diff --git a/components/layout_2020/display_list/stacking_context.rs b/components/layout_2020/display_list/stacking_context.rs
index 62e4085086e..ece8502c21e 100644
--- a/components/layout_2020/display_list/stacking_context.rs
+++ b/components/layout_2020/display_list/stacking_context.rs
@@ -986,7 +986,7 @@ impl BoxFragment {
             return Some(StackingContextType::FloatStackingContainer);
         }
 
-        if box_style.display.is_atomic_inline_level() {
+        if self.is_atomic_inline_level() {
             return Some(StackingContextType::AtomicInlineStackingContainer);
         }
 
diff --git a/components/layout_2020/fragment_tree/box_fragment.rs b/components/layout_2020/fragment_tree/box_fragment.rs
index f8f0e233a2f..4e2a38a6232 100644
--- a/components/layout_2020/fragment_tree/box_fragment.rs
+++ b/components/layout_2020/fragment_tree/box_fragment.rs
@@ -12,6 +12,7 @@ use style::computed_values::overflow_x::T as ComputedOverflow;
 use style::computed_values::position::T as ComputedPosition;
 use style::logical_geometry::WritingMode;
 use style::properties::ComputedValues;
+use style::values::specified::box_::DisplayOutside;
 
 use super::{BaseFragment, BaseFragmentInfo, CollapsedBlockMargins, Fragment};
 use crate::formatting_contexts::Baselines;
@@ -348,6 +349,12 @@ impl BoxFragment {
         self.style.is_inline_box(self.base.flags)
     }
 
+    /// Whether this is an atomic inline-level box.
+    /// <https://drafts.csswg.org/css-display-3/#atomic-inline>
+    pub(crate) fn is_atomic_inline_level(&self) -> bool {
+        self.style.get_box().display.outside() == DisplayOutside::Inline && !self.is_inline_box()
+    }
+
     /// Whether this is a table wrapper box.
     /// <https://www.w3.org/TR/css-tables-3/#table-wrapper-box>
     pub(crate) fn is_table_wrapper(&self) -> bool {
diff --git a/tests/wpt/meta/css/css-grid/alignment/grid-gutters-015.html.ini b/tests/wpt/meta/css/css-grid/alignment/grid-gutters-015.html.ini
deleted file mode 100644
index 01fa5d5c83d..00000000000
--- a/tests/wpt/meta/css/css-grid/alignment/grid-gutters-015.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[grid-gutters-015.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-001.html.ini b/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-001.html.ini
deleted file mode 100644
index 4bf18d5d0b2..00000000000
--- a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-001.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[grid-container-baseline-synthesized-001.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-002.html.ini b/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-002.html.ini
deleted file mode 100644
index b1f0ed70bf8..00000000000
--- a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-002.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[grid-container-baseline-synthesized-002.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-003.html.ini b/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-003.html.ini
deleted file mode 100644
index 30e114170b9..00000000000
--- a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-003.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[grid-container-baseline-synthesized-003.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-004.html.ini b/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-004.html.ini
deleted file mode 100644
index 6847ef99a24..00000000000
--- a/tests/wpt/meta/css/css-grid/grid-container-baseline-synthesized-004.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[grid-container-baseline-synthesized-004.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/grid-model/grid-container-scrollbars-sizing-002.html.ini b/tests/wpt/meta/css/css-grid/grid-model/grid-container-scrollbars-sizing-002.html.ini
deleted file mode 100644
index 65f447695c9..00000000000
--- a/tests/wpt/meta/css/css-grid/grid-model/grid-container-scrollbars-sizing-002.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[grid-container-scrollbars-sizing-002.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/subgrid/independent-tracks-from-parent-grid.html.ini b/tests/wpt/meta/css/css-grid/subgrid/independent-tracks-from-parent-grid.html.ini
deleted file mode 100644
index 3797183cdbd..00000000000
--- a/tests/wpt/meta/css/css-grid/subgrid/independent-tracks-from-parent-grid.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[independent-tracks-from-parent-grid.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/subgrid/repeat-auto-fill-005.html.ini b/tests/wpt/meta/css/css-grid/subgrid/repeat-auto-fill-005.html.ini
new file mode 100644
index 00000000000..882d1cfda55
--- /dev/null
+++ b/tests/wpt/meta/css/css-grid/subgrid/repeat-auto-fill-005.html.ini
@@ -0,0 +1,2 @@
+[repeat-auto-fill-005.html]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/subgrid/subgrid-baseline-012.html.ini b/tests/wpt/meta/css/css-grid/subgrid/subgrid-baseline-012.html.ini
deleted file mode 100644
index 59602ca238f..00000000000
--- a/tests/wpt/meta/css/css-grid/subgrid/subgrid-baseline-012.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[subgrid-baseline-012.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-grid/subgrid/subgrid-no-items-on-edges-001.html.ini b/tests/wpt/meta/css/css-grid/subgrid/subgrid-no-items-on-edges-001.html.ini
deleted file mode 100644
index f4d72c5c3f8..00000000000
--- a/tests/wpt/meta/css/css-grid/subgrid/subgrid-no-items-on-edges-001.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[subgrid-no-items-on-edges-001.html]
-  expected: FAIL