diff --git a/hibernate-core/src/main/java/org/hibernate/internal/ExceptionConverterImpl.java b/hibernate-core/src/main/java/org/hibernate/internal/ExceptionConverterImpl.java
index 0913cbedc7e3..40fbce66c837 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/ExceptionConverterImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/ExceptionConverterImpl.java
@@ -45,12 +45,13 @@
 /**
  * @author Andrea Boriero
  */
-class ExceptionConverterImpl implements ExceptionConverter {
+// Extended by Hibernate Reactive
+public class ExceptionConverterImpl implements ExceptionConverter {
 
 	private final SharedSessionContractImplementor session;
 	private final boolean isJpaBootstrap;
 
-	ExceptionConverterImpl(SharedSessionContractImplementor session) {
+	public ExceptionConverterImpl(SharedSessionContractImplementor session) {
 		this.session = session;
 		isJpaBootstrap = session.getFactory().getSessionFactoryOptions().isJpaBootstrap();
 	}
diff --git a/hibernate-core/src/main/java/org/hibernate/internal/SessionFactoryImpl.java b/hibernate-core/src/main/java/org/hibernate/internal/SessionFactoryImpl.java
index 1669f84d5f0b..4c29bcfc4df2 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/SessionFactoryImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/SessionFactoryImpl.java
@@ -153,7 +153,8 @@
  * @author Steve Ebersole
  * @author Chris Cranford
  */
-class SessionFactoryImpl implements SessionFactoryImplementor {
+// Extended by Hibernate Reactive
+public class SessionFactoryImpl implements SessionFactoryImplementor {
 
 	private final String name;
 	private final String jndiName;
@@ -205,7 +206,7 @@ class SessionFactoryImpl implements SessionFactoryImplementor {
 	final transient ParameterMarkerStrategy parameterMarkerStrategy;
 	final transient JdbcValuesMappingProducerProvider jdbcValuesMappingProducerProvider;
 
-	SessionFactoryImpl(
+	public SessionFactoryImpl(
 			final MetadataImplementor bootMetamodel,
 			final SessionFactoryOptions options,
 			final BootstrapContext bootstrapContext) {
diff --git a/hibernate-core/src/main/java/org/hibernate/internal/SessionImpl.java b/hibernate-core/src/main/java/org/hibernate/internal/SessionImpl.java
index 158b9e711b5b..a37ec581e42c 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/SessionImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/SessionImpl.java
@@ -152,7 +152,8 @@
  * @author Chris Cranford
  * @author Sanne Grinovero
  */
-class SessionImpl
+// Extended by Hibernate Reactive
+public class SessionImpl
 		extends AbstractSharedSessionContract
 		implements Serializable, SharedSessionContractImplementor, JdbcSessionOwner, SessionImplementor, EventSource,
 				TransactionCoordinatorBuilder.Options, WrapperOptions, LoadAccessContext {
@@ -181,7 +182,7 @@ class SessionImpl
 
 	private transient TransactionObserver transactionObserver;
 
-	SessionImpl(SessionFactoryImpl factory, SessionCreationOptions options) {
+	public SessionImpl(SessionFactoryImpl factory, SessionCreationOptions options) {
 		super( factory, options );
 
 		final var sessionOpenEvent = getEventMonitor().beginSessionOpenEvent();
diff --git a/hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java b/hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java
index ce7237e3000a..f38757327a72 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java
@@ -116,7 +116,8 @@
  * @author Gavin King
  * @author Steve Ebersole
  */
-class StatelessSessionImpl extends AbstractSharedSessionContract implements StatelessSessionImplementor {
+// Extended by Hibernate Reactive
+public class StatelessSessionImpl extends AbstractSharedSessionContract implements StatelessSessionImplementor {
 
 	public static final MultiIdLoadOptions MULTI_ID_LOAD_OPTIONS = new MultiLoadOptions();
 
@@ -128,7 +129,7 @@ class StatelessSessionImpl extends AbstractSharedSessionContract implements Stat
 	private final FlushMode flushMode;
 	private final EventListenerGroups eventListenerGroups;
 
-	StatelessSessionImpl(SessionFactoryImpl factory, SessionCreationOptions options) {
+	public StatelessSessionImpl(SessionFactoryImpl factory, SessionCreationOptions options) {
 		super( factory, options );
 		connectionProvided = options.getConnection() != null;
 		if ( options instanceof SharedSessionCreationOptions sharedOptions