diff --git a/test/appservice/integration/provisionTest.ts b/test/appservice/integration/provisionTest.ts
index bcc5268..106654a 100644
--- a/test/appservice/integration/provisionTest.ts
+++ b/test/appservice/integration/provisionTest.ts
@@ -10,6 +10,7 @@ interface Context extends Mocha.Context {
     appservice?:  MjolnirAppService
 }
 
+// Necessary for CI: Node 17+ defaults to using ipv6 first, but Github Actions does not support ipv6
 dns.setDefaultResultOrder('ipv4first');
 
 describe("Test that the app service can provision a mjolnir on invite of the appservice bot", function () {
diff --git a/test/appservice/integration/webAPITest.ts b/test/appservice/integration/webAPITest.ts
index f6dd607..1b5165e 100644
--- a/test/appservice/integration/webAPITest.ts
+++ b/test/appservice/integration/webAPITest.ts
@@ -13,6 +13,7 @@ interface Context extends Mocha.Context {
     moderator?: MatrixClient
 }
 
+// Necessary for CI: Node 17+ defaults to using ipv6 first, but Github Actions does not support ipv6
 dns.setDefaultResultOrder('ipv4first');
 
 describe("Test that the app service can provision a mjolnir when requested from the web API", function () {
diff --git a/test/integration/fixtures.ts b/test/integration/fixtures.ts
index a75dd6f..b91cfc8 100644
--- a/test/integration/fixtures.ts
+++ b/test/integration/fixtures.ts
@@ -3,6 +3,7 @@ import { makeMjolnir, teardownManagementRoom } from "./mjolnirSetupUtils";
 import { register } from "prom-client";
 import dns from 'node:dns';
 
+// Necessary for CI: Node 17+ defaults to using ipv6 first, but Github Actions does not support ipv6
 dns.setDefaultResultOrder('ipv4first');
 
 // When Mjolnir starts (src/index.ts) it clobbers the config by resolving the management room