diff --git a/src/test/java/teammates/sqlui/webapi/FeedbackSessionOpeningRemindersActionTest.java b/src/test/java/teammates/sqlui/webapi/FeedbackSessionOpeningRemindersActionTest.java
new file mode 100644
index 00000000000..444d42689ed
--- /dev/null
+++ b/src/test/java/teammates/sqlui/webapi/FeedbackSessionOpeningRemindersActionTest.java
@@ -0,0 +1,114 @@
+package teammates.sqlui.webapi;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.List;
+
+import org.mockito.Mockito;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+import teammates.common.util.Const;
+import teammates.common.util.EmailWrapper;
+import teammates.storage.sqlentity.FeedbackSession;
+import teammates.ui.output.MessageOutput;
+import teammates.ui.webapi.FeedbackSessionOpeningRemindersAction;
+
+/**
+ * SUT: {@link FeedbackSessionOpeningRemindersAction}.
+ */
+public class FeedbackSessionOpeningRemindersActionTest extends BaseActionTest<FeedbackSessionOpeningRemindersAction> {
+
+    private FeedbackSession mockSession;
+    private FeedbackSession mockSession2;
+
+    @Override
+    protected String getActionUri() {
+        return Const.CronJobURIs.AUTOMATED_FEEDBACK_OPENING_REMINDERS;
+    }
+
+    @Override
+    protected String getRequestMethod() {
+        return GET;
+    }
+
+    @BeforeMethod
+    public void setUp() {
+        Mockito.reset(mockLogic, mockSqlEmailGenerator);
+
+        mockSession = mock(FeedbackSession.class);
+        mockSession2 = mock(FeedbackSession.class);
+        EmailWrapper mockEmail = mock(EmailWrapper.class);
+        EmailWrapper mockEmail2 = mock(EmailWrapper.class);
+
+        when(mockSqlEmailGenerator.generateFeedbackSessionOpeningEmails(mockSession)).thenReturn(List.of(mockEmail));
+        when(mockSqlEmailGenerator.generateFeedbackSessionOpeningEmails(mockSession2)).thenReturn(List.of(mockEmail2));
+    }
+
+    @Test
+    void testExecute_allSessionsOpening_emailsSent() {
+        when(mockLogic.getFeedbackSessionsWhichNeedOpenEmailsToBeSent()).thenReturn(List.of(mockSession, mockSession2));
+
+        FeedbackSessionOpeningRemindersAction action = getAction();
+        MessageOutput actionOutput = (MessageOutput) getJsonResult(action).getOutput();
+
+        verifySpecifiedTasksAdded(Const.TaskQueue.SEND_EMAIL_QUEUE_NAME, 2);
+        verify(mockSession, times(1)).setOpenEmailSent(true);
+        verify(mockSession2, times(1)).setOpenEmailSent(true);
+        assertEquals("Successful", actionOutput.getMessage());
+    }
+
+    @Test
+    void testExecute_oneSessionOpening_emailsSent() {
+        when(mockLogic.getFeedbackSessionsWhichNeedOpenEmailsToBeSent()).thenReturn(List.of(mockSession));
+
+        FeedbackSessionOpeningRemindersAction action = getAction();
+        MessageOutput actionOutput = (MessageOutput) getJsonResult(action).getOutput();
+
+        verifySpecifiedTasksAdded(Const.TaskQueue.SEND_EMAIL_QUEUE_NAME, 1);
+        verify(mockSession, times(1)).setOpenEmailSent(true);
+        verify(mockSession2, never()).setOpenEmailSent(true);
+        assertEquals("Successful", actionOutput.getMessage());
+    }
+
+    @Test
+    void testExecute_noSessionsOpening_noEmailsSent() {
+        when(mockLogic.getFeedbackSessionsWhichNeedOpenEmailsToBeSent()).thenReturn(List.of());
+
+        FeedbackSessionOpeningRemindersAction action = getAction();
+        MessageOutput actionOutput = (MessageOutput) getJsonResult(action).getOutput();
+
+        verifyNoTasksAdded();
+        verify(mockSession, never()).setOpenEmailSent(true);
+        verify(mockSession2, never()).setOpenEmailSent(true);
+        assertEquals("Successful", actionOutput.getMessage());
+    }
+
+    @Test
+    void testSpecificAccessControl_admin_canAccess() {
+        loginAsAdmin();
+        verifyCanAccess();
+    }
+
+    @Test
+    void testSpecificAccessControl_instructor_cannotAccess() {
+        loginAsInstructor("instructor-googleId");
+        verifyCannotAccess();
+    }
+
+    @Test
+    void testSpecificAccessControl_student_cannotAccess() {
+        loginAsStudent("student-googleId");
+        verifyCannotAccess();
+    }
+
+    @Test
+    void testSpecificAccessControl_loggedOut_cannotAccess() {
+        logoutUser();
+        verifyCannotAccess();
+    }
+}