--- a/layout/style/test/property_database.js
+++ b/layout/style/test/property_database.js
@@ -6032,16 +6032,52 @@ var gCSSProperties = {
       "calc(-2px)",
       "calc(50%)",
       "calc(3*25px)",
       "calc(25px*3)",
       "calc(3*25px + 50%)",
     ],
     invalid_values: []
   },
+  "offset-block-start": {
+    domProp: "offsetBlockStart",
+    inherited: false,
+    type: CSS_TYPE_SHORTHAND_AND_LONGHAND,
+    logical: true,
+    get_computed: logical_box_prop_get_computed,
+    alias_for: "inset-block-start",
+    subproperties: [ "inset-block-start" ],
+  },
+  "offset-block-end": {
+    domProp: "offsetBlockEnd",
+    inherited: false,
+    type: CSS_TYPE_SHORTHAND_AND_LONGHAND,
+    logical: true,
+    get_computed: logical_box_prop_get_computed,
+    alias_for: "inset-block-end",
+    subproperties: [ "inset-block-end" ],
+  },
+  "offset-inline-start": {
+    domProp: "offsetInlineStart",
+    inherited: false,
+    type: CSS_TYPE_SHORTHAND_AND_LONGHAND,
+    logical: true,
+    get_computed: logical_box_prop_get_computed,
+    alias_for: "inset-inline-start",
+    subproperties: [ "inset-inline-start" ],
+  },
+  "offset-block-end": {
+    domProp: "offsetInlineEnd",
+    inherited: false,
+    type: CSS_TYPE_SHORTHAND_AND_LONGHAND,
+    logical: true,
+    get_computed: logical_box_prop_get_computed,
+    alias_for: "inset-inline-end",
+    subproperties: [ "inset-inline-end" ],
+  },
   "padding-block-end": {
     domProp: "paddingBlockEnd",
     inherited: false,
     type: CSS_TYPE_LONGHAND,
     applies_to_first_letter: true,
     // No applies_to_placeholder because we have a !important rule in forms.css.
     logical: true,
     get_computed: logical_box_prop_get_computed,