diff --git a/board/main_comms.h b/board/main_comms.h
index 01c47ba07..116f95d0e 100644
--- a/board/main_comms.h
+++ b/board/main_comms.h
@@ -311,7 +311,8 @@ int comms_control_handler(ControlPacket_t *req, uint8_t *resp) {
       }
 
       // read
-      while ((resp_len < MIN(req->length, USBPACKET_MAX_SIZE)) &&
+      uint16_t req_length = MIN(req->length, USBPACKET_MAX_SIZE);
+      while ((resp_len < req_length) &&
                          get_char(ur, (char*)&resp[resp_len])) {
         ++resp_len;
       }
diff --git a/board/safety.h b/board/safety.h
index e48a75502..50669e3bf 100644
--- a/board/safety.h
+++ b/board/safety.h
@@ -390,7 +390,8 @@ int set_safety_hooks(uint16_t mode, uint16_t param) {
 // convert a trimmed integer to signed 32 bit int
 int to_signed(int d, int bits) {
   int d_signed = d;
-  if (d >= (1 << MAX((bits - 1), 0))) {
+  int max_value = (1 << MAX((bits - 1), 0));
+  if (d >= max_value) {
     d_signed = d - (1 << MAX(bits, 0));
   }
   return d_signed;
diff --git a/board/safety/safety_chrysler.h b/board/safety/safety_chrysler.h
index 71bd19d30..1e1187128 100644
--- a/board/safety/safety_chrysler.h
+++ b/board/safety/safety_chrysler.h
@@ -264,7 +264,9 @@ static int chrysler_fwd_hook(int bus_num, int addr) {
 
 static safety_config chrysler_init(uint16_t param) {
   safety_config ret;
-  if (GET_FLAG(param, CHRYSLER_PARAM_RAM_DT)) {
+
+  bool enable_ram_dt = GET_FLAG(param, CHRYSLER_PARAM_RAM_DT);
+  if (enable_ram_dt) {
     chrysler_platform = CHRYSLER_RAM_DT;
     chrysler_addrs = &CHRYSLER_RAM_DT_ADDRS;
     ret = BUILD_SAFETY_CFG(chrysler_ram_dt_rx_checks, CHRYSLER_RAM_DT_TX_MSGS);
diff --git a/board/safety/safety_ford.h b/board/safety/safety_ford.h
index 6ab123be6..0424b9d09 100644
--- a/board/safety/safety_ford.h
+++ b/board/safety/safety_ford.h
@@ -222,7 +222,8 @@ static void ford_rx_hook(const CANPacket_t *to_push) {
       // Disable controls if speeds from ABS and PCM ECUs are too far apart.
       // Signal: Veh_V_ActlEng
       float filtered_pcm_speed = ((GET_BYTE(to_push, 6) << 8) | GET_BYTE(to_push, 7)) * 0.01 / 3.6;
-      if (ABS(filtered_pcm_speed - ((float)vehicle_speed.values[0] / VEHICLE_SPEED_FACTOR)) > FORD_MAX_SPEED_DELTA) {
+      bool is_invalid_speed = ABS(filtered_pcm_speed - ((float)vehicle_speed.values[0] / VEHICLE_SPEED_FACTOR)) > FORD_MAX_SPEED_DELTA;
+      if (is_invalid_speed) {
         controls_allowed = false;
       }
     }
diff --git a/board/safety/safety_honda.h b/board/safety/safety_honda.h
index 7bbc8e661..968a1a446 100644
--- a/board/safety/safety_honda.h
+++ b/board/safety/safety_honda.h
@@ -383,7 +383,9 @@ static safety_config honda_nidec_init(uint16_t param) {
   enable_gas_interceptor = GET_FLAG(param, HONDA_PARAM_GAS_INTERCEPTOR);
 
   safety_config ret;
-  if (GET_FLAG(param, HONDA_PARAM_NIDEC_ALT)) {
+  
+  bool enable_nidec_alt = GET_FLAG(param, HONDA_PARAM_NIDEC_ALT);
+  if (enable_nidec_alt) {
     enable_gas_interceptor ? SET_RX_CHECKS(honda_nidec_alt_interceptor_rx_checks, ret) : \
                              SET_RX_CHECKS(honda_nidec_alt_rx_checks, ret);
   } else {
diff --git a/tests/misra/suppressions.txt b/tests/misra/suppressions.txt
index 57db05a5f..2c91f868a 100644
--- a/tests/misra/suppressions.txt
+++ b/tests/misra/suppressions.txt
@@ -25,5 +25,4 @@ misra-c2012-8.7
 misra-c2012-8.4
 misra-c2012-10.6
 misra-c2012-10.3
-misra-c2012-17.3
 misra-c2012-21.15