diff --git a/dbunit/src/main/resources/logback.xml b/dbunit/src/main/resources/logback.xml
index 7d900d8ea8..26beb6d5b4 100644
--- a/dbunit/src/main/resources/logback.xml
+++ b/dbunit/src/main/resources/logback.xml
@@ -8,6 +8,6 @@
     
 
     
-        
+        
     
 
\ No newline at end of file
diff --git a/dbunit/src/test/java/com/baeldung/dbunit/ConnectionSettings.java b/dbunit/src/test/java/com/baeldung/dbunit/ConnectionSettings.java
new file mode 100644
index 0000000000..e842022292
--- /dev/null
+++ b/dbunit/src/test/java/com/baeldung/dbunit/ConnectionSettings.java
@@ -0,0 +1,8 @@
+package com.baeldung.dbunit;
+
+public class ConnectionSettings {
+    public static final String JDBC_DRIVER = org.h2.Driver.class.getName();
+    public static final String JDBC_URL = "jdbc:h2:mem:default;DB_CLOSE_DELAY=-1;init=runscript from 'classpath:schema.sql'";
+    public static final String USER = "sa";
+    public static final String PASSWORD = "";
+}
diff --git a/dbunit/src/test/java/com/baeldung/dbunit/OldSchoolDbUnitTest.java b/dbunit/src/test/java/com/baeldung/dbunit/OldSchoolDbUnitTest.java
index e64b49263a..0b63184951 100644
--- a/dbunit/src/test/java/com/baeldung/dbunit/OldSchoolDbUnitTest.java
+++ b/dbunit/src/test/java/com/baeldung/dbunit/OldSchoolDbUnitTest.java
@@ -1,6 +1,5 @@
 package com.baeldung.dbunit;
 
-import org.dbunit.Assertion;
 import org.dbunit.IDatabaseTester;
 import org.dbunit.JdbcDatabaseTester;
 import org.dbunit.dataset.IDataSet;
@@ -17,14 +16,14 @@ import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.ResultSet;
 
+import static com.baeldung.dbunit.ConnectionSettings.JDBC_DRIVER;
+import static com.baeldung.dbunit.ConnectionSettings.JDBC_URL;
+import static com.baeldung.dbunit.ConnectionSettings.PASSWORD;
+import static com.baeldung.dbunit.ConnectionSettings.USER;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.dbunit.Assertion.assertEquals;
 
 public class OldSchoolDbUnitTest {
-    private static final String JDBC_DRIVER = org.h2.Driver.class.getName();
-    private static final String JDBC_URL = "jdbc:h2:mem:default;DB_CLOSE_DELAY=-1;init=runscript from 'classpath:schema.sql'";
-    private static final String USER = "sa";
-    private static final String PASSWORD = "";
 
     private static IDatabaseTester tester = null;
 
@@ -99,20 +98,31 @@ public class OldSchoolDbUnitTest {
 
     @Test
     public void testUpdate() throws Exception {
-        // Arrange
         final Connection connection = tester.getConnection().getConnection();
 
         final InputStream is = OldSchoolDbUnitTest.class.getClassLoader().getResourceAsStream("items_exp_rename.xml");
-        ITable expectedTable = new FlatXmlDataSetBuilder().build(is).getTable("items");
-        //expectedTable = DefaultColumnFilter.excludedColumnsTable(expectedTable, new String[]{"produced"});
+        final ITable expectedTable = new FlatXmlDataSetBuilder().build(is).getTable("items");
 
-        // Act
         connection.createStatement().executeUpdate("update ITEMS set title='new name' where id = 1");
 
-        // Assert
         final IDataSet databaseDataSet = tester.getConnection().createDataSet();
         ITable actualTable = databaseDataSet.getTable("items");
-        //actualTable = DefaultColumnFilter.excludedColumnsTable(actualTable, new String[]{"produced"});
+
+        assertEquals(expectedTable, actualTable);
+    }
+
+    @Test
+    public void testUpdateWithExcludedColumns() throws Exception {
+        final Connection connection = tester.getConnection().getConnection();
+
+        final InputStream is = OldSchoolDbUnitTest.class.getClassLoader().getResourceAsStream("items_exp_rename_no_produced.xml");
+        ITable expectedTable = new FlatXmlDataSetBuilder().build(is).getTable("items");
+
+        connection.createStatement().executeUpdate("update ITEMS set title='new name' where id = 1");
+
+        final IDataSet databaseDataSet = tester.getConnection().createDataSet();
+        ITable actualTable = databaseDataSet.getTable("items");
+        actualTable = DefaultColumnFilter.excludedColumnsTable(actualTable, new String[]{"produced"});
 
         assertEquals(expectedTable, actualTable);
     }
diff --git a/dbunit/src/test/java/com/baeldung/dbunit/PrepAndExpectedDbUnitTest.java b/dbunit/src/test/java/com/baeldung/dbunit/PrepAndExpectedDbUnitTest.java
index c322cf0ae3..bb70136de2 100644
--- a/dbunit/src/test/java/com/baeldung/dbunit/PrepAndExpectedDbUnitTest.java
+++ b/dbunit/src/test/java/com/baeldung/dbunit/PrepAndExpectedDbUnitTest.java
@@ -16,13 +16,13 @@ import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.ResultSet;
 
