diff --git a/internal/server/server_test.go b/internal/server/server_test.go
new file mode 100644
index 00000000..877b2a87
--- /dev/null
+++ b/internal/server/server_test.go
@@ -0,0 +1,33 @@
+package server
+
+import (
+	"encoding/json"
+	"io"
+	"log/slog"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestHealthz(t *testing.T) {
+	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)))
+	ts := httptest.NewServer(s.Router())
+	defer ts.Close()
+
+	resp, err := http.Get(ts.URL + "/healthz")
+	if err != nil {
+		t.Fatalf("GET /healthz: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		t.Errorf("status = %d, want 200", resp.StatusCode)
+	}
+	var body map[string]string
+	if err := json.NewDecoder(resp.Body).Decode(&body); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if body["status"] != "ok" {
+		t.Errorf("body = %v, want status=ok", body)
+	}
+}