diff --git a/jooq-spring/src/test/java/com/baeldung/jooq/springboot/Application.java b/jooq-spring/src/test/java/com/baeldung/jooq/springboot/Application.java
index 95e00fd5fb..4865b575e1 100644
--- a/jooq-spring/src/test/java/com/baeldung/jooq/springboot/Application.java
+++ b/jooq-spring/src/test/java/com/baeldung/jooq/springboot/Application.java
@@ -9,7 +9,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
 import org.springframework.core.env.Environment;
-import org.springframework.jdbc.datasource.DataSourceTransactionManager;
 import org.springframework.jdbc.datasource.DriverManagerDataSource;
 import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
 import org.springframework.transaction.annotation.EnableTransactionManagement;
@@ -23,8 +22,6 @@ public class Application {
     @Autowired
     private Environment environment;
 
-    private DataSource dataSource;
-
     public DataSource dataSource() {
         DriverManagerDataSource dataSource = new DriverManagerDataSource();
 
@@ -40,10 +37,6 @@ public class Application {
         return new TransactionAwareDataSourceProxy(dataSource());
     }
 
-    public DataSourceTransactionManager transactionManager() {
-        return new DataSourceTransactionManager(dataSource);
-    }
-    
     @Bean
     public DataSourceConnectionProvider connectionProvider() {
         return new DataSourceConnectionProvider(transactionAwareDataSource());