Error with compileTestJava task: Cannot find sources from src folder

[d-eder]

Description

I'm currently setting up a java project with the autoconfigure-gradle-plugin.
When building the application, the gradle task compileTestJava complains because it cannot find a class which is used in the test.

When I remove the autoconfigure-gradle-plugin, everything is working as expected

Error message

...\src\test\java\anytestpackage\DummyTest.java:4: error: package anypackage does not exist
import anypackage.DummyService;
                 ^

Code

Test

in Folder server-app/src/test/java/anytestpackage

package anytestpackage;
import org.junit.jupiter.api.Test;
import anypackage.DummyService;
public class DummyTest {
    @Test
    void test(){
        var x = DummyService.class;
    }
}

Service

in Folder server-app/src/main/java/anypackage

package anypackage;
import org.springframework.stereotype.Service;
@Service
public class DummyService {
    public void test(){
        throw new RuntimeException("x");
    }
}

build.gradle.kts

plugins {
    java
    `java-test-fixtures`
    id("io.cloudflight.autoconfigure-gradle") version "1.1.1"
}

group = "at.test"
version = "0.0.1-SNAPSHOT"

autoConfigure {
    java {
        languageVersion.set(JavaLanguageVersion.of(21))
    }
}

allprojects {
    repositories {
        mavenCentral()
    }
}

subprojects {
    apply(plugin = "java")
    apply(plugin = "java-test-fixtures")

    configurations {
        compileOnly {
            extendsFrom(configurations.annotationProcessor.get())
        }
    }

    dependencies {
        implementation(platform("io.cloudflight.platform.spring:platform-spring-bom:2.4.2"))
        annotationProcessor(platform("io.cloudflight.platform.spring:platform-spring-bom:2.4.2"))
        testImplementation(platform("io.cloudflight.platform.spring:platform-spring-test-bom:2.4.2"))
        testFixturesImplementation(platform("io.cloudflight.platform.spring:platform-spring-test-bom:2.4.2"))

        implementation("org.springframework.boot:spring-boot-starter")
        compileOnly("org.projectlombok:lombok")
        annotationProcessor("org.projectlombok:lombok")

        testImplementation("org.springframework.boot:spring-boot-starter-test")
        testFixturesImplementation("org.springframework.boot:spring-boot-starter-test")
        testRuntimeOnly("org.junit.platform:junit-platform-launcher")
    }

    tasks.test {
        useJUnitPlatform()
    }
}

Environment

• Java 21
• Gradle 8.10.1