--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/FrameTest.java	Tue Sep 29 18:04:11 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/FrameTest.java	Wed Sep 30 10:59:40 2015 +0200
@@ -27,13 +27,17 @@
 import com.oracle.truffle.api.TruffleRuntime;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.FrameDescriptor;
+import com.oracle.truffle.api.frame.FrameInstance;
 import com.oracle.truffle.api.frame.FrameSlot;
 import com.oracle.truffle.api.frame.FrameSlotKind;
 import com.oracle.truffle.api.frame.FrameSlotTypeException;
+import com.oracle.truffle.api.frame.MaterializedFrame;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.api.nodes.RootNode;
 import org.junit.Assert;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 import org.junit.Test;
 
 /**
@@ -152,4 +156,31 @@
             }
         }
     }
+
+    @Test
+    public void framesCanBeMaterialized() {
+        final TruffleRuntime runtime = Truffle.getRuntime();
+
+        class FrameRootNode extends RootNode {
+
+            public FrameRootNode() {
+                super(TestingLanguage.class, null, null);
+            }
+
+            @Override
+            public Object execute(VirtualFrame frame) {
+                FrameInstance frameInstance = runtime.getCurrentFrame();
+                Frame readWrite = frameInstance.getFrame(FrameInstance.FrameAccess.READ_WRITE, true);
+                Frame materialized = frameInstance.getFrame(FrameInstance.FrameAccess.MATERIALIZE, true);
+
+                assertTrue("Really materilized: " + materialized, materialized instanceof MaterializedFrame);
+                assertEquals("It's my frame", frame, readWrite);
+                return this;
+            }
+        }
+
+        FrameRootNode frn = new FrameRootNode();
+        Object ret = Truffle.getRuntime().createCallTarget(frn).call();
+        assertEquals("Returns itself", frn, ret);
+    }
 }