diff --git a/layout/tools/reftest/manifest.sys.mjs b/layout/tools/reftest/manifest.sys.mjs
index 5eecde795aa7..09ccefd9f7fd 100644
--- a/layout/tools/reftest/manifest.sys.mjs
+++ b/layout/tools/reftest/manifest.sys.mjs
@@ -155,6 +155,7 @@ function ReadManifest(aURL, aFilter, aManifestID) {
 
     var origLength = items.length;
     items = defaults.concat(items);
+    var modifiers = [...items];
     while (
       items[0].match(
         /^(fails|needs-focus|random|skip|asserts|slow|require-or|silentfail|pref|test-pref|ref-pref|fuzzy|chaos-mode|wr-capture|wr-capture-ref|noautofuzz)/
@@ -492,6 +493,7 @@ function ReadManifest(aURL, aFilter, aManifestID) {
           chaosMode,
           wrCapture,
           noAutoFuzz,
+          modifiers,
         },
         aFilter,
         aManifestID
@@ -572,6 +574,7 @@ function ReadManifest(aURL, aFilter, aManifestID) {
           chaosMode,
           wrCapture,
           noAutoFuzz,
+          modifiers,
         },
         aFilter,
         aManifestID
diff --git a/layout/tools/reftest/reftest.sys.mjs b/layout/tools/reftest/reftest.sys.mjs
index 0f103c5816a5..12bdab98f9f2 100644
--- a/layout/tools/reftest/reftest.sys.mjs
+++ b/layout/tools/reftest/reftest.sys.mjs
@@ -1512,6 +1512,8 @@ function RecordResult(testRunTime, errorMsg, typeSpecificResults) {
             extra.image1 = image1;
           }
         }
+        extra.modifiers = g.urls[0].modifiers;
+
         logger.testStatus(
           g.urls[0].identifier,
           message,
diff --git a/testing/mozbase/mozlog/mozlog/formatters/errorsummary.py b/testing/mozbase/mozlog/mozlog/formatters/errorsummary.py
index fcedb7ebd4ba..f03611d7dae0 100644
--- a/testing/mozbase/mozlog/mozlog/formatters/errorsummary.py
+++ b/testing/mozbase/mozlog/mozlog/formatters/errorsummary.py
@@ -46,6 +46,7 @@ class ErrorSummaryFormatter(BaseFormatter):
             "expected": item["expected"],
             "message": item.get("message"),
             "stack": item.get("stack"),
+            "modifiers": item.get("extra", {}).get("modifiers", ""),
             "known_intermittent": item.get("known_intermittent", []),
         }
         return self._output("test_result", data)
diff --git a/testing/mozbase/mozlog/tests/test_errorsummary.py b/testing/mozbase/mozlog/tests/test_errorsummary.py
index 30a5a304b21c..0925c3a09e71 100644
--- a/testing/mozbase/mozlog/tests/test_errorsummary.py
+++ b/testing/mozbase/mozlog/tests/test_errorsummary.py
@@ -33,7 +33,7 @@ import pytest
             ],
             """
                 {"groups": ["manifestA", "manifestB"], "action": "test_groups", "line": 0}
-                {"test": "test_baz", "subtest": null, "group": "manifestA", "status": "PASS", "expected": "FAIL", "message": null, "stack": null, "known_intermittent": [], "action": "test_result", "line": 8}
+                {"test": "test_baz", "subtest": null, "group": "manifestA", "status": "PASS", "expected": "FAIL", "message": null, "stack": null, "modifiers": "", "known_intermittent": [], "action": "test_result", "line": 8}
                 {"group": "manifestA", "status": "ERROR", "duration": 20, "action": "group_result", "line": 9}
                 {"group": "manifestB", "status": "OK", "duration": 10, "action": "group_result", "line": 9}
             """.strip(),
@@ -86,7 +86,7 @@ import pytest
             ],
             """
                 {"groups": ["manifestA", "manifestB"], "action": "test_groups", "line": 0}
-                {"test": "test_bar", "subtest": null, "group": "manifestA", "status": "CRASH", "expected": "OK", "message": null, "stack": null, "known_intermittent": [], "action": "test_result", "line": 4}
+                {"test": "test_bar", "subtest": null, "group": "manifestA", "status": "CRASH", "expected": "OK", "message": null, "stack": null, "modifiers": "", "known_intermittent": [], "action": "test_result", "line": 4}
                 {"group": "manifestA", "status": "ERROR", "duration": 20, "action": "group_result", "line": 9}
                 {"group": "manifestB", "status": "OK", "duration": 10, "action": "group_result", "line": 9}
             """.strip(),
@@ -143,8 +143,8 @@ import pytest
             ],
             """
                 {"groups": ["manifestA", "manifestB"], "action": "test_groups", "line": 0}
-                {"test": "test_baz", "subtest": "Test timed out", "group": "manifestA", "status": "FAIL", "expected": "PASS", "message": null, "stack": null, "known_intermittent": [], "action": "test_result", "line": 8}
-                {"test": "test_baz", "subtest": "", "group": "manifestA", "status": "TIMEOUT", "expected": "PASS", "message": null, "stack": null, "known_intermittent": [], "action": "test_result", "line": 9}
+                {"test": "test_baz", "subtest": "Test timed out", "group": "manifestA", "status": "FAIL", "expected": "PASS", "message": null, "stack": null, "modifiers": "", "known_intermittent": [], "action": "test_result", "line": 8}
+                {"test": "test_baz", "subtest": "", "group": "manifestA", "status": "TIMEOUT", "expected": "PASS", "message": null, "stack": null, "modifiers": "", "known_intermittent": [], "action": "test_result", "line": 9}
                 {"test": "manifestA", "group": "manifestA", "signature": "signature", "stackwalk_stderr": null, "stackwalk_stdout": null, "action": "crash", "line": 10}
                 {"group": "manifestA", "status": "ERROR", "duration": 49, "action": "group_result", "line": 12}
                 {"group": "manifestB", "status": "OK", "duration": 10, "action": "group_result", "line": 12}
@@ -225,7 +225,7 @@ import pytest
             ],
             """
                 {"groups": ["manifestA", "manifestB"], "action": "test_groups", "line": 0}
-                {"test": "test_baz", "group": "manifestA", "status": "FAIL", "expected": "OK", "subtest": null, "message": null, "stack": null, "known_intermittent": [], "action": "test_result", "line": 8}
+                {"test": "test_baz", "group": "manifestA", "status": "FAIL", "expected": "OK", "subtest": null, "message": null, "stack": null, "modifiers": "", "known_intermittent": [], "action": "test_result", "line": 8}
             """.strip(),
             id="timeout_no_group_status",
         ),