diff --git a/sonic_platform_base/sonic_xcvr/api/public/cmis.py b/sonic_platform_base/sonic_xcvr/api/public/cmis.py
index f716db1f1..a96e76aef 100644
--- a/sonic_platform_base/sonic_xcvr/api/public/cmis.py
+++ b/sonic_platform_base/sonic_xcvr/api/public/cmis.py
@@ -3152,6 +3152,6 @@ def get_error_description(self):
         if state != CmisCodes.MODULE_STATE[3]:
             return state
 
-        return None
+        return 'OK'
 
     # TODO: other XcvrApi methods
diff --git a/tests/sonic_xcvr/test_cmis.py b/tests/sonic_xcvr/test_cmis.py
index 5e94b3d9e..5738fc71b 100644
--- a/tests/sonic_xcvr/test_cmis.py
+++ b/tests/sonic_xcvr/test_cmis.py
@@ -3066,7 +3066,7 @@ def test_get_error_description(self):
         self.api.xcvr_eeprom.read.return_value = 0x10
 
         result = self.api.get_error_description()
-        assert result is None
+        assert result is 'OK'
 
     def test_random_read_fail(self):
         def mock_read_raw(offset, size):