diff --git a/presubmit_canned_checks.py b/presubmit_canned_checks.py
index 16c6fa308..204c503b6 100644
--- a/presubmit_canned_checks.py
+++ b/presubmit_canned_checks.py
@@ -2304,16 +2304,19 @@ def CheckNewDEPSHooksHasRequiredReviewers(input_api, output_api):
 
     if not required_reviewers:
         return []
-    # TODO - crbug/396736534: return error if CL is not approved by the
-    # required reviewers during submission.
+    submitting = input_api.is_committing and not input_api.dry_run
     reviewers = input_api.gerrit.GetChangeReviewers(input_api.change.issue,
-                                                    approving_only=False)
-
+                                                    approving_only=submitting)
     if set(r for r in reviewers if r in required_reviewers):
-        return []  # At least one required reviewer is present.
-    msg = (f'New DEPS {"hook" if len(new_hooks-old_hooks) == 1 else "hooks"} '
-           f'({", ".join(sorted(new_hooks-old_hooks))}) are found. Please add '
-           'one of the following reviewers:')
+        return []  # passing the check
+    added_hooks = new_hooks - old_hooks
+    msg = (f'New DEPS {"hook" if len(added_hooks) == 1 else "hooks"} '
+           f'({", ".join(sorted(new_hooks-old_hooks))}) '
+           f'{"is" if len(added_hooks) == 1 else "are"} found. ')
+    if submitting:
+        msg += 'The CL must be approved by one of the following reviewers:'
+    else:
+        msg += 'Please request review from one of the following reviewers:'
     for r in required_reviewers:
         msg += f'\n * {r}'
     return [output_api.PresubmitError(msg)]
diff --git a/tests/presubmit_canned_checks_test.py b/tests/presubmit_canned_checks_test.py
index 985e06d12..a9be5a32a 100755
--- a/tests/presubmit_canned_checks_test.py
+++ b/tests/presubmit_canned_checks_test.py
@@ -567,16 +567,31 @@ class CheckNewDEPSHooksHasRequiredReviewersTest(unittest.TestCase):
             },
             {
                 'name':
-                'add new hook but reviewer missing',
+                'add new hook and require review',
                 'old_contents': ['hooks = [{"name": "old_hook"}]'],
                 'new_contents': [
                     'hooks = [{"name": "old_hook"}, {"name": "new_hook"},  {"name": "new_hook_2"}]'
                 ],
                 'reviewers': [],
                 'expected_error_msg':
-                'New DEPS hooks (new_hook, new_hook_2) are found. Please add '
-                'one of the following reviewers:\n * foo@chromium.org\n '
-                '* bar@chromium.org\n * baz@chromium.org'
+                'New DEPS hooks (new_hook, new_hook_2) are found. Please '
+                'request review from one of the following reviewers:\n '
+                '* foo@chromium.org\n * bar@chromium.org\n * baz@chromium.org'
+            },
+            {
+                'name':
+                'add new hook and require approval',
+                'old_contents': ['hooks = [{"name": "old_hook"}]'],
+                'new_contents': [
+                    'hooks = [{"name": "old_hook"}, {"name": "new_hook"},  {"name": "new_hook_2"}]'
+                ],
+                'submitting':
+                True,
+                'reviewers': ['not_relevant@chromium.org'],
+                'expected_error_msg':
+                'New DEPS hooks (new_hook, new_hook_2) are found. The CL must '
+                'be approved by one of the following reviewers:\n'
+                ' * foo@chromium.org\n * bar@chromium.org\n * baz@chromium.org'
             },
             {
                 'name':
@@ -587,6 +602,17 @@ class CheckNewDEPSHooksHasRequiredReviewersTest(unittest.TestCase):
                 ],
                 'reviewers': ['baz@chromium.org'],
             },
+            {
+                'name':
+                'add new hook and reviewer already approves',
+                'old_contents': ['hooks = [{"name": "old_hook"}]'],
+                'new_contents': [
+                    'hooks = [{"name": "old_hook"}, {"name": "new_hook"},  {"name": "new_hook_2"}]'
+                ],
+                'submitting':
+                True,
+                'reviewers': ['foo@chromium.org'],
+            },
             {
                 'name':
                 'change existing hook',
@@ -618,6 +644,9 @@ class CheckNewDEPSHooksHasRequiredReviewersTest(unittest.TestCase):
                                      old_contents=case['old_contents'],
                                      new_contents=case['new_contents']),
                 ]
+                if case.get('submitting', False):
+                    self.input_api.is_committing = True
+                    self.input_api.dry_run = False
                 gerrit_mock.GetChangeReviewers.return_value = case['reviewers']
                 results = presubmit_canned_checks.CheckNewDEPSHooksHasRequiredReviewers(
                     self.input_api,