diff -r bf414874c28f test/hotspot/jtreg/vmTestbase/ExecDriver.java
--- a/test/hotspot/jtreg/vmTestbase/ExecDriver.java	Mon Jun 18 09:48:22 2018 -0700
+++ b/test/hotspot/jtreg/vmTestbase/ExecDriver.java	Mon Jun 18 21:25:17 2018 +0200
@@ -101,23 +101,25 @@
         ProcessBuilder pb = new ProcessBuilder(args);
         // adding jvm.so to library path
         if (launcher) {
-            Path dir = Paths.get(Utils.TEST_JDK);
+            Path testJdkDir = Paths.get(Utils.TEST_JDK);
             String name;
             if (Platform.isWindows()) {
-                dir = dir.resolve("bin")
-                         .resolve(variant())
-                         .toAbsolutePath();
+                Path binDir = testJdkDir.resolve("bin").toAbsolutePath();
+                Path variantDir = binDir.resolve(variant()).toAbsolutePath();
                 name = "PATH";
+                pb.environment().merge(name,
+                        variantDir + File.pathSeparator + binDir,
+                        (x, y) -> y + File.pathSeparator + x);
             } else {
-                dir = dir.resolve("lib")
+                Path libDir = testJdkDir.resolve("lib")
                          .resolve(variant())
                          .toAbsolutePath();
                 name = Platform.isOSX() ? "DYLD_LIBRARY_PATH" : "LD_LIBRARY_PATH";
+                pb.environment().merge(name, libDir.toString(),
+                        (x, y) -> y + File.pathSeparator + x);
             }
 
-            System.out.println("  with " + name + " = " +
-                    pb.environment()
-                      .merge(name, dir.toString(), (x, y) -> y + File.pathSeparator + x));
+            System.out.println("  with " + name + " = " + pb.environment());
             System.out.println("  with CLASSPATH = " +
                     pb.environment()
                       .put("CLASSPATH", Utils.TEST_CLASS_PATH));