How to execute JUnit TestSuite with some delay between each TestCase?

I have two JUnit4 Test classes say MyTest1, MyTest2 each having a couple of test methods. Actually these are Selenium JUnit TestCases.

In MyTest1.someMethodInsertingDate() i will insert some data into DB and it will take some time to process.

In MyTest2.validateProcessedData() I need to verify that the processed data inserted in the first test method is valid or not.

I know coupling between test methods/cases is not a good practice. But I am writing SeleniumTests to automate User Actions on UI, so I have to do this.

I am executing these two TestCases using MyTestSuite with @RunWith & @SuiteClasses.

Now How can I tell JUnit to execute MyTest2 TestCase with some delay,say 1 minute.