diff --git a/board/safety/safety_chrysler.h b/board/safety/safety_chrysler.h
index 631dbecde9..42ad0df7e4 100644
--- a/board/safety/safety_chrysler.h
+++ b/board/safety/safety_chrysler.h
@@ -83,12 +83,12 @@ static void chrysler_rx_hook(const CANPacket_t *to_push) {
   // TODO: use the same message for both
   // update vehicle moving
   if ((chrysler_platform != CHRYSLER_PACIFICA) && (bus == 0) && (addr == chrysler_addrs->ESP_8)) {
-    vehicle_moving = ((GET_BYTE(to_push, 4) << 8) + GET_BYTE(to_push, 5)) != 0U;
+    vehicle_moving = (GET_BYTE(to_push, 4) != 0U) || (GET_BYTE(to_push, 5) != 0U);
   }
   if ((chrysler_platform == CHRYSLER_PACIFICA) && (bus == 0) && (addr == 514)) {
-    int speed_l = (GET_BYTE(to_push, 0) << 4) + (GET_BYTE(to_push, 1) >> 4);
-    int speed_r = (GET_BYTE(to_push, 2) << 4) + (GET_BYTE(to_push, 3) >> 4);
-    vehicle_moving = (speed_l != 0) || (speed_r != 0);
+    bool speed_l_non_zero = ((GET_BYTE(to_push, 0) << 4) != 0U) || ((GET_BYTE(to_push, 1) >> 4) != 0U);
+    bool speed_r_non_zero = ((GET_BYTE(to_push, 2) << 4) != 0U) || ((GET_BYTE(to_push, 3) >> 4) != 0U);
+    vehicle_moving = speed_l_non_zero || speed_r_non_zero;
   }
 
   // exit controls on rising edge of gas press
diff --git a/tests/safety/test_chrysler.py b/tests/safety/test_chrysler.py
index 5bbb6dd103..473501a66a 100755
--- a/tests/safety/test_chrysler.py
+++ b/tests/safety/test_chrysler.py
@@ -6,29 +6,18 @@
 from panda.tests.safety.common import CANPackerPanda
 
 
-class TestChryslerSafety(common.PandaCarSafetyTest, common.MotorTorqueSteeringSafetyTest):
-  TX_MSGS = [[0x23B, 0], [0x292, 0], [0x2A6, 0]]
+class TestChryslerSafetyBase(common.PandaCarSafetyTest, common.MotorTorqueSteeringSafetyTest):
   STANDSTILL_THRESHOLD = 0
-  RELAY_MALFUNCTION_ADDRS = {0: (0x292,)}
-  FWD_BLACKLISTED_ADDRS = {2: [0x292, 0x2A6]}
   FWD_BUS_LOOKUP = {0: 2, 2: 0}
 
-  MAX_RATE_UP = 3
-  MAX_RATE_DOWN = 3
-  MAX_TORQUE = 261
   MAX_RT_DELTA = 112
   RT_INTERVAL = 250000
   MAX_TORQUE_ERROR = 80
 
-  LKAS_ACTIVE_VALUE = 1
-
-  DAS_BUS = 0
-
-  def setUp(self):
-    self.packer = CANPackerPanda("chrysler_pacifica_2017_hybrid_generated")
-    self.safety = libpanda_py.libpanda
-    self.safety.set_safety_hooks(Panda.SAFETY_CHRYSLER, 0)
-    self.safety.init_tests()
+  @classmethod
+  def setUpClass(cls):
+    if cls.__name__ == "TestChryslerSafetyBase":
+      raise unittest.SkipTest
 
   def _button_msg(self, cancel=False, resume=False):
     values = {"ACC_Cancel": cancel, "ACC_Resume": resume}
@@ -72,8 +61,82 @@ def test_buttons(self):
       self.assertFalse(self._tx(self._button_msg(cancel=True, resume=True)))
       self.assertFalse(self._tx(self._button_msg(cancel=False, resume=False)))
 
