diff --git a/hibernate-core/src/test/java/org/hibernate/jpa/test/query/QueryTest.java b/hibernate-core/src/test/java/org/hibernate/jpa/test/query/QueryTest.java
index be8fdcb441..2855702709 100644
--- a/hibernate-core/src/test/java/org/hibernate/jpa/test/query/QueryTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/jpa/test/query/QueryTest.java
@@ -27,6 +27,7 @@ import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.dialect.Oracle8iDialect;
 import org.hibernate.dialect.PostgreSQL9Dialect;
 import org.hibernate.dialect.PostgresPlusDialect;
+import org.hibernate.dialect.SybaseDialect;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
 import org.hibernate.jpa.test.Distributor;
@@ -131,6 +132,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	}
 
 	@Test
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNullPositionalParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -160,6 +162,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	}
 
 	@Test
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNullPositionalParameterParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -206,6 +209,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	}
 
 	@Test
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNullPositionalParameterParameterIncompatible() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -252,6 +256,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	}
 
 	@Test
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNullNamedParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -281,6 +286,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	}
 
 	@Test
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNullNamedParameterParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -326,6 +332,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	}
 
 	@Test
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNullNamedParameterParameterIncompatible() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -374,6 +381,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	@SkipForDialect(value = Oracle8iDialect.class, jiraKey = "HHH-10161", comment = "Cannot convert untyped null (assumed to be BINARY type) to NUMBER")
 	@SkipForDialect(value = PostgreSQL9Dialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = PostgresPlusDialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNativeQueryNullPositionalParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -409,6 +417,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	@SkipForDialect(value = PostgreSQL9Dialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = PostgresPlusDialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = Oracle8iDialect.class, comment = "ORA-00932: inconsistent datatypes: expected NUMBER got BINARY")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNativeQueryNullPositionalParameterParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -460,6 +469,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	@SkipForDialect(value = Oracle8iDialect.class, jiraKey = "HHH-10161", comment = "Cannot convert untyped null (assumed to be BINARY type) to NUMBER")
 	@SkipForDialect(value = PostgreSQL9Dialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = PostgresPlusDialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNativeQueryNullNamedParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
@@ -495,6 +505,7 @@ public class QueryTest extends BaseEntityManagerFunctionalTestCase {
 	@SkipForDialect(value = PostgreSQL9Dialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = PostgresPlusDialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = Oracle8iDialect.class, comment = "ORA-00932: inconsistent datatypes: expected NUMBER got BINARY")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNativeQueryNullNamedParameterParameter() throws Exception {
 		EntityManager em = getOrCreateEntityManager();
 		em.getTransaction().begin();
diff --git a/hibernate-core/src/test/java/org/hibernate/test/annotations/query/QueryAndSQLTest.java b/hibernate-core/src/test/java/org/hibernate/test/annotations/query/QueryAndSQLTest.java
index f597278387..621eb48d5e 100644
--- a/hibernate-core/src/test/java/org/hibernate/test/annotations/query/QueryAndSQLTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/test/annotations/query/QueryAndSQLTest.java
@@ -27,6 +27,7 @@ import org.hibernate.dialect.PostgreSQL81Dialect;
 import org.hibernate.dialect.PostgreSQL9Dialect;
 import org.hibernate.dialect.PostgreSQLDialect;
 import org.hibernate.dialect.PostgresPlusDialect;
+import org.hibernate.dialect.SybaseDialect;
 import org.hibernate.dialect.function.SQLFunction;
 import org.hibernate.stat.Statistics;
 import org.hibernate.type.StandardBasicTypes;
@@ -109,6 +110,7 @@ public class QueryAndSQLTest extends BaseCoreFunctionalTestCase {
 	@SkipForDialect(value = Oracle8iDialect.class, jiraKey = "HHH-10161", comment = "Cannot convert untyped null (assumed to be BINARY type) to NUMBER")
 	@SkipForDialect(value = PostgreSQL9Dialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = PostgresPlusDialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testQueryWithNullParameter(){
 		Chaos c0 = new Chaos();
 		c0.setId( 0L );
@@ -149,6 +151,7 @@ public class QueryAndSQLTest extends BaseCoreFunctionalTestCase {
 
 	@Test
 	@TestForIssue( jiraKey = "HHH-10161")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testQueryWithNullParameterTyped(){
 		Chaos c0 = new Chaos();
 		c0.setId( 0L );
@@ -192,6 +195,7 @@ public class QueryAndSQLTest extends BaseCoreFunctionalTestCase {
 	@SkipForDialect(value = Oracle8iDialect.class, jiraKey = "HHH-10161", comment = "Cannot convert untyped null (assumed to be BINARY type) to NUMBER")
 	@SkipForDialect(value = PostgreSQL9Dialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
 	@SkipForDialect(value = PostgresPlusDialect.class, jiraKey = "HHH-10312", comment = "Cannot convert untyped null (assumed to be bytea type) to bigint")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNativeQueryWithNullParameter(){
 		Chaos c0 = new Chaos();
 		c0.setId( 0L );
@@ -232,6 +236,7 @@ public class QueryAndSQLTest extends BaseCoreFunctionalTestCase {
 
 	@Test
 	@TestForIssue( jiraKey = "HHH-10161")
+	@SkipForDialect(value = SybaseDialect.class, comment = "Null == null on Sybase")
 	public void testNativeQueryWithNullParameterTyped(){
 		Chaos c0 = new Chaos();
 		c0.setId( 0L );