diff --git a/testing/web-platform/meta/MANIFEST.json b/testing/web-platform/meta/MANIFEST.json
index 0a735f626f95..5c35bb99fc17 100644
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -49587,6 +49587,18 @@
{}
]
],
+ "css/CSS2/floats/new-fc-beside-adjoining-float-2.html": [
+ [
+ "/css/CSS2/floats/new-fc-beside-adjoining-float-2.html",
+ [
+ [
+ "/css/reference/ref-filled-green-200px-square.html",
+ "=="
+ ]
+ ],
+ {}
+ ]
+ ],
"css/CSS2/floats/new-fc-beside-adjoining-float.html": [
[
"/css/CSS2/floats/new-fc-beside-adjoining-float.html",
@@ -49599,6 +49611,18 @@
{}
]
],
+ "css/CSS2/floats/new-fc-separates-from-float-2.html": [
+ [
+ "/css/CSS2/floats/new-fc-separates-from-float-2.html",
+ [
+ [
+ "/css/reference/ref-filled-green-200px-square.html",
+ "=="
+ ]
+ ],
+ {}
+ ]
+ ],
"css/CSS2/floats/new-fc-separates-from-float.html": [
[
"/css/CSS2/floats/new-fc-separates-from-float.html",
@@ -448586,10 +448610,18 @@
"7287e2ce42cab8fda1f63e97c98b664f0b49e9fb",
"reftest"
],
+ "css/CSS2/floats/new-fc-beside-adjoining-float-2.html": [
+ "3f5a648154f288d3a78038daacb3810662aa8977",
+ "reftest"
+ ],
"css/CSS2/floats/new-fc-beside-adjoining-float.html": [
"f378062671d9de538e54c7dba552c2deab57baa4",
"reftest"
],
+ "css/CSS2/floats/new-fc-separates-from-float-2.html": [
+ "91a4405707130a19100db1ccbaebb41b885531dd",
+ "reftest"
+ ],
"css/CSS2/floats/new-fc-separates-from-float.html": [
"357427f1d71d7137c1ba4c386ae25acc7712928e",
"reftest"
diff --git a/testing/web-platform/tests/css/CSS2/floats/new-fc-beside-adjoining-float-2.html b/testing/web-platform/tests/css/CSS2/floats/new-fc-beside-adjoining-float-2.html
new file mode 100644
index 000000000000..2d27a28a0533
--- /dev/null
+++ b/testing/web-platform/tests/css/CSS2/floats/new-fc-beside-adjoining-float-2.html
@@ -0,0 +1,16 @@
+
+A new formatting context that fits beside an adjoining float, and thus pulls down the float with its top margin
+Test passes if there is a filled green square and no red .
+
diff --git a/testing/web-platform/tests/css/CSS2/floats/new-fc-separates-from-float-2.html b/testing/web-platform/tests/css/CSS2/floats/new-fc-separates-from-float-2.html
new file mode 100644
index 000000000000..fd0deab18e0e
--- /dev/null
+++ b/testing/web-platform/tests/css/CSS2/floats/new-fc-separates-from-float-2.html
@@ -0,0 +1,16 @@
+
+A new formatting context that doesn't fit beside a float make the float non-adjoining
+Test passes if there is a filled green square and no red .
+