diff --git a/test/functions/hello/index.ts b/test/functions/hello/index.ts
new file mode 100644
index 0000000..68e5c0f
--- /dev/null
+++ b/test/functions/hello/index.ts
@@ -0,0 +1,38 @@
+// Follow this setup guide to integrate the Deno language server with your editor:
+// https://deno.land/manual/getting_started/setup_your_environment
+// This enables autocomplete, go to definition, etc.
+
+console.log("Hello from Functions!");
+
+Deno.serve(async (req) => {
+  const { name } = await req.json();
+  const data = {
+    message: `Hello ${name}!`,
+  };
+
+  if (name === "") {
+    return new Response(JSON.stringify({ error: "Body request is invalid" }), {
+      status: 400,
+      headers: { "Content-Type": "application/json" },
+    });
+  }
+  if (name === "error") {
+    return Error("An error occurred");
+  }
+
+  return new Response(JSON.stringify(data), {
+    headers: { "Content-Type": "application/json" },
+  });
+});
+
+/* To invoke locally:
+
+  1. Run `supabase start` (see: https://supabase.com/docs/reference/cli/supabase-start)
+  2. Make an HTTP request:
+
+  curl -i --location --request POST 'http://127.0.0.1:54321/functions/v1/hello' \
+    --header 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6ImFub24iLCJleHAiOjE5ODM4MTI5OTZ9.CRXP1A7WOeoJeXxjNni43kdQwgnWNReilDMblYTn_I0' \
+    --header 'Content-Type: application/json' \
+    --data '{"name":"Functions"}'
+
+*/
diff --git a/test/integration/functions_test.go b/test/integration/functions_test.go
new file mode 100644
index 0000000..c0d85db
--- /dev/null
+++ b/test/integration/functions_test.go
@@ -0,0 +1,41 @@
+package functions_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/supabase-community/functions-go"
+)
+
+const (
+	rawUrl = "https://your-supabase-url.co/functions/v1"
+	token  = "supbase-service-key"
+)
+
+// TestHello tests the normal function
+func TestHello(t *testing.T) {
+	client := functions.NewClient(rawUrl, token, nil)
+	type Body struct {
+		Name string `json:"name"`
+	}
+	b := Body{Name: "world"}
+	resp, err := client.Invoke("hello", b)
+	if err != nil {
+		t.Fatalf("Invoke failed: %s", err)
+	}
+	fmt.Println(resp)
+}
+
+// TestErrorHandling tests the error handling of the functions client
+func TestErrorHandling(t *testing.T) {
+	client := functions.NewClient(rawUrl, token, map[string]string{"custom-header": "custom-header"})
+	type Body struct {
+		Name string `json:"name"`
+	}
+	b := Body{Name: "error"}
+	resp, err := client.Invoke("hello", b)
+	if err != nil {
+		t.Fatalf("Invoke failed: %s", err)
+	}
+	fmt.Println(resp)
+}