diff --git a/css/parser/tests/fixture/bom/input.css b/css/parser/tests/fixture/bom/input.css
new file mode 100644
index 000000000000..3050dc54d847
--- /dev/null
+++ b/css/parser/tests/fixture/bom/input.css
@@ -0,0 +1,3 @@
+a {
+    color: red;
+}
\ No newline at end of file
diff --git a/css/parser/tests/fixture/bom/output.json b/css/parser/tests/fixture/bom/output.json
new file mode 100644
index 000000000000..de01089991a0
--- /dev/null
+++ b/css/parser/tests/fixture/bom/output.json
@@ -0,0 +1,108 @@
+{
+  "type": "Stylesheet",
+  "span": {
+    "start": 0,
+    "end": 21,
+    "ctxt": 0
+  },
+  "rules": [
+    {
+      "type": "StyleRule",
+      "span": {
+        "start": 0,
+        "end": 21,
+        "ctxt": 0
+      },
+      "selectors": {
+        "type": "SelectorList",
+        "span": {
+          "start": 0,
+          "end": 1,
+          "ctxt": 0
+        },
+        "children": [
+          {
+            "type": "ComplexSelector",
+            "span": {
+              "start": 0,
+              "end": 1,
+              "ctxt": 0
+            },
+            "children": [
+              {
+                "type": "CompoundSelector",
+                "span": {
+                  "start": 0,
+                  "end": 1,
+                  "ctxt": 0
+                },
+                "nestingSelector": null,
+                "typeSelector": {
+                  "type": "TypeSelector",
+                  "span": {
+                    "start": 0,
+                    "end": 1,
+                    "ctxt": 0
+                  },
+                  "prefix": null,
+                  "name": {
+                    "type": "Text",
+                    "span": {
+                      "start": 0,
+                      "end": 1,
+                      "ctxt": 0
+                    },
+                    "value": "a",
+                    "raw": "a"
+                  }
+                },
+                "subclassSelectors": []
+              }
+            ]
+          }
+        ]
+      },
+      "block": {
+        "type": "Block",
+        "span": {
+          "start": 2,
+          "end": 21,
+          "ctxt": 0
+        },
+        "items": [
+          {
+            "type": "Declaration",
+            "span": {
+              "start": 8,
+              "end": 18,
+              "ctxt": 0
+            },
+            "property": {
+              "type": "Text",
+              "span": {
+                "start": 8,
+                "end": 13,
+                "ctxt": 0
+              },
+              "value": "color",
+              "raw": "color"
+            },
+            "value": [
+              {
+                "type": "Text",
+                "span": {
+                  "start": 15,
+                  "end": 18,
+                  "ctxt": 0
+                },
+                "value": "red",
+                "raw": "red"
+              }
+            ],
+            "important": null
+          }
+        ]
+      }
+    }
+  ]
+}
diff --git a/css/parser/tests/fixture/bom/span.rust-debug b/css/parser/tests/fixture/bom/span.rust-debug
new file mode 100644
index 000000000000..71823b4c13d3
--- /dev/null
+++ b/css/parser/tests/fixture/bom/span.rust-debug
@@ -0,0 +1,87 @@
+error: Stylesheet
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | / a {
+2 | |     color: red;
+3 | | }
+  | |_^
+
+error: Rule
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | / a {
+2 | |     color: red;
+3 | | }
+  | |_^
+
+error: StyleRule
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | / a {
+2 | |     color: red;
+3 | | }
+  | |_^
+
+error: SelectorList
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | a {
+  | ^
+
+error: ComplexSelector
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | a {
+  | ^
+
+error: CompoundSelector
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | a {
+  | ^
+
+error: TypeSelector
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | a {
+  | ^
+
+error: Text
+ --> $DIR/tests/fixture/bom/input.css:1:1
+  |
+1 | a {
+  | ^
+
+error: Block
+ --> $DIR/tests/fixture/bom/input.css:1:3
+  |
+1 |   a {
+  |  ___^
+2 | |     color: red;
+3 | | }
+  | |_^
+
+error: Declaration
+ --> $DIR/tests/fixture/bom/input.css:2:5
+  |
+2 |     color: red;
+  |     ^^^^^^^^^^
+
+error: Text
+ --> $DIR/tests/fixture/bom/input.css:2:5
+  |
+2 |     color: red;
+  |     ^^^^^
+
+error: Value
+ --> $DIR/tests/fixture/bom/input.css:2:12
+  |
+2 |     color: red;
+  |            ^^^
+
+error: Text
+ --> $DIR/tests/fixture/bom/input.css:2:12
+  |
+2 |     color: red;
+  |            ^^^
+