diff --git a/src/main/java/seedu/omnitravel/parser/Parser.java b/src/main/java/seedu/omnitravel/parser/Parser.java
index f9e22ed03b..1f85c40dc4 100644
--- a/src/main/java/seedu/omnitravel/parser/Parser.java
+++ b/src/main/java/seedu/omnitravel/parser/Parser.java
@@ -12,8 +12,6 @@
 import java.time.LocalDate;
 import java.util.logging.Logger;
 
-import static seedu.omnitravel.errorhandlers.CheckParameters.isNumeric;
-
 public class Parser {
 
     private static Logger logger = Logger.getLogger("ParserLogger");
@@ -151,7 +149,7 @@ public static void addCommand(String line, TravelActivityList list) throws OmniE
      * @throws OmniException if command.length != 2 && command[1] is not numeric
      */
     public static void deleteCommand(String[] command, TravelActivityList list) throws OmniException {
-        if (command.length == 2 && isNumeric(command[1])){
+        if (command.length == 2 && CheckParameters.isNumeric(command[1])){
             int listNumber = Integer.parseInt(command[1]);
             list.removeTravelActivity(listNumber);
         } else {
@@ -167,7 +165,7 @@ public static void deleteCommand(String[] command, TravelActivityList list) thro
      * @throws OmniException if command.length != 2 && command[1] is not numeric
      */
     public static void checkCommand(String[] command, TravelActivityList list) throws OmniException {
-        if (command.length == 2 && isNumeric(command[1])){
+        if (command.length == 2 && CheckParameters.isNumeric(command[1])){
             int listNumber = Integer.parseInt(command[1]);
             list.checkTravelActivity(listNumber);
         } else {
@@ -183,7 +181,7 @@ public static void checkCommand(String[] command, TravelActivityList list) throw
      * @throws OmniException if command.length != 2 && command[1] is not numeric
      */
     public static void uncheckCommand(String[] command, TravelActivityList list) throws OmniException {
-        if (command.length == 2 && isNumeric(command[1])){
+        if (command.length == 2 && CheckParameters.isNumeric(command[1])){
             int listNumber = Integer.parseInt(command[1]);
 
             list.uncheckTravelActivity(listNumber);
@@ -202,7 +200,7 @@ public static void uncheckCommand(String[] command, TravelActivityList list) thr
      */
     public static void tagCommand(String line, TravelActivityList list) throws OmniException {
         String[] command = line.split(" ");
-        if (command.length >= 3 && isNumeric(command[1])){
+        if (command.length >= 3 && CheckParameters.isNumeric(command[1])){
             String index = command[1];
             String[] tagSplit = line.split(index);
             String tag = tagSplit[1].trim();
@@ -223,7 +221,7 @@ public static void tagCommand(String line, TravelActivityList list) throws OmniE
      * @throws OmniException if command.length != 2 && command[1] is not numeric
      */
     public static void removeTagCommand(String[] command, TravelActivityList list) throws OmniException {
-        if (command.length == 2 && isNumeric(command[1])) {
+        if (command.length == 2 && CheckParameters.isNumeric(command[1])) {
             int listNumber = Integer.parseInt(command[1]);
             list.removeTag(listNumber);
         } else {
@@ -308,7 +306,7 @@ public static void findCommand(String line, TravelActivityList list) throws Omni
      */
     public static void expenseCommand(String line, TravelActivityList list) throws OmniException {
         String[] command = line.split(" ");
-        if (command.length == 3 && isNumeric(command[1])){
+        if (command.length == 3 && CheckParameters.isNumeric(command[1])){
             int listNumber = Integer.parseInt(command[1]);
             String expense = command[2];
             list.expenseActivity(listNumber, expense);
@@ -327,7 +325,7 @@ public static void expenseCommand(String line, TravelActivityList list) throws O
      * @throws OmniException if command.length != 2 && command[1] is not numeric
      */
     public static void removeExpenseCommand(String[] command, TravelActivityList list) throws OmniException {
-        if (command.length == 2 && isNumeric(command[1])) {
+        if (command.length == 2 && CheckParameters.isNumeric(command[1])) {
             int listNumber = Integer.parseInt(command[1]);
             list.removeExpense(listNumber);
         } else {
@@ -369,7 +367,7 @@ public static void totalExpenseCommand(String line, TravelActivityList list) thr
      */
     public static void locationCommand(String line, TravelActivityList list) throws OmniException {
         String[] command = line.split(" ");
-        if (command.length >= 3 && isNumeric(command[1])){
+        if (command.length >= 3 && CheckParameters.isNumeric(command[1])){
             String index = command[1];
             String[] locationSplit = line.split(index);
             String location = locationSplit[1].trim();
@@ -390,7 +388,7 @@ public static void locationCommand(String line, TravelActivityList list) throws
      * @throws OmniException if command.length != 2 && command[1] is not numeric
      */
     public static void removeLocationCommand(String[] command, TravelActivityList list) throws OmniException {
-        if (command.length == 2 && isNumeric(command[1])) {
+        if (command.length == 2 && CheckParameters.isNumeric(command[1])) {
             int listNumber = Integer.parseInt(command[1]);
             list.removeLocation(listNumber);
         } else {
diff --git a/src/test/java/seedu/omnitravel/OmniTravelTest.java b/src/test/java/seedu/omnitravel/OmniTravelTest.java
index 8a5aae5db1..2e37fdf5f1 100644
--- a/src/test/java/seedu/omnitravel/OmniTravelTest.java
+++ b/src/test/java/seedu/omnitravel/OmniTravelTest.java
@@ -378,13 +378,13 @@ public void testListTags() throws OmniException {
 
         // Testcases without tags
         list.addTravelActivity(new Accommodation("Airbnb",
-                LocalDate.parse("2012-12-12"), "2hours", "", ""));
+                LocalDate.parse("2012-12-12"), "2hours", "",  "", ""));
         list.addTravelActivity(new Food("Takoyaki",
-                LocalDate.parse("2012-12-12"), "2hours", "", ""));
+                LocalDate.parse("2012-12-12"), "2hours", "", "",  ""));
         list.addTravelActivity(new Landmark("Pyramid",
-                LocalDate.parse("2012-12-12"), "2hours", "", ""));
+                LocalDate.parse("2012-12-12"), "2hours", "", "", ""));
         list.addTravelActivity(new TravelActivity("Go home",
-                LocalDate.parse("2012-12-12"), "2hours", "", ""));
+                LocalDate.parse("2012-12-12"), "2hours", "", "", ""));
 
         list.listTags();
         String expectedOutput = "1. campus stay" + System.lineSeparator()