How to include integration tests via maven-surefire-plugin without using naming convention

My Java Maven project separates unit tests from integration tests in the directory structure:

• Unit tests under src/test/java;
• Integration tests src/integration-test/java.

src/integration-test/java is a non-default test source directory, so I added it manually to the project using build-helper-maven-plugin, as you can see:

    <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>build-helper-maven-plugin</artifactId>
        <version>3.0.0</version>
        <executions>
            <execution>
                <id>add-integration-test-sources</id>
                <phase>generate-test-sources</phase>
                <goals>
                    <goal>add-test-source</goal>
                </goals>
                <configuration>
                    <sources>
                        <source>src/integration-test/java</source>
                    </sources>
                </configuration>
            </execution>
            ...
        </executions>
    </plugin>

I also used maven-failsafe-plugin to include the test integration classes in the test execution flow, as shown below.

    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-failsafe-plugin</artifactId>
        <version>3.0.0-M4</version>
        <configuration>
            <includes>
                <include>**/*IntegrationTest.java</include>
            </includes>
        </configuration>
        <executions>
            <execution>
                <id>integration-tests</id>
                <goals>
                    <goal>integration-test</goal>
                    <goal>verify</goal>
                </goals>
                <configuration>
                    ...
                </configuration>
            </execution>
        </executions>
    </plugin>

This approach works, but obliges me to use a naming convention in the test classes. Precisely, only the ones ending with "IntegrationTest" will be executed.

I would like to configure the plugin based on a naming convention in the path and not in the file name. Precisely, I intend to allow all classes under src/integration-test/java regardless the file names. I did not succeed so far and every tutorial in the web only shows the approach I implemented and showed you above.

Does anyone have any suggestion on how to do that?

Thanks