diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b0c3d4744f9a..938486f6909d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,6 @@ jobs:
         include:
           - node-version: 16
             os: ubuntu-latest
-        include:
           - node-version: 18
             os: ubuntu-latest
     env:
diff --git a/packages/kit/src/core/config/index.spec.js b/packages/kit/src/core/config/index.spec.js
index 5ff8b142593d..eda31028f8b5 100644
--- a/packages/kit/src/core/config/index.spec.js
+++ b/packages/kit/src/core/config/index.spec.js
@@ -240,7 +240,7 @@ test('fails if paths.base is not root-relative', () => {
 				}
 			}
 		});
-	}, /^config\.kit\.paths\.base option must be a root-relative path that starts but doesn't end with '\/'. See https:\/\/kit\.svelte\.dev\/docs\/configuration#paths$/);
+	}, /^config\.kit\.paths\.base option must either be the empty string or a root-relative path that starts but doesn't end with '\/'. See https:\/\/kit\.svelte\.dev\/docs\/configuration#paths$/);
 });
 
 test("fails if paths.base ends with '/'", () => {
@@ -252,7 +252,7 @@ test("fails if paths.base ends with '/'", () => {
 				}
 			}
 		});
-	}, /^config\.kit\.paths\.base option must be a root-relative path that starts but doesn't end with '\/'. See https:\/\/kit\.svelte\.dev\/docs\/configuration#paths$/);
+	}, /^config\.kit\.paths\.base option must either be the empty string or a root-relative path that starts but doesn't end with '\/'. See https:\/\/kit\.svelte\.dev\/docs\/configuration#paths$/);
 });
 
 test('fails if paths.assets is relative', () => {
diff --git a/packages/kit/src/core/config/options.js b/packages/kit/src/core/config/options.js
index 2700fe5adff4..47a9d221e46e 100644
--- a/packages/kit/src/core/config/options.js
+++ b/packages/kit/src/core/config/options.js
@@ -161,7 +161,7 @@ const options = object(
 
 					if (input !== '' && (input.endsWith('/') || !input.startsWith('/'))) {
 						throw new Error(
-							`${keypath} option must either be the empty string, or a root-relative path that starts but doesn't end with '/'. See https://kit.svelte.dev/docs/configuration#paths`
+							`${keypath} option must either be the empty string or a root-relative path that starts but doesn't end with '/'. See https://kit.svelte.dev/docs/configuration#paths`
 						);
 					}
 
diff --git a/packages/kit/test/apps/amp/svelte.config.js b/packages/kit/test/apps/amp/svelte.config.js
index 5fe016e42d3d..a0902eb13f36 100644
--- a/packages/kit/test/apps/amp/svelte.config.js
+++ b/packages/kit/test/apps/amp/svelte.config.js
@@ -1,7 +1,14 @@
 /** @type {import('@sveltejs/kit').Config} */
 const config = {
 	kit: {
-		amp: true
+		amp: true,
+		vite: {
+			server: {
+				// TODO: required to support ipv6, remove on vite 3
+				// https://github.com/vitejs/vite/issues/7075
+				host: 'localhost'
+			}
+		}
 	}
 };
 
diff --git a/packages/kit/test/apps/basics/svelte.config.js b/packages/kit/test/apps/basics/svelte.config.js
index 40df6e81dd84..68b1411a1fdc 100644
--- a/packages/kit/test/apps/basics/svelte.config.js
+++ b/packages/kit/test/apps/basics/svelte.config.js
@@ -17,6 +17,9 @@ const config = {
 				include: ['cookie', 'marked']
 			},
 			server: {
+				// TODO: required to support ipv6, remove on vite 3
+				// https://github.com/vitejs/vite/issues/7075
+				host: 'localhost',
 				fs: {
 					allow: [path.resolve('../../../src')]
 				}
diff --git a/packages/kit/test/apps/options-2/svelte.config.js b/packages/kit/test/apps/options-2/svelte.config.js
index b8c2c561074e..8160cdf0cb8f 100644
--- a/packages/kit/test/apps/options-2/svelte.config.js
+++ b/packages/kit/test/apps/options-2/svelte.config.js
@@ -11,6 +11,9 @@ const config = {
 		},
 		vite: {
 			server: {
+				// TODO: required to support ipv6, remove on vite 3
+				// https://github.com/vitejs/vite/issues/7075
+				host: 'localhost',
 				fs: {
 					allow: [path.resolve('../../../src')]
 				}
diff --git a/packages/kit/test/apps/options/svelte.config.js b/packages/kit/test/apps/options/svelte.config.js
index a882a9b5664c..569ef37d3af6 100644
--- a/packages/kit/test/apps/options/svelte.config.js
+++ b/packages/kit/test/apps/options/svelte.config.js
@@ -28,6 +28,9 @@ const config = {
 			},
 			clearScreen: false,
 			server: {
+				// TODO: required to support ipv6, remove on vite 3
+				// https://github.com/vitejs/vite/issues/7075
+				host: 'localhost',
 				fs: {
 					allow: [path.resolve('../../../src')]
 				}