+import static com.baeldung.dbunit.ConnectionSettings.JDBC_DRIVER;
+import static com.baeldung.dbunit.ConnectionSettings.JDBC_URL;
+import static com.baeldung.dbunit.ConnectionSettings.PASSWORD;
+import static com.baeldung.dbunit.ConnectionSettings.USER;
 import static org.assertj.core.api.Assertions.assertThat;
 
 public class PrepAndExpectedDbUnitTest extends DefaultPrepAndExpectedTestCase {
-    private static final String JDBC_DRIVER = org.h2.Driver.class.getName();
-    private static final String JDBC_URL = "jdbc:h2:mem:default;DB_CLOSE_DELAY=-1;init=runscript from 'classpath:schema.sql'";
-    private static final String USER = "sa";
-    private static final String PASSWORD = "";
 
     @Override
     public void setUp() throws Exception {
@@ -49,60 +49,46 @@ public class PrepAndExpectedDbUnitTest extends DefaultPrepAndExpectedTestCase {
 
     @Test
     public void testSelect() throws Exception {
-        // Arrange
         final Connection connection = getConnection().getConnection();
         final VerifyTableDefinition[] verifyTables = {new VerifyTableDefinition("USERS", new String[]{})};
         final String[] prepDataFiles = {"/users.xml"};
         final String[] expectedDataFiles = {"/users.xml"};
-        final PrepAndExpectedTestCaseSteps testSteps = () -> {
-            // invoke the method being tested here; for the sake of simplicity we use JDBC API directly in this example
-            final ResultSet rs = connection.createStatement().executeQuery("select * from USERS where id = 1");
+        final PrepAndExpectedTestCaseSteps testSteps =
+                () -> connection
+                        .createStatement()
+                        .executeQuery("select * from USERS where id = 1");
 
-            // either place assertions here
-            //assertTrue(rs.next());
-            //assertEquals("Xavier", rs.getString("last_name"));
-
-            return rs;
-        };
-
-        // Act
         final ResultSet rs = (ResultSet) super.runTest(verifyTables, prepDataFiles, expectedDataFiles, testSteps);
 
-        // or place assertions at the end
         assertThat(rs.next()).isTrue();
         assertThat(rs.getString("last_name")).isEqualTo("Xavier");
     }
 
     @Test
     public void testUpdate() throws Exception {
-        // Arrange
         final Connection connection = getConnection().getConnection();
         final VerifyTableDefinition[] verifyTables = {new VerifyTableDefinition("USERS", new String[]{})}; // define tables to verify
-        final String[] prepDataFiles = {"/users.xml"}; // define prep files
-        final String[] expectedDataFiles = {"/users_exp_rename.xml"}; // define expected files
-        final PrepAndExpectedTestCaseSteps testSteps = () -> {
-            // invoke the method being tested here; for the sake of simplicity we use JDBC API directly in this example
-            return connection.createStatement().executeUpdate("update USERS set first_name = 'new name' where id = 1");
-            // after this method exits, dbUnit will:
-            //  * verify configured tables
-            //  * cleanup tables as configured
-        };
+        final String[] prepDataFiles = {"/users.xml"};
+        final String[] expectedDataFiles = {"/users_exp_rename.xml"};
+        final PrepAndExpectedTestCaseSteps testSteps =
+                () -> connection
+                        .createStatement()
+                        .executeUpdate("update USERS set first_name = 'new name' where id = 1");
 
-        // Act
         super.runTest(verifyTables, prepDataFiles, expectedDataFiles, testSteps);
     }
 
     @Test
     public void testDelete() throws Exception {
-        // Arrange
         final Connection connection = getConnection().getConnection();
         final VerifyTableDefinition[] verifyTables = {new VerifyTableDefinition("USERS", new String[]{})};
         final String[] prepDataFiles = {"/users.xml"};
         final String[] expectedDataFiles = {"/users_exp_delete.xml"};
         final PrepAndExpectedTestCaseSteps testSteps =
-                () -> connection.createStatement().executeUpdate("delete from USERS where id = 2");
+                () -> connection
+                        .createStatement()
+                        .executeUpdate("delete from USERS where id = 2");
 
