Tests running twice when using cobertura and maven site plugin

I am using maven and cobertura site plugin together to run unit tests and generate a report. Everything works fine, but the only problem is that all unit tests are running twice.

I tried to install forkMode

both never

for maven-site-plugin

, but even then I ran into the same problem.

Any help would be appreciated.

My team: mvn cobertura:cobertura -Dcobertura.report.format=html

My pom:

<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>cobertura-maven-plugin</artifactId>
                <configuration>
                    <aggregate>true</aggregate>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>clean</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-pmd-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <configuration>
                    <aggregate>false</aggregate>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>findbugs-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-site-plugin</artifactId>
            </plugin>
        </plugins>
    </pluginManagement>

    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>cobertura-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

<reporting>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>cobertura-maven-plugin</artifactId>
            <configuration>
                <formats>
                    <format>html</format>
                    <format>xml</format>
                </formats>
                <instrumentation>
                    <excludes>
                        <exclude>**/test/**/*.class</exclude>
                    </excludes>
                </instrumentation>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-pmd-plugin</artifactId>
            <version>3.0.1</version>
            <configuration>
                <targetJdk>1.6</targetJdk>
                <linkXref>true</linkXref>
                <sourceEncoding>ISO-8859-1</sourceEncoding>
                <format>xml</format>
                <aggregate>true</aggregate>
                <verbose>true</verbose>
                <rulesets>
                    <ruleset>favorites.xml</ruleset>
                </rulesets>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-javadoc-plugin</artifactId>
            <version>2.9.1</version>
            <configuration>
                <aggregate>true</aggregate>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>findbugs-maven-plugin</artifactId>
            <version>2.5.2</version>
            <configuration>
                <xmlOutput>true</xmlOutput>
            </configuration>
        </plugin>
    </plugins>
</reporting>