diff --git a/test/fixtures/env.js b/test/fixtures/env.js
index 67f22edb..57adf7ad 100644
--- a/test/fixtures/env.js
+++ b/test/fixtures/env.js
@@ -1,4 +1,13 @@
 "use strict";
 
+const fs = require("fs");
+
 const home = require("path").join(__dirname, ".thelounge");
 require("../../src/helper").setHome(home);
+
+const STSPolicies = require("../../src/plugins/sts"); // Must be imported *after* setHome
+
+exports.mochaGlobalTeardown = async function () {
+	STSPolicies.refresh.cancel(); // Cancel debounced function, so it does not write later
+	fs.unlinkSync(STSPolicies.stsFile);
+};
diff --git a/test/models/network.js b/test/models/network.js
index 12d9b01e..5b2b7eef 100644
--- a/test/models/network.js
+++ b/test/models/network.js
@@ -6,6 +6,7 @@ const Msg = require("../../src/models/msg");
 const User = require("../../src/models/user");
 const Network = require("../../src/models/network");
 const Helper = require("../../src/helper");
+const STSPolicies = require("../../src/plugins/sts");
 
 describe("Network", function () {
 	describe("Network(attr)", function () {
@@ -173,6 +174,33 @@ describe("Network", function () {
 
 			Helper.config.lockNetwork = false;
 		});
+
+		it("should apply STS policies iff they match", function () {
+			const client = {idMsg: 1, emit() {}};
+			STSPolicies.update("irc.example.com", 7000, 3600);
+
+			let network = new Network({
+				host: "irc.example.com",
+				port: 1337,
+				tls: false,
+			});
+
+			expect(network.validate(client)).to.be.true;
+			expect(network.port).to.equal(7000);
+			expect(network.tls).to.be.true;
+
+			network = new Network({
+				host: "irc2.example.com",
+				port: 1337,
+				tls: false,
+			});
+
+			expect(network.validate(client)).to.be.true;
+			expect(network.port).to.equal(1337);
+			expect(network.tls).to.be.false;
+
+			STSPolicies.update("irc.example.com", 7000, 0); // Cleanup
+		});
 	});
 
 	describe("#edit(client, args)", function () {