SpringBootTest failing - Why in single application test schema.sql and data.sql is executed twice?

Hi I am writing a SpringBoot application, where I am writing unit as well as integration tests, but my integration tests are failing?

Reason 1: It tries to create a table by executing schema.sql twice and hence table already exists exception is thrown and the test fails.

Reason 2: Even if I put create if not exists, it fails on insertions by executing the data.sql as it tries to execute the script 2nd time and a uniqueness constraint violation occurs. I know I can drop tables or delete records at the start to get rid of errors.

But why it's running twice? not thrice or once?

First test

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
public class Atest {

}

Second test

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
public class Btest {

}

Third test

@SpringBootTest
public class Ctest {

}

Atest and Btest both passes and they try to access a record from test data and they are able to see it. but Ctest fails due to exception

Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "tbl_test" already exists; SQL statement:

as there are 2 files in test->resourece folder data.sql and schema.sql. it tries to run them twice

My Questions:

1. Why Scripts are executed twice?
2. Why not thrice, once for each test?
3. I can see the only difference among them is @SpringBootTest vs @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE) but still they are in one execution cycle or context and hence it should not happen.
4. Why it does not fail when multiple tests have @SpringBootTest (like if all three has this annotaion).