diff --git a/test-infra/sauce_browsers.yml b/test-infra/sauce_browsers.yml
index a2edd8b7b3..ea54045975 100644
--- a/test-infra/sauce_browsers.yml
+++ b/test-infra/sauce_browsers.yml
@@ -3,29 +3,26 @@
 
   {
     browserName: "safari",
-    platform: "OS X 10.8"
+    platform: "OS X 10.9"
   },
-  # { # Safari 7 (which requires Mavericks) is not currently supported by Sauce Labs
-  #   browserName: "safari",
+  # FIXME: keeps timing out frequently for unknown reasons
+  # {
+  #   browserName: "chrome",
   #   platform: "OS X 10.9"
   # },
+
   {
-    browserName: "chrome",
+    browserName: "firefox",
     platform: "OS X 10.9"
   },
 
-  # { # FIXME: currently fails 1 tooltip test
-  #   browserName: "firefox",
-  #   platform: "OS X 10.9"
-  # },
-
   # Mac Opera not currently supported by Sauce Labs
 
-  # { # FIXME: currently fails 1 tooltip test
-  #   browserName: "internet explorer",
-  #   version: "11",
-  #   platform: "Windows 8.1"
-  # },
+  {
+    browserName: "internet explorer",
+    version: "11",
+    platform: "Windows 8.1"
+  },
 
   # {
   #   browserName: "internet explorer",