diff --git a/e2e/e2e.test.mts b/e2e/e2e.test.mts
index bbc504e..a8f4232 100644
--- a/e2e/e2e.test.mts
+++ b/e2e/e2e.test.mts
@@ -23,8 +23,8 @@ import {
 	it,
 } from 'vitest'
 
-import { generateSRIHash } from '../src/core.mjs'
-import { doesFileExist } from '../src/fs.mjs'
+import { generateSRIHash } from '#as/core.mjs'
+import { doesFileExist } from '#as/fs.mjs'
 
 const execFile = promisify(_execFile)
 
@@ -261,7 +261,7 @@ describe('middleware', () => {
 	afterEach(cleanServer)
 	afterAll(cleanServer) // Just in case
 
-	const checkHtmlIsPatched = async path => {
+	const checkHtmlIsPatched = async (path: string) => {
 		const response = await fetch(urlBase + path)
 		const content = await response.text()
 		return _checkHtmlIsPatched(content)
diff --git a/package.json b/package.json
index bd07a60..06bad8a 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,9 @@
 			"default": "./src/state.mjs"
 		}
 	},
+	"imports": {
+		"#as/*": "./src/*"
+	},
 	"files": ["src/*"],
 	"scripts": {
 		"format": "biome format --write .",
diff --git a/tests/core.test.mts b/tests/core.test.mts
index dbc4d73..1280ce9 100644
--- a/tests/core.test.mts
+++ b/tests/core.test.mts
@@ -17,8 +17,8 @@ import {
 	sriHashesEqual,
 	updateDynamicPageSriHashes,
 	updateStaticPageSriHashes,
-} from '../src/core.mjs'
-import { doesFileExist } from '../src/fs.mjs'
+} from '#as/core.mjs'
+import { doesFileExist } from '#as/fs.mjs'
 
 type SriHashes = {
 	scripts: Record<string, string>
@@ -198,7 +198,7 @@ describe('generateSRIHash', () => {
 			'sha256-TWupyvVdPa1DyFqLnQMqRpuUWdS3nKPnz70IcS/1o3Q=',
 		],
 		['', 'sha256-47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU='],
-	]
+	] as const
 
 	it.each(cases)(
 		'generates correct hash for utf8 strings',
diff --git a/tests/fs.test.mts b/tests/fs.test.mts
index c3ce5d1..d68c34b 100644
--- a/tests/fs.test.mts
+++ b/tests/fs.test.mts
@@ -9,9 +9,9 @@ import { relative, resolve } from 'node:path'
 
 import { describe, expect, it } from 'vitest'
 
-import type { HashesCollection } from '../src/core.mjs'
-import { generateSRIHash } from '../src/core.mjs'
-import { doesFileExist, scanDirectory } from '../src/fs.mjs'
+import type { HashesCollection } from '#as/core.mjs'
+import { generateSRIHash } from '#as/core.mjs'
+import { doesFileExist, scanDirectory } from '#as/fs.mjs'
 
 const testsDir = new URL('.', import.meta.url).pathname
 
diff --git a/tests/main.test.mts b/tests/main.test.mts
index 8188c1b..2395a91 100644
--- a/tests/main.test.mts
+++ b/tests/main.test.mts
@@ -7,7 +7,7 @@
 import type { AstroIntegration } from 'astro'
 import { describe, expect, it } from 'vitest'
 
-import defaultIntegrationExport, { shield } from '../src/main.mjs'
+import defaultIntegrationExport, { shield } from '#as/main.mjs'
 
 describe('sriCSP', () => {
 	it('is exported as default', () => {
@@ -17,7 +17,7 @@ describe('sriCSP', () => {
 
 	const checkIntegration = (
 		integration: AstroIntegration,
-		keys = ['astro:build:done'],
+		keys: (keyof AstroIntegration['hooks'])[] = ['astro:build:done' as const],
 	) => {
 		expect(Object.keys(integration).sort()).toEqual(['hooks', 'name'])
 		expect(integration.name).toBe('@kindspells/astro-shield')
diff --git a/tests/state.test.mts b/tests/state.test.mts
index 3dca47e..816303f 100644
--- a/tests/state.test.mts
+++ b/tests/state.test.mts
@@ -6,7 +6,7 @@
 
 import { describe, expect, it } from 'vitest'
 
-import { getGlobalHashes } from '../src/state.mjs'
+import { getGlobalHashes } from '#as/state.mjs'
 
 describe('getGlobalHashes', () => {
 	it('returns a singleton', () => {
diff --git a/tsconfig.json b/tsconfig.json
index 7d6cfc0..5fd7cc3 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -33,12 +33,8 @@
 		"skipLibCheck": true
 	},
 	"include": [
-		"*.mjs",
-		"*.d.ts",
-		"*.ts",
-		"src/core.mjs",
-		"src/main.mjs",
-		"src/state.mjs",
-		"src/main.d.ts"
+		"src/*",
+		"tests/**/*.mts",
+		"e2e/**/*.mts"
 	]
 }