diff --git a/selfdrive/car/chrysler/carstate.py b/selfdrive/car/chrysler/carstate.py
index 27b5745d8448b7..30a0bf6a3a3f09 100644
--- a/selfdrive/car/chrysler/carstate.py
+++ b/selfdrive/car/chrysler/carstate.py
@@ -126,7 +126,7 @@ def get_can_parser(CP):
         ("BLIND_SPOT_RIGHT", "BLIND_SPOT_WARNINGS"),
         ("BLIND_SPOT_LEFT", "BLIND_SPOT_WARNINGS"),
       ]
-      checks += [("BLIND_SPOT_WARNINGS", 2)]
+      checks.append(("BLIND_SPOT_WARNINGS", 2))
 
     return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 0)
 
diff --git a/selfdrive/car/gm/carstate.py b/selfdrive/car/gm/carstate.py
index 945f21a1551d43..97425609235ce0 100644
--- a/selfdrive/car/gm/carstate.py
+++ b/selfdrive/car/gm/carstate.py
@@ -124,12 +124,8 @@ def get_can_parser(CP):
     ]
 
     if CP.carFingerprint == CAR.VOLT:
-      signals += [
-        ("RegenPaddle", "EBCMRegenPaddle"),
-      ]
-      checks += [
-        ("EBCMRegenPaddle", 50),
-      ]
+      signals.append(("RegenPaddle", "EBCMRegenPaddle"))
+      checks.append(("EBCMRegenPaddle", 50))
 
     return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, CanBus.POWERTRAIN)
 
diff --git a/selfdrive/car/honda/carstate.py b/selfdrive/car/honda/carstate.py
index e6bb9c14844c69..75f8d23204105b 100644
--- a/selfdrive/car/honda/carstate.py
+++ b/selfdrive/car/honda/carstate.py
@@ -65,17 +65,13 @@ def get_can_signals(CP, gearbox_msg, main_on_sig_msg):
     ]
 
   if CP.carFingerprint in (CAR.CRV_HYBRID, CAR.CIVIC_BOSCH_DIESEL, CAR.ACURA_RDX_3G, CAR.HONDA_E):
-    checks += [
-      (gearbox_msg, 50),
-    ]
+    checks.append((gearbox_msg, 50))
   else:
-    checks += [
-      (gearbox_msg, 100),
-    ]
+    checks.append((gearbox_msg, 100))
 
   if CP.carFingerprint in HONDA_BOSCH_ALT_BRAKE_SIGNAL:
-    signals += [("BRAKE_PRESSED", "BRAKE_MODULE", 0)]
-    checks += [("BRAKE_MODULE", 50)]
+    signals.append(("BRAKE_PRESSED", "BRAKE_MODULE", 0))
+    checks.append(("BRAKE_MODULE", 50))
 
   if CP.carFingerprint in HONDA_BOSCH:
     signals += [
@@ -103,14 +99,14 @@ def get_can_signals(CP, gearbox_msg, main_on_sig_msg):
                 ("CRUISE_SPEED_OFFSET", "CRUISE_PARAMS", 0)]
 
     if CP.carFingerprint == CAR.ODYSSEY_CHN:
-      checks += [("CRUISE_PARAMS", 10)]
+      checks.append(("CRUISE_PARAMS", 10))
     else:
-      checks += [("CRUISE_PARAMS", 50)]
+      checks.append(("CRUISE_PARAMS", 50))
 
   if CP.carFingerprint in (CAR.ACCORD, CAR.ACCORDH, CAR.CIVIC_BOSCH, CAR.CIVIC_BOSCH_DIESEL, CAR.CRV_HYBRID, CAR.INSIGHT, CAR.ACURA_RDX_3G, CAR.HONDA_E):
-    signals += [("DRIVERS_DOOR_OPEN", "SCM_FEEDBACK", 1)]
+    signals.append(("DRIVERS_DOOR_OPEN", "SCM_FEEDBACK", 1))
   elif CP.carFingerprint == CAR.ODYSSEY_CHN:
-    signals += [("DRIVERS_DOOR_OPEN", "SCM_BUTTONS", 1)]
+    signals.append(("DRIVERS_DOOR_OPEN", "SCM_BUTTONS", 1))
   elif CP.carFingerprint in (CAR.FREED, CAR.HRV):
     signals += [("DRIVERS_DOOR_OPEN", "SCM_BUTTONS", 1),
                 ("WHEELS_MOVING", "STANDSTILL", 1)]
@@ -133,8 +129,8 @@ def get_can_signals(CP, gearbox_msg, main_on_sig_msg):
       ("EPB_STATUS", 50),
     ]
   elif CP.carFingerprint in (CAR.ODYSSEY, CAR.ODYSSEY_CHN):
-    signals += [("EPB_STATE", "EPB_STATUS", 0)]
-    checks += [("EPB_STATUS", 50)]
+    signals.append(("EPB_STATE", "EPB_STATUS", 0))
+    checks.append(("EPB_STATUS", 50))
 
