diff --git a/test/wpt/status/hr-time.cjs b/test/wpt/status/hr-time.cjs
new file mode 100644
index 00000000000000..c426eeeb8e9274
--- /dev/null
+++ b/test/wpt/status/hr-time.cjs
@@ -0,0 +1,37 @@
+'use strict';
+
+const os = require('node:os');
+
+const isMacOS15X64 =
+  os.platform() === 'darwin' &&
+  process.arch === 'x64' &&
+  os.release().startsWith('24.');
+
+module.exports = {
+  ...(isMacOS15X64 ? {
+    'basic.any.js': {
+      fail: {
+        note: 'Flaky on macos15-x64: Date.now() can shift relative to monotonic performance.now()',
+        flaky: [
+          'High resolution time has approximately the right relative magnitude',
+        ],
+      },
+    },
+  } : {}),
+
+  'idlharness.any.js': {
+    fail: {
+      expected: [
+        'Window interface: attribute performance',
+      ],
+    },
+  },
+
+  'idlharness-shadowrealm.window.js': {
+    skip: 'ShadowRealm support is not enabled',
+  },
+
+  'window-worker-timeOrigin.window.js': {
+    skip: 'depends on URL.createObjectURL(blob)',
+  },
+};
diff --git a/test/wpt/status/hr-time.json b/test/wpt/status/hr-time.json
deleted file mode 100644
index b787bcb7862cb6..00000000000000
--- a/test/wpt/status/hr-time.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "idlharness.any.js": {
-    "fail": {
-      "expected": [
-        "Window interface: attribute performance"
-      ]
-    }
-  },
-  "idlharness-shadowrealm.window.js": {
-    "skip": "ShadowRealm support is not enabled"
-  },
-  "window-worker-timeOrigin.window.js": {
-    "skip": "depends on URL.createObjectURL(blob)"
-  }
-}