diff --git a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-001.html b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-001.html
new file mode 100644
index 000000000000..659b1ee417e7
--- /dev/null
+++ b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-001.html
@@ -0,0 +1,273 @@
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+=
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diff --git a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-002.html b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-002.html
new file mode 100644
index 000000000000..acc6f0f1459d
--- /dev/null
+++ b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-002.html
@@ -0,0 +1,284 @@
+<
+!
+DOCTYPE
+html
+>
+<
+link
+rel
+=
+"
+author
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+title
+=
+"
+David
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+"
+href
+=
+"
+mailto
+:
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+.
+org
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+=
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diff --git a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003-ref.html b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003-ref.html
new file mode 100644
index 000000000000..6da4e213a5d6
--- /dev/null
+++ b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003-ref.html
@@ -0,0 +1,88 @@
+<
+!
+DOCTYPE
+html
+>
+<
+style
+>
+table
+{
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+95px
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+}
+td
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+}
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+/
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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
new file mode 100644
index 000000000000..5ef2cc43a301
--- /dev/null
+++ b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-003.html
@@ -0,0 +1,290 @@
+<
+!
+DOCTYPE
+html
+>
+<
+link
+rel
+=
+"
+author
+"
+title
+=
+"
+David
+Grogan
+"
+href
+=
+"
+mailto
+:
+dgrogan
+chromium
+.
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+"
+>
+<
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+rel
+=
+"
+help
+"
+href
+=
+"
+https
+:
+/
+/
+www
+.
+w3
+.
+org
+/
+TR
+/
+CSS22
+/
+tables
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+html
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+-
+borders
+"
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+=
+"
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+"
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+=
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+/
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+.
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+=
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+=
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+:
+/
+/
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+.
+com
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+=
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+=
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+-
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+-
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+-
+ref
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+=
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+flags
+"
+content
+=
+"
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+/
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+=
+"
+assert
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+=
+"
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+than
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+}
+td
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+;
+border
+:
+5px
+solid
+red
+;
+}
+<
+/
+style
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+<
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+<
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diff --git a/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-ref.html b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-ref.html
new file mode 100644
index 000000000000..3028c8c81b9b
--- /dev/null
+++ b/testing/web-platform/tests/css/css-tables/subpixel-collapsed-borders-ref.html
@@ -0,0 +1,86 @@
+<
+!
+DOCTYPE
+html
+>
+<
+style
+>
+table
+{
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+}
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+:
+1px
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+}
+<
+/
+style
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