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diff --git a/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/write/deny/DenyTest1.java b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/write/deny/DenyTest1.java
new file mode 100644
index 000000000..62acb0787
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+++ b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/write/deny/DenyTest1.java
@@ -0,0 +1,74 @@
+/*******************************************************************************
+ * 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.write.deny;
+
+import java.util.UUID;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.VirtualGraph;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.common.request.WriteResultRequest;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.service.VirtualGraphSupport;
+import org.simantics.db.testing.base.WriteReadTest;
+
+public class DenyTest1 extends WriteReadTest {
+	
+	Resource other;
+	
+	@Override
+	protected void write(WriteGraph graph) throws DatabaseException {
+		
+		VirtualGraphSupport support = graph.getService(VirtualGraphSupport.class);
+		VirtualGraph virt = support.getMemoryPersistent(UUID.randomUUID().toString());
+
+		final Resource other2 = graph.syncRequest(new WriteResultRequest<Resource>(virt) {
+
+			@Override
+			public Resource perform(WriteGraph graph) throws DatabaseException {
+				Resource other = graph.newResource();
+				graph.claim(written, L0.ConsistsOf, L0.PartOf, other);
+				return other;
+			}
+			
+		});
+
+		Resource single = graph.getSingleObject(written, L0.ConsistsOf);
+		assertNotNull(single);
+		assertTrue(single.equals(other2));
+		
+		other = graph.newResource();
+		graph.claim(written, L0.ConsistsOf, L0.PartOf, other);
+
+		graph.syncRequest(new WriteRequest() {
+
+			@Override
+			public void perform(WriteGraph graph) throws DatabaseException {
+				graph.deny(written, L0.ConsistsOf, L0.PartOf, other2);
+			}
+			
+		});
+		
+	}
+	
+	@Override
+	protected void read(ReadGraph graph) throws DatabaseException {
+		
+		Resource single = graph.getPossibleObject(written, L0.ConsistsOf);
+		assertNotNull(single);
+		assertTrue(single.equals(other));
+		
+	}
+	
+}
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