   # add gas interceptor reading if we are using it
   if CP.enableGasInterceptor:
@@ -147,7 +143,7 @@ def get_can_signals(CP, gearbox_msg, main_on_sig_msg):
       ("BRAKE_ERROR_1", "STANDSTILL", 1),
       ("BRAKE_ERROR_2", "STANDSTILL", 1)
     ]
-    checks += [("STANDSTILL", 50)]
+    checks.append(("STANDSTILL", 50))
 
   return signals, checks
 
diff --git a/selfdrive/car/hyundai/carstate.py b/selfdrive/car/hyundai/carstate.py
index 205f293484f72e..8da60f1b8f90aa 100644
--- a/selfdrive/car/hyundai/carstate.py
+++ b/selfdrive/car/hyundai/carstate.py
@@ -206,7 +206,7 @@ def get_can_parser(CP):
           ("FCA_CmdAct", "FCA11"),
           ("CF_VSM_Warn", "FCA11"),
         ]
-        checks += [("FCA11", 50)]
+        checks.append(("FCA11", 50))
       else:
         signals += [
           ("AEB_CmdAct", "SCC12"),
@@ -218,20 +218,14 @@ def get_can_parser(CP):
         ("CF_Lca_IndLeft", "LCA11"),
         ("CF_Lca_IndRight", "LCA11"),
       ]
-      checks += [("LCA11", 50)]
+      checks.append(("LCA11", 50))
 
     if CP.carFingerprint in (HYBRID_CAR | EV_CAR):
       if CP.carFingerprint in HYBRID_CAR:
-        signals += [
-          ("CR_Vcu_AccPedDep_Pos", "E_EMS11")
-        ]
+        signals.append(("CR_Vcu_AccPedDep_Pos", "E_EMS11"))
       else:
-        signals += [
-          ("Accel_Pedal_Pos", "E_EMS11")
-        ]
-      checks += [
-        ("E_EMS11", 50),
-      ]
+        signals.append(("Accel_Pedal_Pos", "E_EMS11"))
+      checks.append(("E_EMS11", 50))
     else:
       signals += [
         ("PV_AV_CAN", "EMS12"),
@@ -243,29 +237,17 @@ def get_can_parser(CP):
       ]
 
     if CP.carFingerprint in FEATURES["use_cluster_gears"]:
-      signals += [
-        ("CF_Clu_Gear", "CLU15"),
-      ]
-      checks += [
-        ("CLU15", 5)
-      ]
+      signals.append(("CF_Clu_Gear", "CLU15"))
+      checks.append(("CLU15", 5))
     elif CP.carFingerprint in FEATURES["use_tcu_gears"]:
-      signals += [
-        ("CUR_GR", "TCU12")
-      ]
-      checks += [
-        ("TCU12", 100)
-      ]
+      signals.append(("CUR_GR", "TCU12"))
+      checks.append(("TCU12", 100))
     elif CP.carFingerprint in FEATURES["use_elect_gears"]:
-      signals += [("Elect_Gear_Shifter", "ELECT_GEAR")]
-      checks += [("ELECT_GEAR", 20)]
+      signals.append(("Elect_Gear_Shifter", "ELECT_GEAR"))
+      checks.append(("ELECT_GEAR", 20))
     else:
-      signals += [
-        ("CF_Lvr_Gear", "LVR12")
-      ]
-      checks += [
-        ("LVR12", 100)
-      ]
+      signals.append(("CF_Lvr_Gear", "LVR12"))
+      checks.append(("LVR12", 100))
 
     return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 0)
 
diff --git a/selfdrive/car/nissan/carstate.py b/selfdrive/car/nissan/carstate.py
index 1c88dfbc3eb03c..856383c34b95ab 100644
--- a/selfdrive/car/nissan/carstate.py
+++ b/selfdrive/car/nissan/carstate.py
@@ -218,12 +218,8 @@ def get_can_parser(CP):
       ]
       return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 1)
 
-    signals += [
-      ("STEER_TORQUE_DRIVER", "STEER_TORQUE_SENSOR"),
-    ]
-    checks += [
-      ("STEER_TORQUE_SENSOR", 100),
-    ]
+    signals.append(("STEER_TORQUE_DRIVER", "STEER_TORQUE_SENSOR"))
+    checks.append(("STEER_TORQUE_SENSOR", 100))
 
     return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 0)
 
