diff --git a/test/072-reachability-fence/src/Main.java b/test/072-reachability-fence/src/Main.java
new file mode 100644
index 0000000..ac1e131
--- /dev/null
+++ b/test/072-reachability-fence/src/Main.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.lang.ref.Reference;
+import java.lang.ref.WeakReference;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Starting");
+        WeakReference wrefs[] = new WeakReference[5];
+        String str0 = generateString("String", 0);
+        String str1 = generateString("String", 1);
+        String str2 = generateString("String", 2);
+        String str3 = generateString("String", 3);
+        String str4 = generateString("String", 4);
+        wrefs[0] = new WeakReference(str0);
+        wrefs[1] = new WeakReference(str1);
+        wrefs[2] = new WeakReference(str2);
+        wrefs[3] = new WeakReference(str3);
+        wrefs[4] = new WeakReference(str4);
+        // Clear a couple as a sanity check.
+        str1 = null;
+        str2 = null;
+        // str<n> dead here; in the future we will possibly reuse the registers.
+        // Give the compiler something to fill the registers with.
+        String str5 = generateString("String", 5);
+        String str6 = generateString("String", 6);
+        String str7 = generateString("String", 7);
+        String str8 = generateString("String", 8);
+        String str9 = generateString("String", 9);
+        Runtime.getRuntime().gc();
+        for (int i = 0; i < 5; ++i) {
+          if (wrefs[i].get() != null) {
+            System.out.println("Reference " + i + " was live.");
+          }
+        }
+        Reference.reachabilityFence(str0);
+        Reference.reachabilityFence(str1);
+        Reference.reachabilityFence(str2);
+        Reference.reachabilityFence(str3);
+        Reference.reachabilityFence(str4);
+        System.out.println("Finished");
+    }
+
+    private static String generateString(String base, int num) {
+        return base + num;
+    }
+}