--- old/test/hotspot/jtreg/gc/shenandoah/options/TestHeuristicsUnlock.java	2020-06-17 13:38:25.571994930 +0200
+++ new/test/hotspot/jtreg/gc/shenandoah/options/TestHeuristicsUnlock.java	2020-06-17 13:38:25.295987452 +0200
@@ -53,6 +53,7 @@
     private static void testWith(String h, Mode mode) throws Exception {
         {
             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                    "-Xmx128m",
                     "-XX:-UnlockDiagnosticVMOptions",
                     "-XX:-UnlockExperimentalVMOptions",
                     "-XX:+UseShenandoahGC",
@@ -73,6 +74,7 @@
 
         {
             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                    "-Xmx128m",
                     "-XX:+UnlockDiagnosticVMOptions",
                     "-XX:-UnlockExperimentalVMOptions",
                     "-XX:+UseShenandoahGC",
@@ -93,6 +95,7 @@
 
         {
             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                    "-Xmx128m",
                     "-XX:-UnlockDiagnosticVMOptions",
                     "-XX:+UnlockExperimentalVMOptions",
                     "-XX:+UseShenandoahGC",