assertTrue(md.isProjectRequired(), "Expected " + md + ".isProjectRequired() to return true");
        assertFalse(md.isThreadSafe(), "Expected " + md + ".isThreadSafe() to return false");
        assertEquals("package", md.getPhase());
        assertEquals("org.apache.maven.plugin.jar.JarMojo", md.getImplementation());

        for (ExecutionPlanItem executionPlanItem : planItem) {
            final MojoExecution mojoExecution = executionPlanItem.getMojoExecution();
            if (!mojoExecution.getMojoDescriptor().isThreadSafe()) {
                plugins.add(mojoExecution.getPlugin());
            }
        }
        return plugins;
    }

    /**
     * Get set of mojos used but not marked @threadSafe
     *