--- a/testing/web-platform/meta/web-animations/interfaces/KeyframeEffect/processing-a-keyframes-argument.html.ini
+++ b/testing/web-platform/meta/web-animations/interfaces/KeyframeEffect/processing-a-keyframes-argument.html.ini
@@ -1,12 +1,4 @@
 [processing-a-keyframes-argument.html]
   type: testharness
   [Equivalent property indexed and sequenced keyframes: same offset applied to all keyframes]
     expected: FAIL
-
-  [Custom iterator with value list in keyframe should give bizarre string representation of list.]
-    expected:
-      if not debug and stylo and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-      if not debug and stylo and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-      if debug and stylo and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-      if debug and stylo and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-

deleted file mode 100644
--- a/testing/web-platform/meta/web-animations/interfaces/KeyframeEffect/setTarget.html.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-[setTarget.html]
-  type: testharness
-  [Test paced spacing mode after setting a new target]
-    expected:
-      if not debug and stylo and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-      if not debug and stylo and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-      if debug and stylo and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-      if debug and stylo and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): FAIL
-