diff --git a/deno.json b/deno.json
index 4b850fa14..32a1dea61 100644
--- a/deno.json
+++ b/deno.json
@@ -18,6 +18,7 @@
   "imports": {
     "@deno/dnt": "jsr:@deno/dnt@^0.41.3",
     "@std/assert": "jsr:@std/assert@^1.0.3",
+    "@std/path": "jsr:@std/path@^1.0.3",
     "@std/testing": "jsr:@std/testing@^1.0.0"
   },
   "fmt": {
diff --git a/deno.lock b/deno.lock
index b7cd79b21..bb949fefd 100644
--- a/deno.lock
+++ b/deno.lock
@@ -245,6 +245,7 @@
     "dependencies": [
       "jsr:@deno/dnt@^0.41.3",
       "jsr:@std/assert@^1.0.3",
+      "jsr:@std/path@^1.0.3",
       "jsr:@std/testing@^1.0.0"
     ],
     "members": {
diff --git a/packages/core/test/utils.ts b/packages/core/test/utils.ts
index ca9940c12..68cad7121 100644
--- a/packages/core/test/utils.ts
+++ b/packages/core/test/utils.ts
@@ -2,7 +2,6 @@ import { KemId } from "../src/identifiers.ts";
 
 // deno-lint-ignore no-explicit-any
 export const isNode = () => (globalThis as any).process?.versions?.node != null;
-// export const isDeno = () => (globalThis as any).Deno?.version?.deno !== null;
 
 export function concat(a: Uint8Array, b: Uint8Array): Uint8Array {
   const ret = new Uint8Array(a.length + b.length);
@@ -11,13 +10,6 @@ export function concat(a: Uint8Array, b: Uint8Array): Uint8Array {
   return ret;
 }
 
-export function testVectorPath(): string {
-  if (isNode()) {
-    return "../../../../test/vectors";
-  }
-  return "./test/vectors";
-}
-
 export function hexToBytes(v: string): Uint8Array {
   if (v.length === 0) {
     return new Uint8Array([]);
diff --git a/packages/hpke-js/import_map.json b/packages/hpke-js/import_map.json
index 2db50a8db..9843e4027 100644
--- a/packages/hpke-js/import_map.json
+++ b/packages/hpke-js/import_map.json
@@ -7,6 +7,7 @@
     "@hpke/dhkem-x448": "npm:@hpke/dhkem-x448@^1.3.0",
     "@noble/hashes": "npm:@noble/hashes@^1.4.0",
     "@std/assert": "jsr:@std/assert@1.0.0",
+    "@std/path": "jsr:@std/path@^1.0.3",
     "@std/testing": "jsr:@std/testing@^1.0.0"
   }
 }
diff --git a/packages/hpke-js/test/cipherSuite.test.ts b/packages/hpke-js/test/cipherSuite.test.ts
index b07272654..fc40259e3 100644
--- a/packages/hpke-js/test/cipherSuite.test.ts
+++ b/packages/hpke-js/test/cipherSuite.test.ts
@@ -10,7 +10,8 @@ import {
 } from "@hpke/core";
 
 import { CipherSuite } from "../src/cipherSuite.ts";
-import { hexToBytes, isNode } from "../../core/test/utils.ts";
+import { hexToBytes } from "../../core/test/utils.ts";
+import { isNode } from "./utils.ts";
 
 describe("constructor", () => {
   // RFC9180 A.1.
diff --git a/packages/hpke-js/test/cipherSuiteBackwardCompat.test.ts b/packages/hpke-js/test/cipherSuiteBackwardCompat.test.ts
index 481d8c343..224258e1a 100644
--- a/packages/hpke-js/test/cipherSuiteBackwardCompat.test.ts
+++ b/packages/hpke-js/test/cipherSuiteBackwardCompat.test.ts
@@ -11,12 +11,9 @@ import { Aead, Kdf, Kem } from "../mod.ts"; // deprecated identifiers as the tes
 
 import { CipherSuite } from "../src/cipherSuite.ts";
 
-import {
-  concat,
-  hexToBytes,
-  isNode,
-  loadCrypto,
-} from "../../core/test/utils.ts";
+import { concat, hexToBytes, loadCrypto } from "../../core/test/utils.ts";
+
+import { isNode } from "./utils.ts";
 
 describe("CipherSuite(backward-compat)", () => {
   // RFC9180 A.1.
diff --git a/packages/hpke-js/test/cipherSuiteNative.test.ts b/packages/hpke-js/test/cipherSuiteNative.test.ts
index c96563d57..3ff3c7cd0 100644
--- a/packages/hpke-js/test/cipherSuiteNative.test.ts
+++ b/packages/hpke-js/test/cipherSuiteNative.test.ts
@@ -22,12 +22,9 @@ import { Chacha20Poly1305 } from "@hpke/chacha20poly1305";
 import { DhkemX25519HkdfSha256 } from "@hpke/dhkem-x25519";
 import { DhkemX448HkdfSha512 } from "@hpke/dhkem-x448";
 
