diff --git a/hibernate-envers/src/test/resources/hibernate.properties b/hibernate-envers/src/test/resources/hibernate.properties
index e13c1cfc22f2..c90744fca4ac 100644
--- a/hibernate-envers/src/test/resources/hibernate.properties
+++ b/hibernate-envers/src/test/resources/hibernate.properties
@@ -8,8 +8,10 @@ hibernate.connection.url @jdbc.url@
 hibernate.connection.username @jdbc.user@
 hibernate.connection.password @jdbc.pass@
 hibernate.connection.init_sql @connection.init_sql@
+hibernate.connection.autocommit false
+hibernate.connection.initial_pool_size 0
 
-hibernate.connection.pool_size 2
+hibernate.connection.pool_size 5
 
 hibernate.show_sql false
 
diff --git a/hibernate-testing/src/main/java/org/hibernate/testing/jta/JtaAwareConnectionProviderImpl.java b/hibernate-testing/src/main/java/org/hibernate/testing/jta/JtaAwareConnectionProviderImpl.java
index 64b22a7b136a..6bda67839ce7 100644
--- a/hibernate-testing/src/main/java/org/hibernate/testing/jta/JtaAwareConnectionProviderImpl.java
+++ b/hibernate-testing/src/main/java/org/hibernate/testing/jta/JtaAwareConnectionProviderImpl.java
@@ -62,6 +62,7 @@
 import org.hibernate.service.spi.ServiceRegistryAwareService;
 import org.hibernate.service.spi.ServiceRegistryImplementor;
 import org.hibernate.service.spi.Stoppable;
+import org.hibernate.testing.jdbc.SharedDriverManagerConnectionProviderImpl;
 
 /**
  * A {@link ConnectionProvider} implementation intended for testing Hibernate/JTA interaction.  In that limited scope we
@@ -75,7 +76,7 @@ public class JtaAwareConnectionProviderImpl implements ConnectionProvider, Confi
 		ServiceRegistryAwareService {
 	private static final String CONNECTION_KEY = "_database_connection";
 
-	private final DriverManagerConnectionProviderImpl delegate = new DriverManagerConnectionProviderImpl();
+	private final DriverManagerConnectionProviderImpl delegate = SharedDriverManagerConnectionProviderImpl.getInstance();
 
 	private final List<Connection> nonEnlistedConnections = new ArrayList<>();