@@ -345,19 +341,11 @@ def get_cam_can_parser(CP):
     checks = []
 
     if CP.carFingerprint in (CAR.ROGUE, CAR.XTRAIL):
-      signals += [
-        ("CRUISE_ON", "PRO_PILOT"),
-      ]
-      checks += [
-        ("PRO_PILOT", 100),
-      ]
+      signals.append(("CRUISE_ON", "PRO_PILOT"))
+      checks.append(("PRO_PILOT", 100))
     elif CP.carFingerprint == CAR.ALTIMA:
-      signals += [
-        ("STEER_TORQUE_DRIVER", "STEER_TORQUE_SENSOR"),
-      ]
-      checks += [
-        ("STEER_TORQUE_SENSOR", 100),
-      ]
+      signals.append(("STEER_TORQUE_DRIVER", "STEER_TORQUE_SENSOR"))
+      checks.append(("STEER_TORQUE_SENSOR", 100))
       return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 0)
 
     return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 1)
diff --git a/selfdrive/car/subaru/carstate.py b/selfdrive/car/subaru/carstate.py
index 53693d9a063f07..468f039d1bd561 100644
--- a/selfdrive/car/subaru/carstate.py
+++ b/selfdrive/car/subaru/carstate.py
@@ -119,9 +119,7 @@ def get_can_parser(CP):
         ("L_APPROACHING", "BSD_RCTA"),
         ("R_APPROACHING", "BSD_RCTA"),
       ]
-      checks += [
-        ("BSD_RCTA", 17),
-      ]
+      checks.append(("BSD_RCTA", 17))
 
     if CP.carFingerprint not in PREGLOBAL_CARS:
       signals += [
@@ -137,13 +135,9 @@ def get_can_parser(CP):
         ("CruiseControl", 20),
       ]
     else:
-      signals += [
-        ("UNITS", "Dash_State2"),
-      ]
+      signals.append(("UNITS", "Dash_State2"))
 
-      checks += [
-        ("Dash_State2", 1),
-      ]
+      checks.append(("Dash_State2", 1))
 
     if CP.carFingerprint == CAR.FORESTER_PREGLOBAL:
       checks += [
diff --git a/selfdrive/car/toyota/carstate.py b/selfdrive/car/toyota/carstate.py
index 3f35fcb575794f..752bbcedf255bc 100644
--- a/selfdrive/car/toyota/carstate.py
+++ b/selfdrive/car/toyota/carstate.py
@@ -201,9 +201,7 @@ def get_can_parser(CP):
         ("R_ADJACENT", "BSM", 0),
         ("R_APPROACHING", "BSM", 0),
       ]
-      checks += [
-        ("BSM", 1)
-      ]
+      checks.append(("BSM", 1))
 
     return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 0)
 
diff --git a/selfdrive/car/volkswagen/carstate.py b/selfdrive/car/volkswagen/carstate.py
index 9f8a97f34d8d11..79bd68cd41ce1c 100644
--- a/selfdrive/car/volkswagen/carstate.py
+++ b/selfdrive/car/volkswagen/carstate.py
@@ -212,15 +212,15 @@ def get_can_parser(CP):
     ]
 
     if CP.transmissionType == TransmissionType.automatic:
-      signals += [("GE_Fahrstufe", "Getriebe_11")]  # Auto trans gear selector position
-      checks += [("Getriebe_11", 20)]  # From J743 Auto transmission control module
+      signals.append(("GE_Fahrstufe", "Getriebe_11"))  # Auto trans gear selector position
+      checks.append(("Getriebe_11", 20))  # From J743 Auto transmission control module
     elif CP.transmissionType == TransmissionType.direct:
-      signals += [("GearPosition", "EV_Gearshift")]  # EV gear selector position
-      checks += [("EV_Gearshift", 10)]  # From J??? unknown EV control module
+      signals.append(("GearPosition", "EV_Gearshift"))  # EV gear selector position
+      checks.append(("EV_Gearshift", 10))  # From J??? unknown EV control module
     elif CP.transmissionType == TransmissionType.manual:
       signals += [("MO_Kuppl_schalter", "Motor_14"),  # Clutch switch
                   ("BCM1_Rueckfahrlicht_Schalter", "Gateway_72")]  # Reverse light from BCM
-      checks += [("Motor_14", 10)]  # From J623 Engine control module
+      checks.append(("Motor_14", 10))  # From J623 Engine control module
 
     if CP.networkLocation == NetworkLocation.fwdCamera:
       # Radars are here on CANBUS.pt