--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.test/src/org/graalvm/compiler/test/SubprocessUtil.java	Tue Apr 24 08:13:30 2018 -0700
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.test/src/org/graalvm/compiler/test/SubprocessUtil.java	Tue Apr 24 09:04:57 2018 -0700
@@ -35,6 +35,7 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.graalvm.compiler.serviceprovider.GraalServices;
 import org.graalvm.util.CollectionsUtil;
 
 /**
@@ -236,7 +237,7 @@
         return new Subprocess(command, process.waitFor(), output);
     }
 
-    private static final boolean isJava8OrEarlier = System.getProperty("java.specification.version").compareTo("1.9") < 0;
+    private static final boolean isJava8OrEarlier = GraalServices.Java8OrEarlier;
 
     private static boolean hasArg(String optionName) {
         if (optionName.equals("-cp") || optionName.equals("-classpath")) {