diff --git a/src/main/java/seedu/address/logic/commands/LeaveCommand.java b/src/main/java/seedu/address/logic/commands/LeaveCommand.java
index eb6bd25813f..e8817512175 100644
--- a/src/main/java/seedu/address/logic/commands/LeaveCommand.java
+++ b/src/main/java/seedu/address/logic/commands/LeaveCommand.java
@@ -24,7 +24,7 @@ public class LeaveCommand extends Command {
     public static final String MESSAGE_USAGE = COMMAND_WORD + ": Adds leave months for an employee.\n"
             + "Parameters: INDEX (must be a positive integer) " + PREFIX_MONTH + "MONTHS\n"
             + "Format: MONTHS must be integers separated by commas without spaces. "
-            + "1 - Jan, 2 - Feb, ..., 12 - Dec.\n"
+            + "1: Jan, 2: Feb, ..., 12: Dec.\n"
             + "Example: " + COMMAND_WORD + " 1 "
             + PREFIX_MONTH + "3,-4 to add leave in March and remove leave in April.";
 
diff --git a/src/test/java/seedu/address/logic/commands/CommandTestUtil.java b/src/test/java/seedu/address/logic/commands/CommandTestUtil.java
index 552fa60db05..75258652594 100644
--- a/src/test/java/seedu/address/logic/commands/CommandTestUtil.java
+++ b/src/test/java/seedu/address/logic/commands/CommandTestUtil.java
@@ -67,6 +67,7 @@ public class CommandTestUtil {
     public static final String INVALID_EMAIL_DESC = " " + PREFIX_EMAIL + "bob!yahoo"; // missing '@' symbol
     public static final String INVALID_ADDRESS_DESC = " " + PREFIX_ADDRESS; // empty string not allowed for addresses
     public static final String INVALID_TAG_DESC = " " + PREFIX_TAG + "hubby*"; // '*' not allowed in tags
+    public static final String INVALID_LEAVE = "1+";
 
     public static final String PREAMBLE_WHITESPACE = "\t  \r  \n";
     public static final String PREAMBLE_NON_EMPTY = "NonEmptyPreamble";
diff --git a/src/test/java/seedu/address/model/person/LeaveTest.java b/src/test/java/seedu/address/model/person/LeaveTest.java
new file mode 100644
index 00000000000..a213ecc8d7a
--- /dev/null
+++ b/src/test/java/seedu/address/model/person/LeaveTest.java
@@ -0,0 +1,26 @@
+package seedu.address.model.person;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static seedu.address.logic.commands.CommandTestUtil.VALID_LEAVE;
+import static seedu.address.logic.commands.CommandTestUtil.INVALID_LEAVE;
+import static seedu.address.testutil.TypicalPersons.ALICE;
+import static seedu.address.testutil.TypicalPersons.BOB;
+
+import org.junit.jupiter.api.Test;
+
+public class LeaveTest {
+
+    @Test
+    public void validLeave() {
+        assertEquals(new Leave().leave, Leave.NO_LEAVE);
+        assertTrue(Leave.isValidLeave(ALICE.getLeave().leave));
+        assertTrue(Leave.isValidLeave(BOB.getLeave().leave));
+        assertTrue(Leave.isValidLeave(VALID_LEAVE));
+        assertFalse(Leave.isValidLeave(INVALID_LEAVE));
+        assertEquals(new Leave().toString(), "-");
+        assertEquals(ALICE.getLeave().leave, "111101010101");
+        assertEquals(ALICE.getLeave().toString(), "Jan, Feb, Mar, Apr, Jun, Aug, Oct, Dec");
+    }
+}
diff --git a/src/test/java/seedu/address/model/person/PersonTest.java b/src/test/java/seedu/address/model/person/PersonTest.java
index de93a5098f4..eb578347ef0 100644
--- a/src/test/java/seedu/address/model/person/PersonTest.java
+++ b/src/test/java/seedu/address/model/person/PersonTest.java
@@ -17,11 +17,6 @@
 
 public class PersonTest {
 
-    @Test
-    public void asObservableList_modifyList_throwsUnsupportedOperationException() {
-        Person person = new PersonBuilder().build();
-    }
-
     @Test
     public void isSamePerson() {
         // same object -> returns true
diff --git a/src/test/java/seedu/address/testutil/PersonBuilder.java b/src/test/java/seedu/address/testutil/PersonBuilder.java
index b354bae3913..6de67a19782 100644
--- a/src/test/java/seedu/address/testutil/PersonBuilder.java
+++ b/src/test/java/seedu/address/testutil/PersonBuilder.java
@@ -145,7 +145,7 @@ public PersonBuilder withLeave(String leave) {
     }
 
     public Person build() {
-        return new Person(name, phone, email, address, salary, claimBudget, department, dob);
+        return new Person(name, phone, email, address, salary, claimBudget, department, dob, leave);
     }
 
 }