diff --git a/hibernate-core/src/test/java/org/hibernate/test/jpa/naturalid/MutableNaturalIdTest.java b/hibernate-core/src/test/java/org/hibernate/test/jpa/naturalid/MutableNaturalIdTest.java
index 6fb4a3480e..02eab2c484 100644
--- a/hibernate-core/src/test/java/org/hibernate/test/jpa/naturalid/MutableNaturalIdTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/test/jpa/naturalid/MutableNaturalIdTest.java
@@ -27,13 +27,17 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
 import org.hibernate.Session;
+import org.hibernate.dialect.Oracle8iDialect;
 import org.hibernate.test.jpa.AbstractJPATest;
+import org.hibernate.testing.SkipForDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
 /**
  * @author Steve Ebersole
  */
+@SkipForDialect(value = Oracle8iDialect.class,
+		comment = "Oracle does not support identity key generation")
 public class MutableNaturalIdTest extends AbstractJPATest {
 	@Override
 	protected Class<?>[] getAnnotatedClasses() {
diff --git a/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/collection/DetachedMultipleCollectionChangeTest.java b/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/collection/DetachedMultipleCollectionChangeTest.java
index 2b7e1045d7..1c0e524d28 100644
--- a/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/collection/DetachedMultipleCollectionChangeTest.java
+++ b/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/collection/DetachedMultipleCollectionChangeTest.java
@@ -11,6 +11,7 @@ import javax.transaction.TransactionManager;
 
 import org.junit.Test;
 
+import org.hibernate.dialect.Oracle8iDialect;
 import org.hibernate.envers.RevisionType;
 import org.hibernate.envers.enhanced.SequenceIdRevisionEntity;
 import org.hibernate.envers.test.BaseEnversJPAFunctionalTestCase;
@@ -18,6 +19,7 @@ import org.hibernate.envers.test.Priority;
 import org.hibernate.envers.test.entities.collection.MultipleCollectionEntity;
 import org.hibernate.envers.test.entities.collection.MultipleCollectionRefEntity1;
 import org.hibernate.envers.test.entities.collection.MultipleCollectionRefEntity2;
+import org.hibernate.testing.SkipForDialect;
 import org.hibernate.testing.TestForIssue;
 import org.hibernate.testing.jta.TestingJtaBootstrap;
 import org.hibernate.testing.jta.TestingJtaPlatformImpl;
@@ -32,6 +34,8 @@ import static org.junit.Assert.assertNotNull;
  * @author Erik-Berndt Scheper
  */
 @TestForIssue(jiraKey = "HHH-6349")
+@SkipForDialect(value = Oracle8iDialect.class,
+		comment = "Oracle does not support identity key generation")
 public class DetachedMultipleCollectionChangeTest extends BaseEnversJPAFunctionalTestCase {
 	private TransactionManager tm = null;
 
diff --git a/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/modifiedflags/HasChangedDetachedMultipleCollection.java b/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/modifiedflags/HasChangedDetachedMultipleCollection.java
index 7be51fe5d3..05602fba00 100644
--- a/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/modifiedflags/HasChangedDetachedMultipleCollection.java
+++ b/hibernate-envers/src/test/java/org/hibernate/envers/test/integration/modifiedflags/HasChangedDetachedMultipleCollection.java
@@ -6,10 +6,12 @@ import javax.persistence.EntityManager;
 
 import org.junit.Test;
 
+import org.hibernate.dialect.Oracle8iDialect;
 import org.hibernate.envers.test.Priority;
 import org.hibernate.envers.test.entities.collection.MultipleCollectionEntity;
 import org.hibernate.envers.test.entities.collection.MultipleCollectionRefEntity1;
 import org.hibernate.envers.test.entities.collection.MultipleCollectionRefEntity2;
+import org.hibernate.testing.SkipForDialect;
 import org.hibernate.testing.TestForIssue;
 
 import static org.junit.Assert.assertEquals;
@@ -20,6 +22,8 @@ import static org.hibernate.envers.test.tools.TestTools.makeList;
  * @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
  */
 @TestForIssue(jiraKey = "HHH-7437")
+@SkipForDialect(value = Oracle8iDialect.class,
+		comment = "Oracle does not support identity key generation")
 public class HasChangedDetachedMultipleCollection extends AbstractModifiedFlagsEntityTest {
 	private Long mce1Id = null;
 	private Long mce2Id = null;