diff --git a/2021-08/spring-26-spring-batch/.gitignore b/2021-08/spring-26-spring-batch/.gitignore
index df5b9bed..7622f151 100644
--- a/2021-08/spring-26-spring-batch/.gitignore
+++ b/2021-08/spring-26-spring-batch/.gitignore
@@ -5,4 +5,5 @@ target/
 
 output.csv
 *.log
-*.dat
+output*.dat
+test-output.dat
diff --git a/2021-08/spring-26-spring-batch/src/test/resources/expected-test-output.dat b/2021-08/spring-26-spring-batch/src/test/resources/expected-test-output.dat
new file mode 100644
index 00000000..b4c926b1
--- /dev/null
+++ b/2021-08/spring-26-spring-batch/src/test/resources/expected-test-output.dat
@@ -0,0 +1,16 @@
+Person(name=Ivan, age=24)
+Person(name=John, age=25)
+Person(name=Ivan, age=24)
+Person(name=John, age=25)
+Person(name=Ivan, age=24)
+Person(name=Mary, age=25)
+Person(name=Ivan, age=24)
+Person(name=John, age=25)
+Person(name=Sunny, age=24)
+Person(name=John, age=25)
+Person(name=Ivan, age=24)
+Person(name=John, age=25)
+Person(name=Ivan, age=24)
+Person(name=John, age=25)
+Person(name=Ivan, age=24)
+Person(name=John, age=25)