--- a/layout/style/test/test_transitions_per_property.html
+++ b/layout/style/test/test_transitions_per_property.html
@@ -67,26 +67,20 @@ var skippedProperties = {
     "background-position-x": true,  // Bug 1387946
     "background-position-y": true,  // Bug 1387946
     "background-size": true,        // Bug 1387946
     "mask-position": true,          // Bug 1387946
     "mask-position-x": true,        // Bug 1387946
     "mask-position-y": true,        // Bug 1387946
     "mask-size": true,              // Bug 1387946
     "box-shadow": true,             // Bug 1387973
-    "caret-color": true,            // Bug 1387951
-    "clip": true,                   // Bug 1387951
-    "column-count": true,           // Bug 1387939
-    "-moz-image-region": true,      // Bug 1387951
-    "order": true,                  // Bug 1387939
     "stroke-dasharray": true,       // Bug 1387986
     "stroke-dashoffset": true,      // Bug 1369614
     "stroke-width": true,           // Bug 1369614
     "text-shadow": true,            // Bug 1387973
-    "z-index": true,                // Bug 1387939
 };
 
 var supported_properties = {
     "border-bottom-left-radius": [ test_radius_transition ],
     "border-bottom-right-radius": [ test_radius_transition ],
     "border-top-left-radius": [ test_radius_transition ],
     "border-top-right-radius": [ test_radius_transition ],
     "-moz-box-flex": [ test_float_zeroToOne_transition,