diff --git a/src/main/java/space/kklochko/simple_jbdd/test_examples/Sum.java b/src/main/java/space/kklochko/simple_jbdd/test_examples/Sum.java
deleted file mode 100644
index 86256a6..0000000
--- a/src/main/java/space/kklochko/simple_jbdd/test_examples/Sum.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package space.kklochko.simple_jbdd.test_examples;
-
-public class Sum {
-    static int sum(int a, int b) {
-        return a + b;
-    }
-}
-
diff --git a/src/main/java/space/kklochko/simple_jbdd/test_examples/samples/Sum.java b/src/main/java/space/kklochko/simple_jbdd/test_examples/samples/Sum.java
new file mode 100644
index 0000000..3fa4d2a
--- /dev/null
+++ b/src/main/java/space/kklochko/simple_jbdd/test_examples/samples/Sum.java
@@ -0,0 +1,8 @@
+package space.kklochko.simple_jbdd.test_examples.samples;
+
+public class Sum {
+    public static int sum(int a, int b) {
+        return a + b;
+    }
+}
+
diff --git a/src/test/groovy/space/kklochko/simple_jbdd/test_examples/SumSpec.groovy b/src/test/groovy/space/kklochko/simple_jbdd/test_examples/samples/SumSpec.groovy
similarity index 61%
rename from src/test/groovy/space/kklochko/simple_jbdd/test_examples/SumSpec.groovy
rename to src/test/groovy/space/kklochko/simple_jbdd/test_examples/samples/SumSpec.groovy
index bf77edd..75c897c 100644
--- a/src/test/groovy/space/kklochko/simple_jbdd/test_examples/SumSpec.groovy
+++ b/src/test/groovy/space/kklochko/simple_jbdd/test_examples/samples/SumSpec.groovy
@@ -1,5 +1,6 @@
-package space.kklochko.simple_jbdd.test_examples
+package space.kklochko.simple_jbdd.test_examples.samples
 
+import space.kklochko.simple_jbdd.test_examples.samples.Sum
 import spock.lang.Specification
 
 class SumSpec extends Specification {