+class TestChryslerPacificaSafety(TestChryslerSafetyBase):
+  TX_MSGS = [[0x23B, 0], [0x292, 0], [0x2A6, 0]]
+  RELAY_MALFUNCTION_ADDRS = {0: (0x292,)}
+  FWD_BLACKLISTED_ADDRS = {2: [0x292, 0x2A6]}
+
+  MAX_RATE_UP = 3
+  MAX_RATE_DOWN = 3
+  MAX_TORQUE = 261
+
+  LKAS_ACTIVE_VALUE = 1
+
+  DAS_BUS = 0
+
+  def setUp(self):
+    self.packer = CANPackerPanda("chrysler_pacifica_2017_hybrid_generated")
+    self.safety = libpanda_py.libpanda
+    self.safety.set_safety_hooks(Panda.SAFETY_CHRYSLER, 0)
+    self.safety.init_tests()
+
+  def _speed_msg(self, speed):
+    values = {"SPEED_LEFT": speed, "SPEED_RIGHT": speed}
+    return self.packer.make_can_msg_panda("SPEED_1", 0, values)
 
-class TestChryslerRamDTSafety(TestChryslerSafety):
+  def test_rx_hook_vehicle_moving(self):
+    self.assertFalse(self.safety.get_vehicle_moving())
+
+    # speed_l byte 0
+    msg = self._speed_msg(0)
+    msg[0].data[0] = 15
+    self.assertTrue(self._rx(msg))
+    self.assertTrue(self.safety.get_vehicle_moving())
+
+    # speed_l byte 1
+    msg = self._speed_msg(0)
+    msg[0].data[1] = 8
+    self.assertTrue(self._rx(msg))
+    self.assertFalse(self.safety.get_vehicle_moving())
+
+    # speed_r byte 2
+    msg = self._speed_msg(0)
+    msg[0].data[2] = 15
+    self.assertTrue(self._rx(msg))
+    self.assertTrue(self.safety.get_vehicle_moving())
+
+    # speed_r byte 3
+    msg = self._speed_msg(0)
+    msg[0].data[3] = 8
+    self.assertTrue(self._rx(msg))
+    self.assertFalse(self.safety.get_vehicle_moving())
+
+class TestChryslerRamSafetyBase(TestChryslerSafetyBase):
+  @classmethod
+  def setUpClass(cls):
+    if cls.__name__ == "TestChryslerRamSafetyBase":
+      raise unittest.SkipTest
+
+  def test_rx_hook_vehicle_moving(self):
+    self.assertFalse(self.safety.get_vehicle_moving())
+
+    # test 4th bytes = 0, 5th bytes = 0
+    self.assertTrue(self._rx(self._speed_msg(0)))
+    self.assertFalse(self.safety.get_vehicle_moving())
+
+    # test 4th bytes = 0, 5th bytes = 128
+    self.assertTrue(self._rx(self._speed_msg(1)))
+    self.assertTrue(self.safety.get_vehicle_moving())
+
+    # test 4th bytes = 1, 5th bytes = 0
+    self.assertTrue(self._rx(self._speed_msg(2)))
+    self.assertTrue(self.safety.get_vehicle_moving())
+
+    # test 4th bytes = 1, 5th bytes = 128
+    self.assertTrue(self._rx(self._speed_msg(3)))
+    self.assertTrue(self.safety.get_vehicle_moving())
+
+class TestChryslerRamDTSafety(TestChryslerRamSafetyBase):
   TX_MSGS = [[0xB1, 2], [0xA6, 0], [0xFA, 0]]
   RELAY_MALFUNCTION_ADDRS = {0: (0xA6,)}
   FWD_BLACKLISTED_ADDRS = {2: [0xA6, 0xFA]}
@@ -96,7 +159,7 @@ def _speed_msg(self, speed):
     values = {"Vehicle_Speed": speed}
     return self.packer.make_can_msg_panda("ESP_8", 0, values)
 
-class TestChryslerRamHDSafety(TestChryslerSafety):
+class TestChryslerRamHDSafety(TestChryslerRamSafetyBase):
   TX_MSGS = [[0x275, 0], [0x276, 0], [0x23A, 2]]
   RELAY_MALFUNCTION_ADDRS = {0: (0x276,)}
   FWD_BLACKLISTED_ADDRS = {2: [0x275, 0x276]}