diff --git a/ate/utils.py b/ate/utils.py
index 50a93ad6..a9685349 100644
--- a/ate/utils.py
+++ b/ate/utils.py
@@ -210,6 +210,8 @@ def match_expected(value, expected, comparator="eq"):
             assert value in expected
         elif comparator in ["regex"]:
             assert re.match(expected, value)
+        elif comparator in ["str_len", "string_length"]:
+            assert len(value) == int(expected)
         else:
             raise ParamsError("comparator not supported!")
 
diff --git a/test/test_utils.py b/test/test_utils.py
index 86aacec3..a607ce46 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -201,3 +201,6 @@ class TestUtils(ApiServerUnittest):
 
         with self.assertRaises(exception.ParamsError):
             utils.match_expected(1, 2, "not_supported_comparator")
+
+        self.assertTrue(utils.match_expected("2017-06-29 17:29:58", 19, "str_len"))
+        self.assertTrue(utils.match_expected("2017-06-29 17:29:58", "19", "str_len"))