-        // Act
         super.runTest(verifyTables, prepDataFiles, expectedDataFiles, testSteps);
     }
 
diff --git a/dbunit/src/test/java/com/baeldung/dbunit/SampleDbUnitTest.java b/dbunit/src/test/java/com/baeldung/dbunit/SampleDbUnitTest.java
index cfe4fd4e11..f7970754e7 100644
--- a/dbunit/src/test/java/com/baeldung/dbunit/SampleDbUnitTest.java
+++ b/dbunit/src/test/java/com/baeldung/dbunit/SampleDbUnitTest.java
@@ -13,11 +13,13 @@ import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.ResultSet;
 
+import static com.baeldung.dbunit.ConnectionSettings.JDBC_DRIVER;
+import static com.baeldung.dbunit.ConnectionSettings.JDBC_URL;
+import static com.baeldung.dbunit.ConnectionSettings.PASSWORD;
+import static com.baeldung.dbunit.ConnectionSettings.USER;
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class SampleDbUnitTest extends DBTestCase {
-    private static final String JDBC_DRIVER = org.h2.Driver.class.getName();
-    private static final String JDBC_URL = "jdbc:h2:mem:default;DB_CLOSE_DELAY=-1;init=runscript from 'classpath:schema.sql'";
-    private static final String USER = "sa";
-    private static final String PASSWORD = "";
 
     public SampleDbUnitTest(String name) {
         super(name);
@@ -46,29 +48,23 @@ public class SampleDbUnitTest extends DBTestCase {
 
     @Test
     public void testSelect() throws Exception {
-        // Arrange
         final Connection connection = getConnection().getConnection();
 
-        // Act
         final ResultSet rs = connection.createStatement().executeQuery("select * from iTEMS where id = 1");
 
-        // Assert
-        assertTrue(rs.next());
-        assertEquals("Grey T-Shirt", rs.getString("title"));
+        assertThat(rs.next()).isTrue();
+        assertThat(rs.getString("title")).isEqualTo("Grey T-Shirt");
     }
 
     @Test
     public void testDelete() throws Exception {
-        // Arrange
         final Connection connection = getConnection().getConnection();
 
         final InputStream is = SampleDbUnitTest.class.getClassLoader().getResourceAsStream("items_exp_delete.xml");
         ITable expectedTable = (new FlatXmlDataSetBuilder().build(is)).getTable("items");
 
-        // Act
         connection.createStatement().executeUpdate("delete from ITEMS where id = 2");
 
-        // Assert
         final IDataSet databaseDataSet = getConnection().createDataSet();
         ITable actualTable = databaseDataSet.getTable("items");
 
@@ -77,16 +73,13 @@ public class SampleDbUnitTest extends DBTestCase {
 
     @Test
     public void testUpdate() throws Exception {
-        // Arrange
         final Connection connection = getConnection().getConnection();
 
         final InputStream is = SampleDbUnitTest.class.getClassLoader().getResourceAsStream("items_exp_rename.xml");
         ITable expectedTable = (new FlatXmlDataSetBuilder().build(is)).getTable("items");
 
-        // Act
         connection.createStatement().executeUpdate("update ITEMS set title='new name' where id = 1");
 
-        // Assert
         final IDataSet databaseDataSet = getConnection().createDataSet();
         ITable actualTable = databaseDataSet.getTable("items");
 
diff --git a/dbunit/src/test/resources/data.xml b/dbunit/src/test/resources/data.xml
index e4498513e0..ac413cfd23 100644
--- a/dbunit/src/test/resources/data.xml
+++ b/dbunit/src/test/resources/data.xml
@@ -1,11 +1,11 @@
 
 
 
-	
+    
 
-	
-	
-	
-	
-	
+    
+    
+    
+    
+    
 
diff --git a/dbunit/src/test/resources/items_exp_delete.xml b/dbunit/src/test/resources/items_exp_delete.xml
index 1aaeff59ca..09b78da493 100644
--- a/dbunit/src/test/resources/items_exp_delete.xml
+++ b/dbunit/src/test/resources/items_exp_delete.xml
@@ -1,8 +1,8 @@
 
 
 
-	
-	
-	
-	
+    
+    
+    
+    
 
diff --git a/dbunit/src/test/resources/items_exp_delete_no_produced.xml b/dbunit/src/test/resources/items_exp_delete_no_produced.xml
index c9b182a1b2..dd76e8c6ce 100644
--- a/dbunit/src/test/resources/items_exp_delete_no_produced.xml
+++ b/dbunit/src/test/resources/items_exp_delete_no_produced.xml
@@ -1,8 +1,8 @@
 
