diff --git a/hibernate-core/src/matrix/java/org/hibernate/test/legacy/FumTest.java b/hibernate-core/src/matrix/java/org/hibernate/test/legacy/FumTest.java
index cf97972283..6564419f34 100644
--- a/hibernate-core/src/matrix/java/org/hibernate/test/legacy/FumTest.java
+++ b/hibernate-core/src/matrix/java/org/hibernate/test/legacy/FumTest.java
@@ -36,7 +36,9 @@ import org.hibernate.dialect.HSQLDialect;
 import org.hibernate.dialect.MckoiDialect;
 import org.hibernate.dialect.MySQLDialect;
 import org.hibernate.dialect.PointbaseDialect;
+import org.hibernate.dialect.SybaseASE15Dialect;
 import org.hibernate.dialect.TimesTenDialect;
+import org.hibernate.testing.SkipForDialect;
 import org.hibernate.transform.Transformers;
 import org.hibernate.type.DateType;
 import org.hibernate.type.EntityType;
@@ -713,6 +715,7 @@ public class FumTest extends LegacyTestCase {
 	}
 
 	@Test
+    @SkipForDialect( value = SybaseASE15Dialect.class, jiraKey = "HHH-3690" )
 	public void testCompositeKeyPathExpressions() throws Exception {
 		Session s = openSession();
 		s.beginTransaction();
diff --git a/hibernate-core/src/matrix/java/org/hibernate/test/legacy/QueryByExampleTest.java b/hibernate-core/src/matrix/java/org/hibernate/test/legacy/QueryByExampleTest.java
index 91d5a47253..836b513033 100644
--- a/hibernate-core/src/matrix/java/org/hibernate/test/legacy/QueryByExampleTest.java
+++ b/hibernate-core/src/matrix/java/org/hibernate/test/legacy/QueryByExampleTest.java
@@ -31,6 +31,8 @@ import org.hibernate.Session;
 import org.hibernate.Transaction;
 import org.hibernate.criterion.Example;
 import org.hibernate.criterion.Restrictions;
+import org.hibernate.dialect.SybaseASE15Dialect;
+import org.hibernate.testing.SkipForDialect;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -67,6 +69,7 @@ public class QueryByExampleTest extends LegacyTestCase {
     }
 
 	@Test
+    @SkipForDialect( value = SybaseASE15Dialect.class, jiraKey = "HHH-4580")
     public void testJunctionNotExpressionQBE() throws Exception {
         deleteData();
         initData();
diff --git a/hibernate-testing/src/main/java/org/hibernate/testing/DialectChecks.java b/hibernate-testing/src/main/java/org/hibernate/testing/DialectChecks.java
index 562b917e35..cdb9b72f95 100644
--- a/hibernate-testing/src/main/java/org/hibernate/testing/DialectChecks.java
+++ b/hibernate-testing/src/main/java/org/hibernate/testing/DialectChecks.java
@@ -82,7 +82,7 @@ abstract public class DialectChecks {
 
 	public static class SupportsUnboundedLobLocatorMaterializationCheck implements DialectCheck {
 		public boolean isMatch(Dialect dialect) {
-			return dialect.supportsUnboundedLobLocatorMaterialization();
+			return dialect.supportsExpectedLobUsagePattern() && dialect.supportsUnboundedLobLocatorMaterialization();
 		}
 	}