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diff --git a/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/readGraph/getSingleType/GetSingleTypeTest1.java b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/readGraph/getSingleType/GetSingleTypeTest1.java
new file mode 100644
index 000000000..403c8bfff
--- /dev/null
+++ b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/readGraph/getSingleType/GetSingleTypeTest1.java
@@ -0,0 +1,52 @@
+/*******************************************************************************
+ * 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.readGraph.getSingleType;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.exception.NoSingleResultException;
+import org.simantics.db.testing.base.WriteReadTest;
+
+public class GetSingleTypeTest1 extends WriteReadTest {
+
+    private Resource type1;
+    private Resource type2;
+    private Resource instance1;
+    
+    @Override
+    protected void write(WriteGraph graph) throws DatabaseException {
+        type1 = graph.newResource();
+        graph.claim(type1, L0.Inherits, L0.Entity);
+
+        type2 = graph.newResource();
+        graph.claim(type2, L0.Inherits, L0.Entity);
+  
+        instance1 = graph.newResource();
+        graph.claim(instance1, L0.InstanceOf,type1);
+        graph.claim(instance1, L0.InstanceOf,type2);
+ 
+    }
+    
+    @Override
+    protected void read(ReadGraph graph) throws DatabaseException {
+    	try {
+    		assertNotNull("Null not allowed",graph.getSingleType(instance1));  
+    	} catch (NoSingleResultException e) {
+    		return;
+    	} catch (Throwable t) {
+    		fail("Wrong exception");
+    	}
+    	fail("Should throw");
+    }
+}