diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index 838dd1e670e..fd5d92ec839 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -13,8 +13,6 @@ fragment=top != ../html/acid2.html acid2_ref.html
flaky_cpu == append_style_a.html append_style_b.html
# `?` and `#` in the name is a test for https://github.com/servo/servo/issues/3340
-# Should be == with expected failure. See #2797
-!= overconstrained_block.html overconstrained_block_ref.html
# Should be ==?
!= overflow_position_abs_inside_normal_a.html overflow_position_abs_inside_normal_b.html
resolution=300x300,device-pixel-ratio=2 != pixel_snapping_border_a.html pixel_snapping_border_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index e8e11e66207..e2b7aa33d2d 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -3247,6 +3247,18 @@
"url": "/_mozilla/css/outset_blackborder.html"
}
],
+ "css/overconstrained_block.html": [
+ {
+ "path": "css/overconstrained_block.html",
+ "references": [
+ [
+ "/_mozilla/css/overconstrained_block_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/overconstrained_block.html"
+ }
+ ],
"css/overflow_auto.html": [
{
"path": "css/overflow_auto.html",
@@ -8958,6 +8970,18 @@
"url": "/_mozilla/css/outset_blackborder.html"
}
],
+ "css/overconstrained_block.html": [
+ {
+ "path": "css/overconstrained_block.html",
+ "references": [
+ [
+ "/_mozilla/css/overconstrained_block_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/overconstrained_block.html"
+ }
+ ],
"css/overflow_auto.html": [
{
"path": "css/overflow_auto.html",
diff --git a/tests/ref/overconstrained_block.html b/tests/wpt/mozilla/tests/css/overconstrained_block.html
similarity index 90%
rename from tests/ref/overconstrained_block.html
rename to tests/wpt/mozilla/tests/css/overconstrained_block.html
index 83728b44652..3cad163dab5 100644
--- a/tests/ref/overconstrained_block.html
+++ b/tests/wpt/mozilla/tests/css/overconstrained_block.html
@@ -1,6 +1,7 @@
Block with over-contrained margins+borders+padding+width = containing block width
+
-
-
-
-
+
+
+
+
+