I have a JUnit test which does a basic check of the repository layer which deletes an entry from the db.

I am using @DatabaseSetup annotation to provide initial configuration and using @ExpectedDatabase to verify the contents of DB post the deletion.

Following is the code

    @Test
    @ExpectedDatabase(
            table = "OBJECT_ALIAS",
            value = "classpath:dbunit/data/object_alias_deleted_2115_ALIAS_5.xml")
    public void testDeleteObjectAlias() {
        ObjectAlias objectAlias = new ObjectAlias(2115, 5, "NewAlias");
        objectAliasRepository.deleteObjectAlias(objectAlias);
        //objectAliasRepository.findByPartyNo(5); //runs a select query on DB
    }

The above test fails but if I uncomment the commented line, the test passes.
I am using eclipseLink as a JPA provider.

What causes this behaviour?