--- a/testing/web-platform/meta/web-animations/animation-model/animation-types/interpolation-per-property.html.ini
+++ b/testing/web-platform/meta/web-animations/animation-model/animation-types/interpolation-per-property.html.ini
@@ -1,25 +1,9 @@
 prefs: [layout.css.contain.enabled:true, layout.css.initial-letter.enabled:true, layout.css.overflow-clip-box.enabled:true, layout.css.shape-outside.enabled:true]
 [interpolation-per-property.html]
   type: testharness
-  [flex-basis supports animating as combination units "px" and "%"]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291187
-
-  [flex-basis supports animating as combination units "%" and "em"]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291187
-
   [filterList has testInterpolation function]
     expected: FAIL
 
   [filter (type: filterList) has testInterpolation function]
     expected: FAIL
 
-  [word-spacing supports animating as combination units "px" and "%"]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291187
-
-  [word-spacing supports animating as combination units "%" and "em"]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1291187
-