diff --git a/src/Messages/BookingCodesMessage.php b/src/Messages/BookingCodesMessage.php
index 33378ded2..ac3dc538d 100644
--- a/src/Messages/BookingCodesMessage.php
+++ b/src/Messages/BookingCodesMessage.php
@@ -59,18 +59,18 @@ public function sendMessage(): bool {
 
 		$bookingTable = \CommonsBooking\View\BookingCodes::renderTableFor( 'email', $bookingCodes );
 
-		$cb_settings_option = Settings::getOption( 'commonsbooking_options_bookingcodes', 'mail-booking-' . $this->action . '-attach-ical' );
+		$cbSettingsOption = Settings::getOption( 'commonsbooking_options_bookingcodes', 'mail-booking-' . $this->action . '-attach-ical' );
 		/**
 		 * Default value (from option settings) whether adding the ical attachment to booking codes email.
 		 *
 		 * @since 2.9.0
 		 *
-		 * @param bool $cb_settings_option
+		 * @param bool $cbSettingsOption
 		 * @param \CommonsBooking\Model\Timeframe $timeframe for which the booking codes are sent
 		 */
 		$bAddIcal   = apply_filters(
 			'commonsbooking_emailcodes_addical',
-			$cb_settings_option,
+			$cbSettingsOption,
 			$timeframe
 		);
 		$attachment = $bAddIcal ? $this->getIcalAttachment( $bookingCodes ) : null;
diff --git a/src/Repository/UserRepository.php b/src/Repository/UserRepository.php
index 76a7ef47c..cd9d49f7d 100644
--- a/src/Repository/UserRepository.php
+++ b/src/Repository/UserRepository.php
@@ -23,15 +23,15 @@ public static function getSelectableCBManagers() {
 	 * @return string[]
 	 */
 	public static function getManagerRoles(): array {
-		$manager_roles = [ Plugin::$CB_MANAGER_ID ];
+		$managerRoles = [ Plugin::$CB_MANAGER_ID ];
 		/**
 		 * Default list of manager roles
 		 *
 		 * @since 2.9.0
 		 *
-		 * @param string[] $manager_roles list of allowed manager roles that is returned by {@see UserRepository::getManagerRoles()}
+		 * @param string[] $managerRoles list of allowed manager roles that is returned by {@see UserRepository::getManagerRoles()}
 		 */
-		return apply_filters( 'commonsbooking_manager_roles', $manager_roles );
+		return apply_filters( 'commonsbooking_manager_roles', $managerRoles );
 	}
 
 	/**
@@ -40,15 +40,15 @@ public static function getManagerRoles(): array {
 	 * @return string[]
 	 */
 	public static function getAdminRoles(): array {
-		$admin_roles = [ 'administrator' ];
+		$adminRoles = [ 'administrator' ];
 		/**
 		 * Default list of admin roles
 		 *
 		 * @since 2.8.3
 		 *
-		 * @param string[] $admin_roles list of allowed admin roles that are returned by {@see UserRepository::getAdminRoles()}
+		 * @param string[] $adminRoles list of allowed admin roles that are returned by {@see UserRepository::getAdminRoles()}
 		 */
-		return apply_filters( 'commonsbooking_admin_roles', $admin_roles );
+		return apply_filters( 'commonsbooking_admin_roles', $adminRoles );
 	}
 
 	/**