diff --git a/storage/browser/file_system/obfuscated_file_util.cc b/storage/browser/file_system/obfuscated_file_util.cc
index 4919b1771fd26..092b4b0bc1ee3 100644
--- a/storage/browser/file_system/obfuscated_file_util.cc
+++ b/storage/browser/file_system/obfuscated_file_util.cc
@@ -793,7 +793,7 @@ base::File::Error ObfuscatedFileUtil::DeleteDirectory(
     return base::File::FILE_ERROR_NOT_FOUND;
   if (!file_id) {
     // Cannot remove the root directory.
-    return base::File::FILE_ERROR_FAILED;
+    return base::File::FILE_ERROR_ACCESS_DENIED;
   }
   FileInfo file_info;
   if (!db->GetFileInfo(file_id, &file_info)) {
diff --git a/third_party/blink/web_tests/external/wpt/file-system-access/sandboxed_FileSystemBaseHandle-remove.https.any.js b/third_party/blink/web_tests/external/wpt/file-system-access/sandboxed_FileSystemBaseHandle-remove.https.any.js
index 6044f65ae6b21..19c48df438f00 100644
--- a/third_party/blink/web_tests/external/wpt/file-system-access/sandboxed_FileSystemBaseHandle-remove.https.any.js
+++ b/third_party/blink/web_tests/external/wpt/file-system-access/sandboxed_FileSystemBaseHandle-remove.https.any.js
@@ -1,7 +1,3 @@
 // META: script=resources/test-helpers.js
 // META: script=../fs/resources/sandboxed-fs-test-helpers.js
 // META: script=script-tests/FileSystemBaseHandle-remove.js
-
-directory_test(async (t, root) => {
-    await promise_rejects_dom(t, 'InvalidStateError', root.remove());
-}, 'cannot remove the root of a sandbox file system');
diff --git a/third_party/blink/web_tests/external/wpt/file-system-access/script-tests/FileSystemBaseHandle-remove.js b/third_party/blink/web_tests/external/wpt/file-system-access/script-tests/FileSystemBaseHandle-remove.js
index 2306bde7cdb87..95196db62b3c8 100644
--- a/third_party/blink/web_tests/external/wpt/file-system-access/script-tests/FileSystemBaseHandle-remove.js
+++ b/third_party/blink/web_tests/external/wpt/file-system-access/script-tests/FileSystemBaseHandle-remove.js
@@ -91,3 +91,8 @@ directory_test(async (t, root) => {
   assert_array_equals(await getSortedDirectoryEntries(root), ['file-to-keep']);
   await promise_rejects_dom(t, 'NotFoundError', getFileContents(handle));
 }, 'remove() while the file has an open writable fails');
+
+promise_test(async (t) => {
+  const root = await navigator.storage.getDirectory();
+  await promise_rejects_dom(t, 'NoModificationAllowedError', root.remove());
+}, 'cannot remove the root of a sandbox file system');