How can I override properties for test-aggregate-no-fork?

I configured different version for main and test.

    <maven.compiler.source>8</maven.compiler.source>
    <maven.compiler.target>${maven.compiler.source}</maven.compiler.target>
    <maven.compiler.release>${maven.compiler.target}</maven.compiler.release>
    <maven.compiler.testSource>17</maven.compiler.testSource>
    <maven.compiler.testTarget>${maven.compiler.testSource}</maven.compiler.testTarget>
    <maven.compiler.testRelease>${maven.compiler.testTarget}</maven.compiler.testRelease>

When I do the site, the plugin complains.

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-site-plugin:4.0.0-M3:site (default-site) on project ...: Error generating maven-javadoc-plugin:3.4.1:test-aggregate-no-fork report: 
[ERROR] Exit code: 1 - Loading source files for package ...
[ERROR] Loading source files for package ...
[ERROR] Loading source files for package ...
[ERROR] /.../src/test/java/.../Some.java:16: warning: as of release 10, 'var' is a restricted type name and cannot be used for type declarations or as the element type of an array
[ERROR]         final var found = repositoryInstance().findAllBy...(' ', Pageable.unpaged());
[ERROR]                   ^

I tried with following execution and got no luck.

        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-javadoc-plugin</artifactId>
          <version>3.4.1</version>
          <configuration>
          </configuration>
          <executions>
            <execution>
              <id>default-test-aggregate-no-fork</id>
              <configuration>
                <source>${maven.compiler.testSource}</source>
              </configuration>
            </execution>
          </executions>
        </plugin>