diff --git a/tools/crypto/ccp/test_dbc.py b/tools/crypto/ccp/test_dbc.py
index a28a1f94c1d2..79de3638a01a 100755
--- a/tools/crypto/ccp/test_dbc.py
+++ b/tools/crypto/ccp/test_dbc.py
@@ -33,8 +33,8 @@ def system_is_secured() -> bool:
 class DynamicBoostControlTest(unittest.TestCase):
     def __init__(self, data) -> None:
         self.d = None
-        self.signature = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
-        self.uid = "1111111111111111"
+        self.signature = b"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        self.uid = b"1111111111111111"
         super().__init__(data)
 
     def setUp(self) -> None:
@@ -192,12 +192,12 @@ class TestUnFusedSystem(DynamicBoostControlTest):
         # SOC power
         soc_power_max = process_param(self.d, PARAM_GET_SOC_PWR_MAX, self.signature)
         soc_power_min = process_param(self.d, PARAM_GET_SOC_PWR_MIN, self.signature)
-        self.assertGreater(soc_power_max.parameter, soc_power_min.parameter)
+        self.assertGreater(soc_power_max[0], soc_power_min[0])
 
         # fmax
         fmax_max = process_param(self.d, PARAM_GET_FMAX_MAX, self.signature)
         fmax_min = process_param(self.d, PARAM_GET_FMAX_MIN, self.signature)
-        self.assertGreater(fmax_max.parameter, fmax_min.parameter)
+        self.assertGreater(fmax_max[0], fmax_min[0])
 
         # cap values
         keys = {
@@ -208,7 +208,7 @@ class TestUnFusedSystem(DynamicBoostControlTest):
         }
         for k in keys:
             result = process_param(self.d, keys[k], self.signature)
-            self.assertGreater(result.parameter, 0)
+            self.assertGreater(result[0], 0)
 
     def test_get_invalid_param(self) -> None:
         """fetch an invalid parameter"""
@@ -226,17 +226,17 @@ class TestUnFusedSystem(DynamicBoostControlTest):
         original = process_param(self.d, PARAM_GET_FMAX_CAP, self.signature)
 
         # set the fmax
-        target = original.parameter - 100
+        target = original[0] - 100
         process_param(self.d, PARAM_SET_FMAX_CAP, self.signature, target)
         time.sleep(SET_DELAY)
         new = process_param(self.d, PARAM_GET_FMAX_CAP, self.signature)
-        self.assertEqual(new.parameter, target)
+        self.assertEqual(new[0], target)
 
         # revert back to current
-        process_param(self.d, PARAM_SET_FMAX_CAP, self.signature, original.parameter)
+        process_param(self.d, PARAM_SET_FMAX_CAP, self.signature, original[0])
         time.sleep(SET_DELAY)
         cur = process_param(self.d, PARAM_GET_FMAX_CAP, self.signature)
-        self.assertEqual(cur.parameter, original.parameter)
+        self.assertEqual(cur[0], original[0])
 
     def test_set_power_cap(self) -> None:
         """get/set power cap limit"""
@@ -244,17 +244,17 @@ class TestUnFusedSystem(DynamicBoostControlTest):
         original = process_param(self.d, PARAM_GET_PWR_CAP, self.signature)
 
         # set the fmax
-        target = original.parameter - 10
+        target = original[0] - 10
         process_param(self.d, PARAM_SET_PWR_CAP, self.signature, target)
         time.sleep(SET_DELAY)
         new = process_param(self.d, PARAM_GET_PWR_CAP, self.signature)
-        self.assertEqual(new.parameter, target)
+        self.assertEqual(new[0], target)
 
         # revert back to current
-        process_param(self.d, PARAM_SET_PWR_CAP, self.signature, original.parameter)
+        process_param(self.d, PARAM_SET_PWR_CAP, self.signature, original[0])
         time.sleep(SET_DELAY)
         cur = process_param(self.d, PARAM_GET_PWR_CAP, self.signature)
-        self.assertEqual(cur.parameter, original.parameter)
+        self.assertEqual(cur[0], original[0])
 
     def test_set_3d_graphics_mode(self) -> None:
         """set/get 3d graphics mode"""