diff --git a/src/main/java/seedu/address/logic/commands/FilterCommand.java b/src/main/java/seedu/address/logic/commands/FilterCommand.java
index d5c5a49d3b1..0e5261f098a 100644
--- a/src/main/java/seedu/address/logic/commands/FilterCommand.java
+++ b/src/main/java/seedu/address/logic/commands/FilterCommand.java
@@ -81,6 +81,7 @@ public CommandResult execute(Model model) {
         return new CommandResult(
                 String.format(Messages.MESSAGE_PERSONS_LISTED_OVERVIEW, model.getFilteredPersonList().size()));
     }
+
     @Override
     public boolean equals(Object other) {
         if (other == this) {
diff --git a/src/test/java/seedu/address/logic/commands/FilterCommandTest.java b/src/test/java/seedu/address/logic/commands/FilterCommandTest.java
index c65698c06c0..c31bee08484 100644
--- a/src/test/java/seedu/address/logic/commands/FilterCommandTest.java
+++ b/src/test/java/seedu/address/logic/commands/FilterCommandTest.java
@@ -66,6 +66,29 @@ public void execute_zeroKeywords_noPersonFound() {
         assertEquals(Collections.emptyList(), model.getFilteredPersonList());
     }
 
+    @Test
+    public void executeNoKeywordsCourseFilter() {
+        String expectedMessage = String.format(MESSAGE_PERSONS_LISTED_OVERVIEW, 0);
+        CourseContainsKeywordsPredicate predicate =
+                new CourseContainsKeywordsPredicate(Collections.singletonList(" "));
+        FilterCommand command = new FilterCommand(predicate);
+        expectedModel.updateFilteredPersonList(predicate);
+        assertCommandSuccess(command, model, expectedMessage, expectedModel);
+        assertEquals(Collections.emptyList(), model.getFilteredPersonList());
+    }
+
+    @Test
+    public void executeNoKeywordsModuleFilter() {
+        String expectedMessage = String.format(MESSAGE_PERSONS_LISTED_OVERVIEW, 0);
+        ModuleContainsKeywordsPredicate predicate =
+                new ModuleContainsKeywordsPredicate("  ");
+        FilterCommand command = new FilterCommand(predicate);
+        expectedModel.updateFilteredPersonList(predicate);
+        assertCommandSuccess(command, model, expectedMessage, expectedModel);
+        assertEquals(Collections.emptyList(), model.getFilteredPersonList());
+    }
+
+
     @Test
     public void execute_multipleKeywords_multiplePersonsFound() {
         String expectedMessage = String.format(MESSAGE_PERSONS_LISTED_OVERVIEW, 3);
@@ -78,7 +101,8 @@ public void execute_multipleKeywords_multiplePersonsFound() {
 
     @Test
     public void toStringMethod_namePredicate() {
-        NameContainsKeywordsPredicate predicate = new NameContainsKeywordsPredicate(Arrays.asList("keyword"));
+        NameContainsKeywordsPredicate predicate =
+                new NameContainsKeywordsPredicate(Arrays.asList("keyword"));
         FilterCommand filterCommand = new FilterCommand(predicate);
         String expected = FilterCommand.class.getCanonicalName()
                 + "{namePredicate="
@@ -90,7 +114,8 @@ public void toStringMethod_namePredicate() {
 
     @Test
     public void toStringMethod_modulePredicate() {
-        ModuleContainsKeywordsPredicate modulePredicate = new ModuleContainsKeywordsPredicate("CS2103T");
+        ModuleContainsKeywordsPredicate modulePredicate =
+                new ModuleContainsKeywordsPredicate("CS2103T");
         FilterCommand filterCommand = new FilterCommand(modulePredicate);
         String expected = FilterCommand.class.getCanonicalName()
                 + "{namePredicate=null, modulePredicate="
diff --git a/src/test/java/seedu/address/model/ModelManagerTest.java b/src/test/java/seedu/address/model/ModelManagerTest.java
index 4132a925e9e..1cb573fdb4a 100644
--- a/src/test/java/seedu/address/model/ModelManagerTest.java
+++ b/src/test/java/seedu/address/model/ModelManagerTest.java
@@ -15,7 +15,9 @@
 import org.junit.jupiter.api.Test;
 
 import seedu.address.commons.core.GuiSettings;
+import seedu.address.model.person.CourseContainsKeywordsPredicate;
 import seedu.address.model.person.Module;
+import seedu.address.model.person.ModuleContainsKeywordsPredicate;
 import seedu.address.model.person.NameContainsKeywordsPredicate;
 import seedu.address.testutil.EduContactsBuilder;
 
