diff --git a/go.mod b/go.mod
index 2e0d7b5..3096cb9 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,12 @@
 module example/hello
 
 go 1.22.2
+
+require github.com/test-go/testify v1.1.4
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.10.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..c3b9e8a
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/test-go/testify v1.1.4 h1:Tf9lntrKUMHiXQ07qBScBTSA0dhYQlu83hswqelv1iE=
+github.com/test-go/testify v1.1.4/go.mod h1:rH7cfJo/47vWGdi4GPj16x3/t1xGOj2YxzmNQzk2ghU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/hello.go b/hello.go
index 58fb8b3..43ea4ba 100644
--- a/hello.go
+++ b/hello.go
@@ -3,7 +3,10 @@ package main
 import "fmt"
 
 func main() {
-	fmt.Println("Hello, World!")
-	i := 101
-	fmt.Println(i)
+	name := "Worlds"
+	fmt.Println(getGreeting(name))
+}
+
+func getGreeting(name string) string {
+	return fmt.Sprintf("Hello, %s!", name)
 }
diff --git a/hello_test.go b/hello_test.go
new file mode 100644
index 0000000..858dc8c
--- /dev/null
+++ b/hello_test.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/test-go/testify/require"
+)
+
+func Test_getGreeting(t *testing.T) {
+	t.Run("success", func(t *testing.T) {
+		require.Equal(t, "Hello, World!", getGreeting("World"))
+	})
+}