-import {
-  concat,
-  hexToBytes,
-  isNode,
-  loadCrypto,
-} from "../../core/test/utils.ts";
+import { concat, hexToBytes, loadCrypto } from "../../core/test/utils.ts";
+
+import { isNode } from "./utils.ts";
 
 describe("constructor", () => {
   // RFC9180 A.1.
diff --git a/packages/hpke-js/test/conformance.test.ts b/packages/hpke-js/test/conformance.test.ts
index 6d74d8639..8011b5813 100644
--- a/packages/hpke-js/test/conformance.test.ts
+++ b/packages/hpke-js/test/conformance.test.ts
@@ -4,7 +4,7 @@ import type { ConformanceTester } from "./conformanceTester.ts";
 import type { TestVector } from "./testVector.ts";
 
 import { createConformanceTester } from "./conformanceTester.ts";
-import { isNode, testVectorPath } from "../../core/test/utils.ts";
+import { getPath, isNode } from "./utils.ts";
 
 describe("RFC9180 conformance", () => {
   let testVectors: TestVector[];
@@ -12,7 +12,9 @@ describe("RFC9180 conformance", () => {
 
   beforeAll(async () => {
     testVectors = JSON.parse(
-      await Deno.readTextFile(testVectorPath() + "/test-vectors.json"),
+      await Deno.readTextFile(
+        getPath("../../../test/vectors/test-vectors.json"),
+      ),
     );
     tester = await createConformanceTester();
   });
diff --git a/packages/hpke-js/test/dhkemPrimitives.test.ts b/packages/hpke-js/test/dhkemPrimitives.test.ts
index 06b339fcd..d67c485f3 100644
--- a/packages/hpke-js/test/dhkemPrimitives.test.ts
+++ b/packages/hpke-js/test/dhkemPrimitives.test.ts
@@ -6,7 +6,7 @@ import { HkdfSha256, X25519 } from "@hpke/dhkem-x25519";
 import { HkdfSha512, X448 } from "@hpke/dhkem-x448";
 
 import { HkdfSha384 } from "../src/kdfs/hkdfSha384.ts";
-import { isNode } from "../../core/test/utils.ts";
+import { isNode } from "./utils.ts";
 
 describe("derivePublicKey", () => {
   describe("with valid parameters", () => {
diff --git a/packages/hpke-js/test/kemContext.test.ts b/packages/hpke-js/test/kemContext.test.ts
index 696e99468..35aadc31c 100644
--- a/packages/hpke-js/test/kemContext.test.ts
+++ b/packages/hpke-js/test/kemContext.test.ts
@@ -11,7 +11,8 @@ import {
 import { DhkemP256HkdfSha256 } from "../src/kems/dhkemP256.ts";
 import { DhkemP384HkdfSha384 } from "../src/kems/dhkemP384.ts";
 import { DhkemP521HkdfSha512 } from "../src/kems/dhkemP521.ts";
-import { isNode, loadCrypto } from "../../core/test/utils.ts";
+import { loadCrypto } from "../../core/test/utils.ts";
+import { isNode } from "./utils.ts";
 
 import { DhkemX25519HkdfSha256 } from "@hpke/dhkem-x25519";
 import { DhkemX448HkdfSha512 } from "@hpke/dhkem-x448";
diff --git a/packages/hpke-js/test/keyValidationEc.test.ts b/packages/hpke-js/test/keyValidationEc.test.ts
index 60f29a794..1117e4647 100644
--- a/packages/hpke-js/test/keyValidationEc.test.ts
+++ b/packages/hpke-js/test/keyValidationEc.test.ts
@@ -4,7 +4,7 @@ import type { ConformanceTester } from "./conformanceTester.ts";
 import type { WycheproofTestVector } from "./testVector.ts";
 
 import { createConformanceTester } from "./conformanceTester.ts";
-import { isNode, testVectorPath } from "../../core/test/utils.ts";
+import { getPath, isNode } from "./utils.ts";
 
 describe("EC key validation", () => {
   let totalCount: number;
@@ -29,7 +29,7 @@ describe("EC key validation", () => {
       // Use test vectors quoted from https://github.com/google/wycheproof under Apache-2.0 license.
       const tv: WycheproofTestVector = JSON.parse(
         await Deno.readTextFile(
-          testVectorPath() + "/ecdh_secp256r1_ecpoint_test.json",
+          getPath("../../../test/vectors/ecdh_secp256r1_ecpoint_test.json"),
         ),
       );
 
