diff --git a/core/pom.xml b/core/pom.xml
index fea559f..fafa8f2 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -60,7 +60,7 @@
                 <configuration>
                     <parallel>classes</parallel>
                     <useUnlimitedThreads>true</useUnlimitedThreads>
-                    <reuseForks>true</reuseForks>
+                    <reuseForks>false</reuseForks>
                     <includes>
                         <include>**/*It.java</include>
                         <include>**/*Test.java</include>
diff --git a/core/src/main/java/com/github/dbunit/rules/DBUnitRule.java b/core/src/main/java/com/github/dbunit/rules/DBUnitRule.java
index 4f27c17..6cda678 100644
--- a/core/src/main/java/com/github/dbunit/rules/DBUnitRule.java
+++ b/core/src/main/java/com/github/dbunit/rules/DBUnitRule.java
@@ -27,19 +27,19 @@ public class DBUnitRule implements MethodRule {
   private DBUnitRule() {
   }
 
-  public final synchronized static DBUnitRule instance(Connection connection) {
+  public final static DBUnitRule instance(Connection connection) {
     return instance(new ConnectionHolderImpl(connection));
   }
 
-  public final synchronized static DBUnitRule instance(String executorName, Connection connection) {
+  public final static DBUnitRule instance(String executorName, Connection connection) {
     return instance(executorName,new ConnectionHolderImpl(connection));
   }
 
-  public final synchronized static DBUnitRule instance(ConnectionHolder connectionHolder) {
+  public final static DBUnitRule instance(ConnectionHolder connectionHolder) {
     return instance(DataSetExecutorImpl.DEFAULT_EXECUTOR_ID,connectionHolder);
   }
 
-  public final synchronized static DBUnitRule instance(String executorName, ConnectionHolder connectionHolder) {
+  public final static DBUnitRule instance(String executorName, ConnectionHolder connectionHolder) {
 
     DBUnitRule instance = new DBUnitRule();
     instance.init(executorName, connectionHolder);
diff --git a/core/src/test/java/com/github/dbunit/rules/DBUnitRulesIt.java b/core/src/test/java/com/github/dbunit/rules/DBUnitRulesIt.java
index 78b2220..ec768b0 100644
--- a/core/src/test/java/com/github/dbunit/rules/DBUnitRulesIt.java
+++ b/core/src/test/java/com/github/dbunit/rules/DBUnitRulesIt.java
@@ -2,13 +2,17 @@
 
 import com.github.dbunit.rules.api.dataset.DataSet;
 import com.github.dbunit.rules.api.dataset.SeedStrategy;
+import com.github.dbunit.rules.dataset.DataSetExecutorImpl;
 import com.github.dbunit.rules.model.Follower;
 import com.github.dbunit.rules.model.User;
+import org.junit.After;
+import org.junit.AfterClass;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import java.sql.SQLException;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -127,4 +131,9 @@ public void shouldLoadDataFromMultipleDataSets(){
         assertThat(user.getFollowers()).contains(expectedFollower);
     }
 
+    @AfterClass//optional
+    public static void close() throws SQLException {
+        DataSetExecutorImpl.getExecutorById(DataSetExecutorImpl.DEFAULT_EXECUTOR_ID).getConnection().close();
+    }
+
 }
diff --git a/core/src/test/java/com/github/dbunit/rules/MultipleDataSetsIt.java b/core/src/test/java/com/github/dbunit/rules/MultipleDataSetsIt.java
index 885940f..3fdc21c 100644
--- a/core/src/test/java/com/github/dbunit/rules/MultipleDataSetsIt.java
+++ b/core/src/test/java/com/github/dbunit/rules/MultipleDataSetsIt.java
@@ -3,8 +3,11 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 
+import java.sql.SQLException;
 import java.util.List;
 
+import com.github.dbunit.rules.dataset.DataSetExecutorImpl;
+import org.junit.AfterClass;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -36,9 +39,6 @@ public class MultipleDataSetsIt {
     @Rule
     public DBUnitRule exec2Rule = DBUnitRule.instance("exec2",emProvider2.getConnection());
 
-    @Rule
-    public DBUnitRule defaultExecutorRule = DBUnitRule.instance(emProvider.getConnection());
-
 
     @Test
     @DataSet(value = "datasets/yml/users.yml",disableConstraints = true, executorId = "exec1")
@@ -148,18 +148,6 @@ public void shouldSeedUserDataSet2() {
         assertThat(user.getId()).isEqualTo(1);
     }
 
-    @Test
-    @DataSet(value = "datasets/yml/users.yml")
-    public void shouldLoadUserFollowersWithDefaultExecutor() {
-        User user = (User) emProvider.em().createQuery("select u from User u left join fetch u.followers where u.id = 1").getSingleResult();
-        assertThat(user).isNotNull();
-        assertThat(user.getId()).isEqualTo(1);
-        assertThat(user.getTweets()).hasSize(1);
-        assertEquals(user.getTweets().get(0).getContent(), "dbunit rules!");
-        assertThat(user.getFollowers()).isNotNull().hasSize(1);
-        Follower expectedFollower = new Follower(2,1);
-        assertThat(user.getFollowers()).contains(expectedFollower);
-    }
 
     @Test
     @DataSet(value = "datasets/yml/users.yml", executorId = "exec1")
@@ -241,4 +229,11 @@ public void shouldLoadUsersFromXmlDataset2() {
         assertThat(user.getFollowers()).contains(expectedFollower);
     }
 
+
+    @AfterClass//optional
+    public static void close() throws SQLException {
+        DataSetExecutorImpl.getExecutorById("exec1").getConnection().close();
+        DataSetExecutorImpl.getExecutorById("exec2").getConnection().close();
+    }
+
 }