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diff --git a/lib/opentest4j-1.1.1.jar b/lib/opentest4j-1.1.1.jar
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diff --git a/lib/testng-6.14.3.jar b/lib/testng-6.14.3.jar
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diff --git a/src/main/java/duke/entity/command/Command.java b/src/main/java/duke/entity/command/Command.java
index f9435f0d8c..cd59f236a5 100644
--- a/src/main/java/duke/entity/command/Command.java
+++ b/src/main/java/duke/entity/command/Command.java
@@ -6,6 +6,7 @@
 
 public abstract class Command {
 
+
     /**
      * Executes the task based on the eventual type
      *
diff --git a/src/main/java/test/java/duke/entity/task/DeadlineTest.java b/src/main/java/test/java/duke/entity/task/DeadlineTest.java
new file mode 100644
index 0000000000..b5d92f7173
--- /dev/null
+++ b/src/main/java/test/java/duke/entity/task/DeadlineTest.java
@@ -0,0 +1,14 @@
+package test.java.duke.entity.task;
+
+import duke.entity.task.Deadline;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class DeadlineTest {
+
+    @Test
+    void printTask_withDateTimeFormatChange_success() {
+        assertEquals(new Deadline("do homework", "2020-02-10 19:00").printTask(), "[D][\u2718] do homework (by: Mon, 10 Feb 2020 07:00 PM)");
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/test/java/duke/parser/CommandParserTest.java b/src/main/java/test/java/duke/parser/CommandParserTest.java
new file mode 100644
index 0000000000..05f550d72a
--- /dev/null
+++ b/src/main/java/test/java/duke/parser/CommandParserTest.java
@@ -0,0 +1,19 @@
+package test.java.duke.parser;
+
+import duke.entity.command.AddCommand;
+import duke.entity.task.Event;
+import duke.entity.task.Todo;
+import duke.handler.Ui;
+import duke.parser.CommandParser;
+import org.testng.annotations.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class CommandParserTest {
+
+    @Test
+    public void parse_todoCommand_success() {
+        assertEquals(new AddCommand(new Todo("read book")).getNewTask().getTaskName(), ((AddCommand) new CommandParser(new Ui()).parse("todo read book")).getNewTask().getTaskName());
+    }
+}
diff --git a/src/main/java/test/java/duke/parser/DateTimeParserTest.java b/src/main/java/test/java/duke/parser/DateTimeParserTest.java
new file mode 100644
index 0000000000..0ca0cbfa2b
--- /dev/null
+++ b/src/main/java/test/java/duke/parser/DateTimeParserTest.java
@@ -0,0 +1,22 @@
+package test.java.duke.parser;
+
+import duke.parser.DateTimeParser;
+import org.junit.jupiter.api.Test;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class DateTimeParserTest {
+
+    @Test
+    void parseDate_20200201_success() throws ParseException {
+        assertEquals(new DateTimeParser().parseDate("2020-02-01").getTime(), new SimpleDateFormat("yyyy-MM-dd").parse("2020-02-01").getTime());
+    }
+
+    @Test
+    void parseTime() throws ParseException {
+        assertEquals(new DateTimeParser().parseTime("18:00").getTime(), new SimpleDateFormat("HH:mm").parse("18:00").getTime());
+    }
+}
\ No newline at end of file