@@ -54,7 +54,7 @@ describe("EC key validation", () => {
       // Use test vectors quoted from https://github.com/google/wycheproof under Apache-2.0 license.
       const tv: WycheproofTestVector = JSON.parse(
         await Deno.readTextFile(
-          testVectorPath() + "/ecdh_secp384r1_ecpoint_test.json",
+          getPath("../../../test/vectors/ecdh_secp384r1_ecpoint_test.json"),
         ),
       );
 
@@ -79,7 +79,7 @@ describe("EC key validation", () => {
       // Use test vectors quoted from https://github.com/google/wycheproof under Apache-2.0 license.
       const tv: WycheproofTestVector = JSON.parse(
         await Deno.readTextFile(
-          testVectorPath() + "/ecdh_secp521r1_ecpoint_test.json",
+          getPath("../../../test/vectors/ecdh_secp521r1_ecpoint_test.json"),
         ),
       );
 
diff --git a/packages/hpke-js/test/keyValidationX25519.test.ts b/packages/hpke-js/test/keyValidationX25519.test.ts
index 6cec38905..129d8a955 100644
--- a/packages/hpke-js/test/keyValidationX25519.test.ts
+++ b/packages/hpke-js/test/keyValidationX25519.test.ts
@@ -4,7 +4,7 @@ import type { ConformanceTester } from "./conformanceTester.ts";
 import type { WycheproofTestVector } from "./testVector.ts";
 
 import { createConformanceTester } from "./conformanceTester.ts";
-import { testVectorPath } from "../../core/test/utils.ts";
+import { getPath } from "./utils.ts";
 
 describe("X25519 key validation", () => {
   let totalCount: number;
@@ -24,7 +24,9 @@ describe("X25519 key validation", () => {
     it("should validate properly", async () => {
       // Use test vectors quoted from https://github.com/google/wycheproof under Apache-2.0 license.
       const tv: WycheproofTestVector = JSON.parse(
-        await Deno.readTextFile(testVectorPath() + "/x25519_test.json"),
+        await Deno.readTextFile(
+          getPath("../../../test/vectors/x25519_test.json"),
+        ),
       );
 
       totalCount += tv.testGroups[0].tests.length;
diff --git a/packages/hpke-js/test/keyValidationX448.test.ts b/packages/hpke-js/test/keyValidationX448.test.ts
index 147b748e5..00f7901c1 100644
--- a/packages/hpke-js/test/keyValidationX448.test.ts
+++ b/packages/hpke-js/test/keyValidationX448.test.ts
@@ -4,7 +4,7 @@ import type { ConformanceTester } from "./conformanceTester.ts";
 import type { WycheproofTestVector } from "./testVector.ts";
 
 import { createConformanceTester } from "./conformanceTester.ts";
-import { testVectorPath } from "../../core/test/utils.ts";
+import { getPath } from "./utils.ts";
 
 describe("X448 key validation", () => {
   let totalCount: number;
@@ -24,7 +24,9 @@ describe("X448 key validation", () => {
     it("should validate properly", async () => {
       // Use test vectors quoted from https://github.com/google/wycheproof under Apache-2.0 license.
       const tv: WycheproofTestVector = JSON.parse(
-        await Deno.readTextFile(testVectorPath() + "/x448_test.json"),
+        await Deno.readTextFile(
+          getPath("../../../test/vectors/x448_test.json"),
+        ),
       );
 
       totalCount += tv.testGroups[0].tests.length;
diff --git a/packages/hpke-js/test/sample.test.ts b/packages/hpke-js/test/sample.test.ts
index 2b08d802c..c47ed9267 100644
--- a/packages/hpke-js/test/sample.test.ts
+++ b/packages/hpke-js/test/sample.test.ts
@@ -11,7 +11,8 @@ import { DhkemP384HkdfSha384 } from "../src/kems/dhkemP384.ts";
 import { DhkemP521HkdfSha512 } from "../src/kems/dhkemP521.ts";
 import { HkdfSha384 } from "../src/kdfs/hkdfSha384.ts";
 
-import { concat, isNode, loadCrypto } from "../../core/test/utils.ts";
+import { concat, loadCrypto } from "../../core/test/utils.ts";
+import { isNode } from "./utils.ts";
 
 describe("README examples", () => {
   describe("Base mode with DhkemP256HkdfSha256/HkdfSha256/Aes128Gcm", () => {
diff --git a/packages/hpke-js/test/utils.ts b/packages/hpke-js/test/utils.ts
new file mode 100644
index 000000000..9761d84a1
--- /dev/null
+++ b/packages/hpke-js/test/utils.ts
@@ -0,0 +1,12 @@
+import { dirname, fromFileUrl, join } from "@std/path";
+
+// deno-lint-ignore no-explicit-any
+export const isNode = () => (globalThis as any).process?.versions?.node != null;
+
+export function getPath(name: string): string {
+  const currentPath = dirname(fromFileUrl(import.meta.url));
+  if (isNode()) {
+    return join(currentPath, "../../../", name);
+  }
+  return join(currentPath, name);
+}