Spring does not create instance of repository in test

I'm developing a Spring-Application for a project in my university. Now I'm trying to add some unit and integration tests. Recently I added "TestApplication.class" because Spring didn`t find the actual @SpringBootApplication class.So I got rid of the error:

Unable to find a @SpringBootConfiguration, you need to use @ContextConfiguration or @SpringBootTest(classes=...) with your test

"TestApplication.class" is very simple:

package test.java.de.ostfalia.seprojekt;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class TestApplication {
}

This is my projectsetup:

This is my test:

package test.java.de.ostfalia.seprojekt;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
import org.springframework.test.context.junit4.SpringRunner;

import main.java.de.ostfalia.seprojekt.database.models.Channel;
import main.java.de.ostfalia.seprojekt.database.models.UserRegistration;
import main.java.de.ostfalia.seprojekt.database.repositories.ChannelRepository;
import main.java.de.ostfalia.seprojekt.database.repositories.UserRegistrationRepository;

@RunWith(SpringRunner.class)
@DataJpaTest
public class SelfCreatedQueriesUnitTest {
    
    @Autowired
    private ChannelRepository chRepo;
    
    @Autowired
    private UserRegistrationRepository urRepo;
    
    @Autowired
    private TestEntityManager entityManager;
    
    @Test
    public void testQueries() {
        Channel channelToPersist = new Channel();
        channelToPersist.setId(0);
        channelToPersist.setName("testChannel");
        entityManager.persist(channelToPersist);
        UserRegistration userToPersist = new UserRegistration();
        userToPersist.setId(0);
        userToPersist.setUsername("testUser");
        userToPersist.setEmail("test@mustermail.de");
        entityManager.persist(userToPersist);
        
        assertThat(chRepo.findByName("testChannel").get().getName()).isEqualTo("testChannel");
        assertThat(urRepo.findById(0).get().getId()).isEqualTo(0);
        assertThat(urRepo.findByUsername("testUser").get().getUsername()).isEqualTo("testUser");
        assertTrue(false);
    }
}

And finally these are my repositories:

package main.java.de.ostfalia.seprojekt.database.repositories;

import java.util.Optional;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import main.java.de.ostfalia.seprojekt.database.models.Channel;

// Repository f�r alle Channel
@Repository
public interface ChannelRepository extends JpaRepository<Channel, Integer> {
    Optional<Channel> findByName(String name);
}

package main.java.de.ostfalia.seprojekt.database.repositories;

import java.util.List;
import java.util.Optional;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import main.java.de.ostfalia.seprojekt.database.models.UserRegistration;

// Repository f�r alle registrierten Benutzer
@Repository
public interface UserRegistrationRepository extends JpaRepository<UserRegistration, Integer> {
    Optional<UserRegistration> findByUsername(String userName);
    List<UserRegistration> findAllByOrderByIdAsc();
}

As i try to execute my test using "mvn clean install test" i'm getting this error:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'test.java.de.ostfalia.seprojekt.SelfCreatedQueriesUnitTest': Unsatisfied dependency expressed through field 'chRepo'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'main.java.de.ostfalia.seprojekt.database.repositories.ChannelRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1422) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:393) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:119) ~[spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) ~[spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:43) ~[spring-boot-test-autoconfigure-2.3.0.RELEASE.jar:2.3.0.RELEASE]
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244) ~[spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.13.jar:4.13]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) [junit-4.13.jar:4.13]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) [junit-4.13.jar:4.13]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) [junit-4.13.jar:4.13]
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) [junit-4.13.jar:4.13]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) [junit-4.13.jar:4.13]
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) [junit-4.13.jar:4.13]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413) [junit-4.13.jar:4.13]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.13.jar:4.13]
    at org.junit.runner.JUnitCore.run(JUnitCore.java:115) [junit-4.13.jar:4.13]
    at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:43) [junit-vintage-engine-5.6.2.jar:5.6.2]
    at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) ~[na:1.8.0_251]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_251]
    at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[na:1.8.0_251]
    at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[na:1.8.0_251]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_251]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[na:1.8.0_251]
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[na:1.8.0_251]
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[na:1.8.0_251]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_251]
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) ~[na:1.8.0_251]
    at org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:82) ~[junit-vintage-engine-5.6.2.jar:5.6.2]
    at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:73) ~[junit-vintage-engine-5.6.2.jar:5.6.2]
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220) ~[junit-platform-launcher-1.3.1.jar:1.3.1]
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188) ~[junit-platform-launcher-1.3.1.jar:1.3.1]
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202) ~[junit-platform-launcher-1.3.1.jar:1.3.1]
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181) ~[junit-platform-launcher-1.3.1.jar:1.3.1]
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128) ~[junit-platform-launcher-1.3.1.jar:1.3.1]
    at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:150) ~[surefire-junit-platform-2.22.2.jar:2.22.2]
    at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:124) ~[surefire-junit-platform-2.22.2.jar:2.22.2]
    at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384) ~[surefire-booter-2.22.2.jar:2.22.2]
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345) ~[surefire-booter-2.22.2.jar:2.22.2]
    at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126) ~[surefire-booter-2.22.2.jar:2.22.2]
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418) ~[surefire-booter-2.22.2.jar:2.22.2]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'main.java.de.ostfalia.seprojekt.database.repositories.ChannelRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1716) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1272) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1226) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    ... 50 common frames omitted

My question is why this error occurs. I know that @DataJpaTest searches for entities and repositories. Do I have to instantiate them manually? I`m hoping to get sn answer soon. Thank you for reading this question.