@@ -167,11 +169,21 @@ public void equals() {
         // different eduContacts -> returns false
         assertFalse(modelManager.equals(new ModelManager(differentEduContacts, userPrefs)));
 
-        // different filteredList -> returns false
+        // different filteredList (NameContainsKeywordsPredicate) -> returns false
         String[] keywords = ALICE.getName().fullName.split("\\s+");
         modelManager.updateFilteredPersonList(new NameContainsKeywordsPredicate(Arrays.asList(keywords)));
         assertFalse(modelManager.equals(new ModelManager(eduContacts, userPrefs)));
 
+        // different filteredList (ModuleContainsKeywordsPredicate) -> returns false
+        String moduleKeyword = "CS1010";
+        modelManager.updateFilteredPersonList(new ModuleContainsKeywordsPredicate(moduleKeyword));
+        assertFalse(modelManager.equals(new ModelManager(eduContacts, userPrefs)));
+
+        // different filteredList (CourseContainsKeywordsPredicate) -> return false
+        String courseKeyword = "Computer Science";
+        modelManager.updateFilteredPersonList(new CourseContainsKeywordsPredicate(Arrays.asList(courseKeyword)));
+        assertFalse(modelManager.equals(new ModelManager(eduContacts, userPrefs)));
+
         // different personToDisplay -> returns false
         assertFalse(modelManager.equals(new ModelManager(eduContacts, userPrefs)));
 
diff --git a/src/test/java/seedu/address/model/person/ModuleContainsKeywordsPredicateTest.java b/src/test/java/seedu/address/model/person/ModuleContainsKeywordsPredicateTest.java
new file mode 100644
index 00000000000..0b3680ee138
--- /dev/null
+++ b/src/test/java/seedu/address/model/person/ModuleContainsKeywordsPredicateTest.java
@@ -0,0 +1,67 @@
+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 org.junit.jupiter.api.Test;
+
+import seedu.address.testutil.PersonBuilder;
+
+public class ModuleContainsKeywordsPredicateTest {
+
+    @Test
+    public void equals() {
+        String firstPredicateKeyword = "CS1010";
+        String secondPredicateKeyword = "CS2030";
+
+        ModuleContainsKeywordsPredicate firstPredicate =
+                new ModuleContainsKeywordsPredicate(firstPredicateKeyword);
+        ModuleContainsKeywordsPredicate secondPredicate =
+                new ModuleContainsKeywordsPredicate(secondPredicateKeyword);
+
+        // same object -> returns true
+        assertTrue(firstPredicate.equals(firstPredicate));
+
+        // same values -> returns true
+        ModuleContainsKeywordsPredicate firstPredicateCopy =
+                new ModuleContainsKeywordsPredicate(firstPredicateKeyword);
+        assertTrue(firstPredicate.equals(firstPredicateCopy));
+
+        // different types -> returns false
+        assertFalse(firstPredicate.equals(1));
+
+        // null -> returns false
+        assertFalse(firstPredicate.equals(null));
+
+        // different predicate -> returns false
+        assertFalse(firstPredicate.equals(secondPredicate));
+    }
+
+    @Test
+    public void test_moduleContainsKeyword_returnsTrue() {
+        ModuleContainsKeywordsPredicate predicate = new ModuleContainsKeywordsPredicate("CS1010");
+        assertTrue(predicate.test(new PersonBuilder().addUngradedModule("CS1010").build()));
+
+        predicate = new ModuleContainsKeywordsPredicate("cs1010");
+        assertTrue(predicate.test(new PersonBuilder().addUngradedModule("CS1010").build()));
+
+        predicate = new ModuleContainsKeywordsPredicate("1010");
+        assertTrue(predicate.test(new PersonBuilder().addUngradedModule("CS1010").build()));
+    }
+
+    @Test
+    public void test_moduleDoesNotContainKeyword_returnsFalse() {
+        ModuleContainsKeywordsPredicate predicate = new ModuleContainsKeywordsPredicate("CS9999");
+        assertFalse(predicate.test(new PersonBuilder().addUngradedModule("CS2030").build()));
+    }
+
+    @Test
+    public void toStringMethod() {
+        String keyword = "CS1010";
+        ModuleContainsKeywordsPredicate predicate = new ModuleContainsKeywordsPredicate(keyword);
+
+        String expected = ModuleContainsKeywordsPredicate.class.getCanonicalName() + "{keywords=" + keyword + "}";
+        assertEquals(expected, predicate.toString());
+    }
+}