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diff --git a/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/support/undoRedoSupport/UndoTest20.java b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/support/undoRedoSupport/UndoTest20.java
new file mode 100644
index 000000000..f22521907
--- /dev/null
+++ b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/support/undoRedoSupport/UndoTest20.java
@@ -0,0 +1,124 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.tests.api.support.undoRedoSupport;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.simantics.databoard.Bindings;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Session;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.ReadRequest;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.service.UndoRedoSupport;
+import org.simantics.db.testing.base.ExistingDatabaseTest;
+import org.simantics.layer0.Layer0;
+import org.simantics.utils.DataContainer;
+
+/**
+ * Tests undo of deletion of large literal when done twice in sequence.
+ * This was added because of Bug #4591.
+ */
+public class UndoTest20 extends ExistingDatabaseTest {
+    private void initValue(byte[] value) {
+        for (int i=0; i<value.length; ++i)
+            value[i] = (byte)i;
+    }
+
+    @Test
+    public void testUndo20() throws Exception {
+        Session session = getSession();
+        final byte[] value = new byte[100000];
+        initValue(value);
+        final DataContainer<Resource> subject1 = new DataContainer<Resource>();
+        try {
+            session.syncRequest(new WriteRequest() {
+                @Override
+                public void perform(WriteGraph graph) throws DatabaseException {
+                    graph.markUndoPoint();
+                    Layer0 b = Layer0.getInstance(graph);
+                    Resource s1 = graph.newResource();
+                    graph.claim(s1, b.InstanceOf, b.Entity);
+                    graph.claimValue(s1, value);
+                    subject1.set(s1);
+                }
+            });
+        } catch (Throwable e) {
+            fail("Write transaction threw an unknown exception ", e);
+        }
+        testUndo(session, value, subject1);
+        testUndo(session, value, subject1);
+    }
+    public void testUndo(final Session session, final byte[] value, final DataContainer<Resource> subject1)
+    throws Exception {
+        final UndoRedoSupport support = session.getService(UndoRedoSupport.class);
+        try {
+            session.syncRequest(new ReadRequest() {
+                @Override
+                public void run(ReadGraph graph) throws DatabaseException {
+                    Resource s1 = subject1.get();
+                    byte[] t1 = graph.getValue(s1, Bindings.BYTE_ARRAY);
+                    if (!Arrays.equals(t1, value))
+                        fail("Failed to verify value.");
+                }
+            });
+        } catch (Throwable e) {
+            fail("Read transaction threw an unexpected exception ", e);
+        }
+        try {
+            session.syncRequest(new WriteRequest() {
+                @Override
+                public void perform(WriteGraph graph) throws DatabaseException {
+                    graph.markUndoPoint();
+                    Resource s1 = subject1.get();
+                    graph.denyValue(s1);
+                }
+            });
+        } catch (Throwable e) {
+            fail("Write transaction threw an unknown exception ", e);
+        }
+        try {
+            session.syncRequest(new ReadRequest() {
+                @Override
+                public void run(ReadGraph graph) throws DatabaseException {
+                    Resource s1 = subject1.get();
+                    byte[] t1 = graph.getPossibleValue(s1, Bindings.BYTE_ARRAY);
+                    if (null != t1)
+                        fail("Failed to verify delettion of value.");
+                }
+            });
+        } catch (Throwable e) {
+            fail("Read transaction threw an unexpected exception ", e);
+        }
+        try {
+            support.undo(session, 1);
+        } catch (Throwable e) {
+            fail("Undo operation threw an unexpected exception.", e);
+        }
+        try {
+            session.syncRequest(new ReadRequest() {
+                @Override
+                public void run(ReadGraph graph) throws DatabaseException {
+                    Resource s1 = subject1.get();
+                    byte[] t1 = graph.getValue(s1, Bindings.BYTE_ARRAY);
+                    if (!Arrays.equals(t1, value))
+                        fail("Failed to verify value1.");
+                }
+            });
+        } catch (Throwable e) {
+            fail("Read transaction threw an unexpected exception ", e);
+        }
+    }
+}