diff --git a/tests/ref/basic.list b/tests/ref/basic.list
index cdc448a8173..06b8a89c062 100644
--- a/tests/ref/basic.list
+++ b/tests/ref/basic.list
@@ -13,7 +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
-== iframe/simple_inline_height.html iframe/simple_inline_height_ref.html
== iframe/simple_inline_max.html iframe/simple_inline_max_ref.html
== iframe/simple_inline_min.html iframe/simple_inline_min_ref.html
== iframe/simple_inline_width.html iframe/simple_inline_width_ref.html
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index a0758e89e18..43fc1422cd4 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -1687,6 +1687,18 @@
"url": "/_mozilla/css/iframe/simple_inline_default.html"
}
],
+ "css/iframe/simple_inline_height.html": [
+ {
+ "path": "css/iframe/simple_inline_height.html",
+ "references": [
+ [
+ "/_mozilla/css/iframe/simple_inline_height_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/iframe/simple_inline_height.html"
+ }
+ ],
"css/image_rendering_auto_a.html": [
{
"path": "css/image_rendering_auto_a.html",
@@ -7254,6 +7266,18 @@
"url": "/_mozilla/css/iframe/simple_inline_default.html"
}
],
+ "css/iframe/simple_inline_height.html": [
+ {
+ "path": "css/iframe/simple_inline_height.html",
+ "references": [
+ [
+ "/_mozilla/css/iframe/simple_inline_height_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/iframe/simple_inline_height.html"
+ }
+ ],
"css/image_rendering_auto_a.html": [
{
"path": "css/image_rendering_auto_a.html",
diff --git a/tests/ref/iframe/simple_inline_height.html b/tests/wpt/mozilla/tests/css/iframe/simple_inline_height.html
similarity index 83%
rename from tests/ref/iframe/simple_inline_height.html
rename to tests/wpt/mozilla/tests/css/iframe/simple_inline_height.html
index be28febf1ef..22c0ef4c393 100644
--- a/tests/ref/iframe/simple_inline_height.html
+++ b/tests/wpt/mozilla/tests/css/iframe/simple_inline_height.html
@@ -1,4 +1,5 @@
+