Maven/TestNG reports "Failures: 0" but then "There are test failures.", what's wrong?

I'm using Maven 2.2.1 r801777, Surefire 2.7.1, TestNG 5.14.6, Java 1.6.0_11 on Win XP.

I have only one test class with one empty test method and in my pom I have just added TestNG dependency. When I execute mvn test it prints out:

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running TestSuite
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.301 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] There are test failures.

Please refer to [...]\target\surefire-reports for the individual test results.

There is no error in test reports and with -e switch:

[INFO] Trace
org.apache.maven.BuildFailureException: There are test failures.

Please refer to [...]\target\surefire-reports for the individual test results.
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:715)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
        at org.apac开发者_Go百科he.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoFailureException: There are test failures.

Please refer to [...]\target\surefire-reports for the individual test results.
        at org.apache.maven.plugin.surefire.SurefirePlugin.execute(SurefirePlugin.java:575)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
        ... 17 more

Any idea?

EDIT

My pom:

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.sample</groupId>
    <artifactId>sample</artifactId>
    <name>sample</name>
    <packaging>jar</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <description />

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>5.14.6</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

The only class that I have:

import org.testng.Assert;
import org.testng.annotations.Test;
@Test
public class MyTest {
    @Test
    public void test() {
        Assert.assertEquals("a", "a");
    }
}

Just created simple example project with your pom file (Fixed some parts) and put it on github ...tested with Maven 2.2.1 and Maven 3.0.2 works perfect. The cause of the problem must be somewhere else...

Please specify the surefire plugin version (2.4.1 if you face the same issue) as follows and also specify the forkmode and useManifestOnlyJar values

    <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.5</version>
            <configuration>
                <forkMode>none</forkMode><!-- 'none' is so we can debug -->
                <argLine>-enableassertions</argLine>
                <!--
                <useManifestOnlyJar>false</useManifestOnlyJar>
                <useSystemClassLoader>true</useSystemClassLoader>
                -->
                <suiteXmlFiles>
                    <suiteXmlFile>
                        ${basedir}/src/main/resources/testng-none.xml
                    </suiteXmlFile>
                </suiteXmlFiles>

            </configuration>

        </plugin>