 
 
-	
-	
-	
-	
+    
+    
+    
+    
 
diff --git a/dbunit/src/test/resources/items_exp_rename.xml b/dbunit/src/test/resources/items_exp_rename.xml
index 237280e758..830d83499f 100644
--- a/dbunit/src/test/resources/items_exp_rename.xml
+++ b/dbunit/src/test/resources/items_exp_rename.xml
@@ -1,9 +1,9 @@
 
 
 
-	
-	
-	
-	
-	
+    
+    
+    
+    
+    
 
diff --git a/dbunit/src/test/resources/items_exp_rename_no_produced.xml b/dbunit/src/test/resources/items_exp_rename_no_produced.xml
new file mode 100644
index 0000000000..991c4726a0
--- /dev/null
+++ b/dbunit/src/test/resources/items_exp_rename_no_produced.xml
@@ -0,0 +1,9 @@
+
+
+
+    
+    
+    
+    
+    
+
diff --git a/dbunit/src/test/resources/schema.sql b/dbunit/src/test/resources/schema.sql
index 9b5018985a..dc4738ca76 100644
--- a/dbunit/src/test/resources/schema.sql
+++ b/dbunit/src/test/resources/schema.sql
@@ -1,28 +1,28 @@
 CREATE TABLE IF NOT EXISTS USERS
 (
-  `id`         int AUTO_INCREMENT NOT NULL,
-  `first_name` varchar(100)       NOT NULL,
-  `last_name`  varchar(100)       NOT NULL,
-  PRIMARY KEY (`id`)
+    `id`         int AUTO_INCREMENT NOT NULL,
+    `first_name` varchar(100)       NOT NULL,
+    `last_name`  varchar(100)       NOT NULL,
+    PRIMARY KEY (`id`)
 );
 
 CREATE TABLE IF NOT EXISTS ITEMS
 (
-  `id`       int AUTO_INCREMENT NOT NULL,
-  `title`    varchar(100)       NOT NULL,
-  `produced` date,
-  `price`    float,
-  PRIMARY KEY (`id`)
+    `id`       int AUTO_INCREMENT NOT NULL,
+    `title`    varchar(100)       NOT NULL,
+    `produced` date,
+    `price`    float,
+    PRIMARY KEY (`id`)
 );
 
 CREATE TABLE IF NOT EXISTS PURCHASES
 (
-  `id`          int     NOT NULL AUTO_INCREMENT,
-  `id_user`     int     NOT NULL,
-  `id_item`     int     NOT NULL,
-  `total_price` float   NOT NULL,
-  `quantity`    int(11) NOT NULL,
-  PRIMARY KEY (`id`),
-  FOREIGN KEY (`id_user`) REFERENCES USERS (`id`) ON DELETE CASCADE,
-  FOREIGN KEY (`id_item`) REFERENCES ITEMS (`id`) ON DELETE CASCADE ON UPDATE CASCADE
+    `id`          int     NOT NULL AUTO_INCREMENT,
+    `id_user`     int     NOT NULL,
+    `id_item`     int     NOT NULL,
+    `total_price` float   NOT NULL,
+    `quantity`    int(11) NOT NULL,
+    PRIMARY KEY (`id`),
+    FOREIGN KEY (`id_user`) REFERENCES USERS (`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`id_item`) REFERENCES ITEMS (`id`) ON DELETE CASCADE ON UPDATE CASCADE
 );
diff --git a/dbunit/src/test/resources/users.xml b/dbunit/src/test/resources/users.xml
index cebadf2e67..d8ff78024e 100644
--- a/dbunit/src/test/resources/users.xml
+++ b/dbunit/src/test/resources/users.xml
@@ -1,7 +1,7 @@
 
 
 
-	
-	
-	
+    
+    
+    
 
diff --git a/dbunit/src/test/resources/users_exp_delete.xml b/dbunit/src/test/resources/users_exp_delete.xml
index 8b72ceef89..c4ea6e64e5 100644
--- a/dbunit/src/test/resources/users_exp_delete.xml
+++ b/dbunit/src/test/resources/users_exp_delete.xml
@@ -1,6 +1,6 @@
 
 
 
-	
-	
+    
+    
 
diff --git a/dbunit/src/test/resources/users_exp_rename.xml b/dbunit/src/test/resources/users_exp_rename.xml
index 9bc1254967..c187e1ebe5 100644
--- a/dbunit/src/test/resources/users_exp_rename.xml
+++ b/dbunit/src/test/resources/users_exp_rename.xml
@@ -1,7 +1,7 @@
 
 
 
-	
-	
-	
+    
+    
+