--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -218739,21 +218739,21 @@
    "eee8ff07b3ec5e83e5f18305f5bc00eb72468443",
    "testharness"
   ],
   "web-animations/animation-model/animation-types/interpolation-per-property.html": [
    "55100f7d505bc8cbc966ced0d1337ed78534a553",
    "testharness"
   ],
   "web-animations/animation-model/animation-types/property-list.js": [
-   "7845e786fa31d2a707a018ca99e3f3bb53fb3083",
+   "83a52204cc36f6b757129dae947f03f6a8748bde",
    "support"
   ],
   "web-animations/animation-model/animation-types/property-types.js": [
-   "634bf959bd37624d1846a4b87595eee8b90f9146",
+   "e7743fb5d4b2b55e7d735b45871e28d537dc1102",
    "support"
   ],
   "web-animations/animation-model/animation-types/spacing-keyframes-filters.html": [
    "bd771a8a18245560221d92ea3495f81918c09848",
    "testharness"
   ],
   "web-animations/animation-model/animation-types/spacing-keyframes-shapes.html": [
    "03c3ab6815cfa96c07d5f95b6059fb276c50a25f",

--- a/testing/web-platform/tests/web-animations/animation-model/animation-types/property-list.js
+++ b/testing/web-platform/tests/web-animations/animation-model/animation-types/property-list.js
@@ -374,17 +374,17 @@ var gCSSProperties = {
     // https://drafts.csswg.org/css-multicol/#propdef-column-count
     types: [ 'positiveInteger',
             { type: 'discrete', options: [ [ 'auto', '10' ] ] }
     ]
   },
   'column-gap': {
     // https://drafts.csswg.org/css-multicol/#propdef-column-gap
     types: [ 'length',
-	     {  type: 'discrete', options: [ [ 'normal', '200px' ] ] }
+            {  type: 'discrete', options: [ [ 'normal', '200px' ] ] }
     ]
   },
   'column-rule-color': {
     // https://drafts.csswg.org/css-multicol/#propdef-column-rule-color
     types: [ 'color' ]
   },
   'column-fill': {
     // https://drafts.csswg.org/css-multicol/#propdef-column-fill

--- a/testing/web-platform/tests/web-animations/animation-model/animation-types/property-types.js
+++ b/testing/web-platform/tests/web-animations/animation-model/animation-types/property-types.js
@@ -1224,32 +1224,32 @@ const positionType = {
 
 const rectType = {
   testInterpolation: function(property, setup) {
     test(function(t) {
       var idlName = propertyToIDL(property);
       var target = createTestElement(t, setup);
       var animation = target.animate({ [idlName]:
                                          ['rect(10px, 10px, 10px, 10px)',
-					  'rect(50px, 50px, 50px, 50px)'] },
+                                          'rect(50px, 50px, 50px, 50px)'] },
                                      { duration: 1000, fill: 'both' });
-	testAnimationSamples(
+      testAnimationSamples(
           animation, idlName,
           [{ time: 500,  expected: 'rect(30px, 30px, 30px, 30px)' }]);
     }, property + ' supports animating as a rect');
   },
 
   testAddition: function(property, setup) {
     test(function(t) {
       var idlName = propertyToIDL(property);
       var target = createTestElement(t, setup);
       target.style[idlName] = 'rect(100px, 100px, 100px, 100px)';
       var animation = target.animate({ [idlName]:
                                          ['rect(10px, 10px, 10px, 10px)',
-					  'rect(10px, 10px, 10px, 10px)'] },
+                                          'rect(10px, 10px, 10px, 10px)'] },
                                      { duration: 1000, composite: 'add' });
       testAnimationSamples(
         animation, idlName,
         [{ time: 0, expected: 'rect(110px, 110px, 110px, 110px)' }]);
     }, property + ': rect');
   },
 }