diff --git a/src/fw/comm/ble/kernel_le_client/ams/ams_util.h b/src/fw/comm/ble/kernel_le_client/ams/ams_util.h
index 95370a22..5eb7a741 100644
--- a/src/fw/comm/ble/kernel_le_client/ams/ams_util.h
+++ b/src/fw/comm/ble/kernel_le_client/ams/ams_util.h
@@ -25,7 +25,7 @@
 //! The string does not have to be zero-terminated, since the length is passed as an argument.
 //! @param number_str_length The length of the number_str buffer.
 //! @param multiplier The factor by which to multiply the parsed number.
-//! @param[out] number_out If the parsing was succesfull, the result will be stored here.
+//! @param[out] number_out If the parsing was successful, the result will be stored here.
 //! @return True if the string was parsed succesfully.
 //! @note The first comma or period found is treated as decimal separator. Any subsequent comma or
 //! period that is found will cause parsing to be aborted and return false.
diff --git a/src/fw/mfg/mfg_serials.h b/src/fw/mfg/mfg_serials.h
index 3380160c..0c03320a 100644
--- a/src/fw/mfg/mfg_serials.h
+++ b/src/fw/mfg/mfg_serials.h
@@ -50,7 +50,7 @@ typedef enum MfgSerialsResult {
 //! zero. Must be 13.
 //! @param[out] out_index Will contain the OTP index that was used to write the
 //! serial number, if the return value was OtpWriteSuccess.
-//! @return OtpWriteSuccess if the write was successfull or
+//! @return OtpWriteSuccess if the write was successful or
 //! MfgSerialsResultFailNoMoreSpace if all 3 slots were taken already, or
 //! MfgSerialsResultFailIncorrectLength if the serial_size was not 13.
 MfgSerialsResult mfg_write_serial_number(const char* serial, size_t serial_size, uint8_t *out_index);
diff --git a/tests/fakes/fake_GAPAPI.c b/tests/fakes/fake_GAPAPI.c
index b058e36a..2fb44ce3 100644
--- a/tests/fakes/fake_GAPAPI.c
+++ b/tests/fakes/fake_GAPAPI.c
@@ -207,7 +207,7 @@ int GAP_LE_Cancel_Create_Connection(unsigned int BluetoothStackID) {
   return 0;
 }
 
-// Puts the event that the BT Controller will emit after a succesfull
+// Puts the event that the BT Controller will emit after a successful
 // GAP_LE_Cancel_Create_Connection call.
 void fake_gap_le_put_cancel_create_event(const BTDeviceInternal *device, bool is_master) {
   fake_gap_put_connection_event(HCI_ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER,