diff --git a/src/documents/tests/test_tasks.py b/src/documents/tests/test_tasks.py
index 0f9f8511f..348eb0db5 100644
--- a/src/documents/tests/test_tasks.py
+++ b/src/documents/tests/test_tasks.py
@@ -118,6 +118,19 @@ class TestSanityCheck(DirectoriesMixin, TestCase):
         self.assertRaises(SanityCheckFailedException, tasks.sanity_check)
         m.assert_called_once()
 
+    @mock.patch("documents.tasks.sanity_checker.check_sanity")
+    def test_sanity_check_error_no_raise(self, m):
+        messages = SanityCheckMessages()
+        messages.error(None, "Some error")
+        m.return_value = messages
+        # No exception should be raised
+        result = tasks.sanity_check(raise_on_error=False)
+        self.assertEqual(
+            result,
+            "Sanity check exited with errors. See log.",
+        )
+        m.assert_called_once()
+
     @mock.patch("documents.tasks.sanity_checker.check_sanity")
     def test_sanity_check_warning(self, m):
         messages = SanityCheckMessages()