--- a/testing/web-platform/meta/encrypted-media/clearkey-mp4-playback-temporary-encrypted-clear.html.ini
+++ b/testing/web-platform/meta/encrypted-media/clearkey-mp4-playback-temporary-encrypted-clear.html.ini
@@ -1,15 +1,15 @@
 [clearkey-mp4-playback-temporary-encrypted-clear.html]
   type: testharness
   expected:
-    if not debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): ERROR
-    if not debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): ERROR
-    if debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): ERROR
-    if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): ERROR
+    if not debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): TIMEOUT
+    if not debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): TIMEOUT
+    if debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): TIMEOUT
+    if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): TIMEOUT
   [org.w3.clearkey, temporary, mp4, playback, single key, encrypted then clear content]
     expected:
       if not debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if not debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if not debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): TIMEOUT
       if not debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): TIMEOUT

--- a/testing/web-platform/meta/encrypted-media/clearkey-mp4-playback-temporary-multisession.html.ini
+++ b/testing/web-platform/meta/encrypted-media/clearkey-mp4-playback-temporary-multisession.html.ini
@@ -1,18 +1,8 @@
 [clearkey-mp4-playback-temporary-multisession.html]
   type: testharness
-  expected:
-    if not debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): ERROR
-    if not debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): ERROR
-    if debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): ERROR
-    if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): ERROR
   [org.w3.clearkey, temporary, mp4, playback with multiple sessions, multikey video]
     expected:
       if not debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
       if not debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
-      if not debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): TIMEOUT
-      if not debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86") and (bits == 32): TIMEOUT
-      if debug and not e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): TIMEOUT
-      if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): TIMEOUT
-

--- a/testing/web-platform/meta/media-source/mediasource-errors.html.ini
+++ b/testing/web-platform/meta/media-source/mediasource-errors.html.ini
@@ -1,14 +1,8 @@
 [mediasource-errors.html]
   type: testharness
   expected:
     if debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): CRASH
     if debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): TIMEOUT
-  [Signaling 'decode' error via endOfStream() after initialization segment has been appended and the HTMLMediaElement has reached HAVE_METADATA.]
-    expected: FAIL
-
-  [Signaling 'network' error via endOfStream() after initialization segment has been appended and the HTMLMediaElement has reached HAVE_METADATA.]
-    expected: FAIL
-
   [Signaling 'decode' error via segment parser loop algorithm after initialization segment and partial media segment has been appended.]
     expected: FAIL