diff --git a/src/python_testing/TC_WHM_2_1.py b/src/python_testing/TC_WHM_2_1.py
index 03b93419f80f5e..d6fabc47cc0205 100644
--- a/src/python_testing/TC_WHM_2_1.py
+++ b/src/python_testing/TC_WHM_2_1.py
@@ -162,7 +162,8 @@ class CommonCodes(Enum):
             st = ret.status
             is_mfg_code = st in range(0x80, 0xC0)
             is_err_code = (st == CommonCodes.GENERIC_FAILURE.value) or (st == CommonCodes.INVALID_IN_MODE.value) or is_mfg_code
-            asserts.assert_true(is_err_code, "Changing to mode %d must fail due to the current state of the device" % (self.mode_fail))
+            asserts.assert_true(
+                is_err_code, "Changing to mode %d must fail due to the current state of the device" % (self.mode_fail))
             st_text_len = len(ret.statusText)
             asserts.assert_true(st_text_len in range(1, 65), "StatusText length (%d) must be between 1 and 64" % (st_text_len))