_list_builder.rs b/components/layout/display_list_builder.rs
index 49c140cbedb..d9da32cf69b 100644
--- a/components/layout/display_list_builder.rs
+++ b/components/layout/display_list_builder.rs
@@ -1594,11 +1594,8 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
scroll_policy,
StackingContextCreationMode::Normal))
} else {
- match self.fragment.style.get_box().position {
- position::T::static_ => {}
- _ => {
- display_list.form_pseudo_stacking_context_for_positioned_content();
- }
+ if self.fragment.style.get_box().position != position::T::static_ {
+ display_list.form_pseudo_stacking_context_for_positioned_content();
}
DisplayListBuildingResult::Normal(display_list)
}
@@ -1717,6 +1714,9 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
ScrollPolicy::Scrollable,
StackingContextCreationMode::Normal))
} else {
+ if self.fragment.style.get_box().position != position::T::static_ {
+ display_list.form_pseudo_stacking_context_for_positioned_content();
+ }
DisplayListBuildingResult::Normal(display_list)
}
}
diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index c9067f5569d..174a7a645b8 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -113,6 +113,7 @@ prefs:"layout.flex.enabled" == flex_row_direction.html flex_row_direction_ref.ht
== float_intrinsic_height.html float_intrinsic_height_ref.html
== float_intrinsic_width_a.html float_intrinsic_width_ref.html
== float_overflow_area_a.html float_overflow_area_ref.html
+== float_positioned_pseudo_stacking_context.html float_positioned_pseudo_stacking_context_ref.html
== float_right_intrinsic_width_a.html float_right_intrinsic_width_ref.html
== float_table_a.html float_table_ref.html
== float_under_top_margin_a.html float_under_top_margin_ref.html
diff --git a/tests/ref/float_positioned_pseudo_stacking_context.html b/tests/ref/float_positioned_pseudo_stacking_context.html
new file mode 100644
index 00000000000..567608dee9a
--- /dev/null
+++ b/tests/ref/float_positioned_pseudo_stacking_context.html
@@ -0,0 +1,29 @@
+
+
+
+
+
+
+
+
diff --git a/tests/ref/float_positioned_pseudo_stacking_context_ref.html b/tests/ref/float_positioned_pseudo_stacking_context_ref.html
new file mode 100644
index 00000000000..ca58764705c
--- /dev/null
+++ b/tests/ref/float_positioned_pseudo_stacking_context_ref.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+
+
+
diff --git a/tests/wpt/metadata-css/css21_dev/html4/anonymous-boxes-001.htm.ini b/tests/wpt/metadata-css/css21_dev/html4/anonymous-boxes-001.htm.ini
deleted file mode 100644
index 9b3d62e725c..00000000000
--- a/tests/wpt/metadata-css/css21_dev/html4/anonymous-boxes-001.htm.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[anonymous-boxes-001.htm]
- type: reftest
- expected: FAIL