diff --git a/examples/gno.land/r/demo/users/gno.mod b/examples/gno.land/r/demo/users/gno.mod
index 61b11c09b80..b6f6e640c36 100644
--- a/examples/gno.land/r/demo/users/gno.mod
+++ b/examples/gno.land/r/demo/users/gno.mod
@@ -4,4 +4,5 @@ require (
 	gno.land/p/demo/avl v0.0.0-latest
 	gno.land/p/demo/avlhelpers v0.0.0-latest
 	gno.land/p/demo/users v0.0.0-latest
+	gno.land/p/demo/uassert v0.0.0-latest
 )
diff --git a/examples/gno.land/r/demo/users/users_test.gno b/examples/gno.land/r/demo/users/users_test.gno
new file mode 100644
index 00000000000..cd664867ebc
--- /dev/null
+++ b/examples/gno.land/r/demo/users/users_test.gno
@@ -0,0 +1,14 @@
+package users
+
+import (
+	"testing"
+	"strconv"
+
+	"gno.land/p/demo/uassert"
+)
+
+func TestPreRegisteredTest1(t *testing.T) {
+	names := ListUsersByPrefix("test1", 1)
+	uassert.Equal(t, len(names), 1)
+	uassert.Equal(t, names[0], "test1")
+}