diff --git a/testing/web-platform/tests/css/css-borders/border-width-rounding.tentative.html b/testing/web-platform/tests/css/css-borders/border-width-rounding.tentative.html
new file mode 100644
index 0000000000000..04c4ddf40bd74
--- /dev/null
+++ b/testing/web-platform/tests/css/css-borders/border-width-rounding.tentative.html
@@ -0,0 +1,53 @@
+
+
+
+
+ CSS Border: width rounding
+
+
+
+
+
+
+
+
+
+
+
+
+ Test passes if border widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-borders/reference/subpixel-border-width-ref.tentative.html b/testing/web-platform/tests/css/css-borders/reference/subpixel-border-width-ref.tentative.html
new file mode 100644
index 0000000000000..3ba8ac5754ef7
--- /dev/null
+++ b/testing/web-platform/tests/css/css-borders/reference/subpixel-border-width-ref.tentative.html
@@ -0,0 +1,44 @@
+
+
+
+
+ CSS Border: width computed value
+
+
+
+
+
+
+
+
+
+ Test passes if border widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-borders/subpixel-border-width.tentative.html b/testing/web-platform/tests/css/css-borders/subpixel-border-width.tentative.html
new file mode 100644
index 0000000000000..d056c01c914c8
--- /dev/null
+++ b/testing/web-platform/tests/css/css-borders/subpixel-border-width.tentative.html
@@ -0,0 +1,48 @@
+
+
+
+
+ CSS Border: width computed value
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Test passes if border widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-multicol/reference/subpixel-column-rule-width-ref.tentative.html b/testing/web-platform/tests/css/css-multicol/reference/subpixel-column-rule-width-ref.tentative.html
new file mode 100644
index 0000000000000..47300675fb843
--- /dev/null
+++ b/testing/web-platform/tests/css/css-multicol/reference/subpixel-column-rule-width-ref.tentative.html
@@ -0,0 +1,92 @@
+
+
+
+
+
+ CSS Column-Rule: width computed value
+
+
+
+
+
+
+
+
+
+ Test passes if column rule widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-multicol/subpixel-column-rule-width.tentative.html b/testing/web-platform/tests/css/css-multicol/subpixel-column-rule-width.tentative.html
new file mode 100644
index 0000000000000..5b35c2802c6b3
--- /dev/null
+++ b/testing/web-platform/tests/css/css-multicol/subpixel-column-rule-width.tentative.html
@@ -0,0 +1,94 @@
+
+
+
+
+ CSS Column-Rule: width computed value
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Test passes if column rule widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
+ Lorem ipsum dolor sit amet,
+ consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt
+ ut labore et dolore magna aliqua.
+
+
+
diff --git a/testing/web-platform/tests/css/css-outline/outline-width-rounding.tentative.html b/testing/web-platform/tests/css/css-outline/outline-width-rounding.tentative.html
new file mode 100644
index 0000000000000..162d938cf9c48
--- /dev/null
+++ b/testing/web-platform/tests/css/css-outline/outline-width-rounding.tentative.html
@@ -0,0 +1,53 @@
+
+
+
+
+ CSS Outline: width rounding
+
+
+
+
+
+
+
+
+
+
+
+
+ Test passes if outline widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-outline/reference/subpixel-outline-width-ref.tentative.html b/testing/web-platform/tests/css/css-outline/reference/subpixel-outline-width-ref.tentative.html
new file mode 100644
index 0000000000000..28d84fabb7775
--- /dev/null
+++ b/testing/web-platform/tests/css/css-outline/reference/subpixel-outline-width-ref.tentative.html
@@ -0,0 +1,44 @@
+
+
+
+
+ CSS Outline: width computed value
+
+
+
+
+
+
+
+
+
+ Test passes if outline widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-outline/subpixel-outline-width.tentative.html b/testing/web-platform/tests/css/css-outline/subpixel-outline-width.tentative.html
new file mode 100644
index 0000000000000..a9fc0c49cf3e4
--- /dev/null
+++ b/testing/web-platform/tests/css/css-outline/subpixel-outline-width.tentative.html
@@ -0,0 +1,48 @@
+
+
+
+
+ CSS Outline: width computed value
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Test passes if outline widths are rounded up
+ when they are greater than 0 and less than 1,
+ and rounded down when they are greater than 1.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003-ref.html b/testing/web-platform/tests/css/css-tables/reference/subpixel-collapsed-borders-003-ref.html
similarity index 75%
rename from testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003-ref.html
rename to testing/web-platform/tests/css/css-tables/reference/subpixel-collapsed-borders-003-ref.html
index 78e0be389393e..46049a0f1bff6 100644
--- a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003-ref.html
+++ b/testing/web-platform/tests/css/css-tables/reference/subpixel-collapsed-borders-003-ref.html
@@ -12,7 +12,8 @@
}
-There should be a square with a green border, not a red border.
+
+ There should be a square with a green border, not a red border.
diff --git a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003.html b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003.html
index e22df9e51a6a3..601e1006c1593 100644
--- a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003.html
+++ b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003.html
@@ -3,23 +3,24 @@
-
-
+
+
-There should be a square with a green border, not a red border.
+
+ There should be a square with a green border, not a red border.
diff --git a/testing/web-platform/tests/css/css-ui/parsing/outline-width-computed.html b/testing/web-platform/tests/css/css-ui/parsing/outline-width-computed.html
index abd5826bbb387..ecb719bd758cd 100644
--- a/testing/web-platform/tests/css/css-ui/parsing/outline-width-computed.html
+++ b/testing/web-platform/tests/css/css-ui/parsing/outline-width-computed.html
@@ -24,7 +24,7 @@