diff --git a/test/controller/InstanceInfo.js b/test/controller/InstanceInfo.js
new file mode 100644
index 00000000..4098c30a
--- /dev/null
+++ b/test/controller/InstanceInfo.js
@@ -0,0 +1,40 @@
+"use strict";
+const assert = require("assert").strict;
+
+const { InstanceInfo } = require("@clusterio/controller");
+const lib = require("@clusterio/lib");
+
+
+describe("controller/InstanceInfo", function() {
+	describe("class InstanceInfo", function() {
+		it("should round trip serialize", async function() {
+			const validate = lib.compile(InstanceInfo.jsonSchema);
+			function check(info) {
+				const json = JSON.parse(JSON.stringify(info));
+				if (!validate(json)) {
+					throw validate.errors;
+				}
+				assert.deepEqual(InstanceInfo.fromJSON(json, info.config), info);
+			}
+
+			if (!lib.InstanceConfig._finalized) {
+				lib.InstanceConfig.finalize();
+			}
+			const config = new lib.InstanceConfig("controller");
+			await config.init();
+
+			check(InstanceInfo.fromJSON({ config, status: "stopped" }, config));
+			check(InstanceInfo.fromJSON({ config, status: "running" }, config));
+			check(InstanceInfo.fromJSON({ config, status: "running", gamePort: 34197 }, config));
+			check(InstanceInfo.fromJSON({ config, status: "running", updatedAt: Date.now() }, config));
+
+			// All at once
+			check(InstanceInfo.fromJSON({
+				config,
+				status: "unknown",
+				gamePort: 10000,
+				updateAt: 20000,
+			}, config));
+		});
+	});
+});