Quando executo mvn verify aparece 0% coberto no relatório

O Meu pom.xml está assim:

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <properties>
        <maven.compiler.source>1.6</maven.compiler.source>
        <maven.compiler.target>1.6</maven.compiler.target>
    </properties>
    <modelVersion>4.0.0</modelVersion>
    <groupId>br.com.alura.maven</groupId>
    <artifactId>produtos</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>produtos</name>
    <url>http://alura.com.br</url>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.thoughtworks.xstream/xstream -->
        <dependency>
            <groupId>com.thoughtworks.xstream</groupId>
            <artifactId>xstream</artifactId>
            <version>1.4.8</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.3.7.Final</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-pmd-plugin</artifactId>
                <version>3.11.0</version>
                <executions>
                    <execution>
                        <phase>verify</phase>
                        <goals>
                            <goal>check</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                 <version>0.7.5.201505241946</version>
                 <executions>
                         <execution>
                             <goals>
                             <goal>prepare-agent</goal>
                             <goal>report</goal>
                             </goals>
                         </execution>
                 </executions>
            </plugin>

        </plugins>

    </build>


</project>

Minha classe de teste está assim:

package br.com.alura.maven;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

public class ProdutoTeste {

    @Test
    public void verificaPrecoComImposto() {

        Produto bala = new Produto("juquinha", 0.10);
        assertEquals(0.11, bala.getPrecoComImposto(), 0.0001);

    }


}

Minha classe produto está assim:

package br.com.alura.maven;

public class Produto{

    private final String nome;
    private final double preco;

    public Produto(String nome, double preco) {
        super();
        this.nome = nome;
        this.preco = preco;
    }

    public String getNome() {
        return nome;
    }

    public double getPreco() {
        return preco;
    }

    public double getPrecoComImposto() {
        return preco * 1.10;
    }



}

O que pode ser?