diff --git a/hello/go.mod b/hello/go.mod
new file mode 100644
index 0000000..0c111d1
--- /dev/null
+++ b/hello/go.mod
@@ -0,0 +1,3 @@
+module hello
+
+go 1.22.1
diff --git a/hello/hello.go b/hello/hello.go
new file mode 100644
index 0000000..f6ea0d7
--- /dev/null
+++ b/hello/hello.go
@@ -0,0 +1,11 @@
+package main
+
+import "fmt"
+
+func Hello() string {
+  return "Hello, world!"
+}
+
+func main () {
+  fmt.Println(Hello())
+}
diff --git a/hello/hello_test.go b/hello/hello_test.go
new file mode 100644
index 0000000..20d88d0
--- /dev/null
+++ b/hello/hello_test.go
@@ -0,0 +1,12 @@
+package main
+
+import "testing"
+
+func TestHello(t *testing.T) {
+  given := Hello()
+  expected := "Hello, world!"
+
+  if given != expected {
+    t.Errorf("given: %v, expected: %v", given, expected)
+  }
+}