Gradleの-Dオプションの値がJavaプログラムで取得できない

System.getPropertyで値を取得できないです

環境

Java 1.8
Gradle 2.14

コマンド

gradle test -Denv=test

ソース

Sample.java

import static org.junit.Assert.assertEquals;
import org.junit.Test;


public class Sample {

    @Test
    public void testHoge() {
        String hoge = System.getProperty("env");
        assertEquals("test", hoge);
    }

}

builde.gradle

apply plugin: 'java'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    testCompile 'junit:junit:4.12'
}

結果

Sample > testHoge FAILED
java.lang.AssertionError: expected:<test> but was:<null>
    at org.junit.Assert.fail(Assert.java:88)
    at org.junit.Assert.failNotEquals(Assert.java:834)
    at org.junit.Assert.assertEquals(Assert.java:118)
    at org.junit.Assert.assertEquals(Assert.java:144)
    at Sample.testHoge(Sample.java:13)

1 test completed, 1 failed