diff --git a/testing/web-platform/meta/html/dom/reflection-tabular.html.ini b/testing/web-platform/meta/html/dom/reflection-tabular.html.ini
index 2f144b087047..e4fb28151c71 100644
--- a/testing/web-platform/meta/html/dom/reflection-tabular.html.ini
+++ b/testing/web-platform/meta/html/dom/reflection-tabular.html.ini
@@ -246,45 +246,21 @@
   [td.tabIndex: IDL set to -2147483648 followed by IDL get]
     expected: FAIL
 
-  [td.colSpan: setAttribute() to -36 followed by getAttribute()]
-    expected: FAIL
-
-  [td.colSpan: setAttribute() to -1 followed by getAttribute()]
-    expected: FAIL
-
-  [td.colSpan: setAttribute() to 2147483647 followed by getAttribute()]
-    expected: FAIL
-
   [td.colSpan: setAttribute() to 2147483647 followed by IDL get]
     expected: FAIL
 
-  [td.colSpan: setAttribute() to "-1" followed by getAttribute()]
-    expected: FAIL
-
   [td.colSpan: setAttribute() to object "3" followed by getAttribute()]
     expected: FAIL
 
   [td.colSpan: setAttribute() to object "3" followed by IDL get]
     expected: FAIL
 
-  [td.colSpan: IDL set to 2147483647 followed by getAttribute()]
-    expected: FAIL
-
   [td.colSpan: IDL set to 2147483647 followed by IDL get]
     expected: FAIL
 
-  [td.rowSpan: setAttribute() to -36 followed by getAttribute()]
-    expected: FAIL
-
-  [td.rowSpan: setAttribute() to -1 followed by getAttribute()]
-    expected: FAIL
-
   [td.rowSpan: setAttribute() to 2147483647 followed by IDL get]
     expected: FAIL
 
-  [td.rowSpan: setAttribute() to "-1" followed by getAttribute()]
-    expected: FAIL
-
   [td.rowSpan: setAttribute() to object "3" followed by getAttribute()]
     expected: FAIL
 
@@ -306,15 +282,6 @@
   [th.tabIndex: IDL set to -2147483648 followed by IDL get]
     expected: FAIL
 
-  [th.colSpan: setAttribute() to -36 followed by getAttribute()]
-    expected: FAIL
-
-  [th.colSpan: setAttribute() to -1 followed by getAttribute()]
-    expected: FAIL
-
-  [th.colSpan: setAttribute() to 2147483647 followed by getAttribute()]
-    expected: FAIL
-
   [th.colSpan: setAttribute() to 2147483647 followed by IDL get]
     expected: FAIL
 
@@ -327,24 +294,12 @@
   [th.colSpan: setAttribute() to object "3" followed by IDL get]
     expected: FAIL
 
-  [th.colSpan: IDL set to 2147483647 followed by getAttribute()]
-    expected: FAIL
-
   [th.colSpan: IDL set to 2147483647 followed by IDL get]
     expected: FAIL
 
-  [th.rowSpan: setAttribute() to -36 followed by getAttribute()]
-    expected: FAIL
-
-  [th.rowSpan: setAttribute() to -1 followed by getAttribute()]
-    expected: FAIL
-
   [th.rowSpan: setAttribute() to 2147483647 followed by IDL get]
     expected: FAIL
 
-  [th.rowSpan: setAttribute() to "-1" followed by getAttribute()]
-    expected: FAIL
-
   [th.rowSpan: setAttribute() to object "3" followed by getAttribute()]
     expected: FAIL
 
diff --git a/testing/web-platform/meta/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.octal.html.ini b/testing/web-platform/meta/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.octal.html.ini
deleted file mode 100644
index 5ce2b73adb93..000000000000
--- a/testing/web-platform/meta/html/semantics/embedded-content/the-canvas-element/size.attributes.parse.octal.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[size.attributes.parse.octal.html]
-  type: testharness
-  [Parsing of non-negative integers]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/html/semantics/embedded-content/the-canvas-element/size.attributes.setAttribute.octal.html.ini b/testing/web-platform/meta/html/semantics/embedded-content/the-canvas-element/size.attributes.setAttribute.octal.html.ini
deleted file mode 100644
index 12b5db414ac5..000000000000
--- a/testing/web-platform/meta/html/semantics/embedded-content/the-canvas-element/size.attributes.setAttribute.octal.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[size.attributes.setAttribute.octal.html]
-  type: testharness
-  [Parsing of non-negative integers in setAttribute]
-    expected: FAIL
-