diff --git a/taskcluster/ci/test/test-sets.yml b/taskcluster/ci/test/test-sets.yml
index 515ee0ce21b4..f25a4a92b7d5 100644
--- a/taskcluster/ci/test/test-sets.yml
+++ b/taskcluster/ci/test/test-sets.yml
@@ -320,7 +320,7 @@ macosx1014-64-tests:
     - mochitest
     - mochitest-a11y
     # - mochitest-browser-chrome
-    # - mochitest-chrome
+    - mochitest-chrome
     - mochitest-devtools-chrome
     - mochitest-devtools-webreplay
     - mochitest-gpu
@@ -347,7 +347,6 @@ macosx1014-64-qr-tests:
 macosx64-tests:
     - gtest
     - mochitest-browser-chrome
-    - mochitest-chrome
     - mochitest-media
     # - mochitest-webgl2-ext test timeouts
 
diff --git a/toolkit/content/tests/chrome/chrome.ini b/toolkit/content/tests/chrome/chrome.ini
index 4835f6f9cec1..a8b1f274934a 100644
--- a/toolkit/content/tests/chrome/chrome.ini
+++ b/toolkit/content/tests/chrome/chrome.ini
@@ -112,6 +112,7 @@ skip-if = toolkit == "cocoa"
 [test_editor_for_textbox_with_autocomplete.xul]
 [test_findbar.xul]
 tags = clipboard
+skip-if = os == 'mac' && os_version == '10.14' # macosx1014 due to 1550078
 [test_findbar_entireword.xul]
 [test_findbar_events.xul]
 [test_focus_anons.xul]
@@ -141,6 +142,7 @@ support-files = window_navigate_persist.html
 [test_notificationbox.xul]
 skip-if = (os == 'linux' && debug) || (os == 'win') # Bug 1429649
 [test_panel.xul]
+skip-if = os == 'mac' && os_version == '10.14' # macosx1014 due to 1550078
 [test_panel_anchoradjust.xul]
 [test_panelfrommenu.xul]
 [test_popup_anchor.xul]
@@ -183,7 +185,7 @@ support-files = window_preferences_onsyncfrompreference.xul
 [test_textbox_emptytext.xul]
 [test_textbox_search.xul]
 [test_titlebar.xul]
-skip-if = os == "linux"
+skip-if = os == "linux" || (os == 'mac' && os_version == '10.14') # macosx1014 due to 1550078
 [test_tooltip.xul]
 skip-if = (os == 'mac' && os_version == '10.10') || (os == 'win') # Bug 1141245, frequent timeouts on OSX 10.10, Windows
 [test_tooltip_noautohide.xul]