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diff --git a/plugins/org.eclipse.emf.compare.tests/src/org/eclipse/emf/compare/tests/unit/match/statistic/similarity/structuresimilarity/RelationsSimilarityDistinctTest.java b/plugins/org.eclipse.emf.compare.tests/src/org/eclipse/emf/compare/tests/unit/match/statistic/similarity/structuresimilarity/RelationsSimilarityDistinctTest.java
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+++ b/plugins/org.eclipse.emf.compare.tests/src/org/eclipse/emf/compare/tests/unit/match/statistic/similarity/structuresimilarity/RelationsSimilarityDistinctTest.java
@@ -0,0 +1,132 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2009 Obeo.
+ * 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:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.emf.compare.tests.unit.match.statistic.similarity.structuresimilarity;
+
+import java.io.File;
+import java.util.Iterator;
+
+import junit.framework.TestCase;
+
+import org.eclipse.core.runtime.FileLocator;
+import org.eclipse.emf.compare.FactoryException;
+import org.eclipse.emf.compare.match.internal.statistic.StructureSimilarity;
+import org.eclipse.emf.compare.match.statistic.MetamodelFilter;
+import org.eclipse.emf.compare.tests.EMFCompareTestPlugin;
+import org.eclipse.emf.compare.util.ModelUtils;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
+
+/**
+ * Tests the behavior of
+ * {@link StructureSimilarity#relationsSimilarityMetric(EObject, EObject, MetamodelFilter)} with objects known
+ * to be distinct.
+ * 
+ * @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
+ */
+@SuppressWarnings("nls")
+public class RelationsSimilarityDistinctTest extends TestCase {
+	/** Similarities higher than this threshold will be considered too high for distinct objects. */
+	private static final double HIGH_FILTERED_SIMILARITY_THRESHOLD = 0.4d;
+
+	/**
+	 * Defines a higher threshold for relations similarity when computing without filtering unused (thus
+	 * identical) features.
+	 */
+	private static final double HIGH_UNFILTERED_SIMILARITY_THRESHOLD = 0.6d;
+
+	/** Full path to the model containing this test's input. */
+	private static final String INPUT_MODEL_PATH = "/data/testInput.ecore";
+
+	/** Message displayed when an unexpected {@link FactoryException} is raised. */
+	private static final String MESSAGE_FACTORY_UNEXPECTED = "Unexpected FactoryException has been thrown by relationsSimilarityMetrics.";
+
+	/** Filter that will be used to detect the relevant features of an {@link EObject}. */
+	private MetamodelFilter filter;
+
+	/** Reference to the package named "structureSimilarityTests". See model located at INPUT_MODEL_PATH. */
+	private EObject inputPackage;
+
+	/**
+	 * Tests behavior of
+	 * {@link StructureSimilarity#relationsSimilarityMetric(EObject, EObject, MetamodelFilter)} with
+	 * filtering. Input EObjects are the contents of the packages &quot;similar&quot; (first) and
+	 * &quot;totallydifferent&quot;.
+	 */
+	public void testFilteredRelationsSimilarityTotallyDifferentObjects() {
+		final EObject defaultPackage = inputPackage.eContents().get(0);
+		final EObject totallyDifferentPackage = inputPackage.eContents().get(2);
+
+		final Iterator<EObject> defaultIterator = defaultPackage.eAllContents();
+		while (defaultIterator.hasNext()) {
+			final EObject defaultObject = defaultIterator.next();
+			final Iterator<EObject> differentIterator = totallyDifferentPackage.eAllContents();
+			while (differentIterator.hasNext()) {
+				final EObject differentObject = differentIterator.next();
+				try {
+					final double similarity = StructureSimilarity.relationsSimilarityMetric(defaultObject,
+							differentObject, filter);
+					assertTrue(
+							"Relations similarity between two totally different objects shouldn't be this high.",
+							similarity < HIGH_FILTERED_SIMILARITY_THRESHOLD);
+				} catch (FactoryException e) {
+					fail(MESSAGE_FACTORY_UNEXPECTED);
+				}
+			}
+		}
+	}
+
+	/**
+	 * Tests behavior of
+	 * {@link StructureSimilarity#relationsSimilarityMetric(EObject, EObject, MetamodelFilter)} with no
+	 * filtering. Input EObjects are the contents of the packages &quot;similar&quot; (first) and
+	 * &quot;totallydifferent&quot;.
+	 */
+	public void testUnfilteredRelationsSimilarityTotallyDifferentObjects() {
+		final EObject defaultPackage = inputPackage.eContents().get(0);
+		final EObject totallyDifferentPackage = inputPackage.eContents().get(2);
+
+		final Iterator<EObject> defaultIterator = defaultPackage.eAllContents();
+		while (defaultIterator.hasNext()) {
+			final EObject defaultObject = defaultIterator.next();
+			final Iterator<EObject> differentIterator = totallyDifferentPackage.eAllContents();
+			while (differentIterator.hasNext()) {
+				final EObject differentObject = differentIterator.next();
+				try {
+					final double similarity = StructureSimilarity.relationsSimilarityMetric(defaultObject,
+							differentObject, null);
+					assertTrue(
+							"Relations similarity between two totally different objects shouldn't be this high.",
+							similarity < HIGH_UNFILTERED_SIMILARITY_THRESHOLD);
+				} catch (FactoryException e) {
+					fail(MESSAGE_FACTORY_UNEXPECTED);
+				}
+			}
+		}
+	}
+
+	/**
+	 * {@inheritDoc}
+	 * 
+	 * @see junit.framework.TestCase#setUp()
+	 */
+	@Override
+	protected void setUp() throws Exception {
+		final File modelFile = new File(FileLocator.toFileURL(
+				EMFCompareTestPlugin.getDefault().getBundle().getEntry(INPUT_MODEL_PATH)).getFile());
+		final EObject model = ModelUtils.load(modelFile, new ResourceSetImpl());
+		// index "7" points to the package "structureSimilarityTests" which contains
+		// input data for these tests. See model at location INPUT_MODEL_PATH.
+		final int packageIndex = 7;
+		inputPackage = model.eContents().get(packageIndex);
+		filter = new MetamodelFilter();
+		filter.analyseModel(model);
+	}
+}