diff --git a/packages/prover/test/unit/proof_provider/payload_store.test.ts b/packages/prover/test/unit/proof_provider/payload_store.test.ts
index b482bb579e77..1557805f31bb 100644
--- a/packages/prover/test/unit/proof_provider/payload_store.test.ts
+++ b/packages/prover/test/unit/proof_provider/payload_store.test.ts
@@ -4,7 +4,7 @@ import {ApiClient, ApiResponse, HttpStatusCode, routes} from "@lodestar/api";
 import {hash} from "@lodestar/utils";
 import {Logger} from "@lodestar/logger";
 import {ExecutionPayload, SignedBeaconBlock, capella} from "@lodestar/types";
-import {toHexString} from "@lodestar/utils";
+import {toHexString} from "@lodestar/utils/browser";
 import {ForkName} from "@lodestar/params";
 import {PayloadStore} from "../../../src/proof_provider/payload_store.js";
 import {MAX_PAYLOAD_HISTORY} from "../../../src/constants.js";
diff --git a/packages/reqresp/test/unit/response/index.test.ts b/packages/reqresp/test/unit/response/index.test.ts
index 62a8e63f3fe0..90c66696dcac 100644
--- a/packages/reqresp/test/unit/response/index.test.ts
+++ b/packages/reqresp/test/unit/response/index.test.ts
@@ -1,6 +1,6 @@
 import {describe, it, expect, beforeEach, afterEach} from "vitest";
 import {PeerId} from "@libp2p/interface";
-import {LodestarError, fromHex} from "@lodestar/utils";
+import {LodestarError, fromHex} from "@lodestar/utils/node";
 import {getEmptyLogger} from "@lodestar/logger/empty";
 import {Protocol, RespStatus} from "../../../src/index.js";
 import {ReqRespRateLimiter} from "../../../src/rate_limiter/ReqRespRateLimiter.js";
diff --git a/packages/reqresp/test/utils/index.ts b/packages/reqresp/test/utils/index.ts
index afddace8328d..0cc94d359a5f 100644
--- a/packages/reqresp/test/utils/index.ts
+++ b/packages/reqresp/test/utils/index.ts
@@ -3,7 +3,7 @@ import {logger} from "@libp2p/logger";
 import {expect} from "vitest";
 import {Uint8ArrayList} from "uint8arraylist";
 import {toHexString} from "@chainsafe/ssz";
-import {fromHex} from "@lodestar/utils";
+import {fromHex} from "@lodestar/utils/node";
 import {ResponseIncoming, RespStatus} from "../../src/index.js";
 import {ResponseChunk} from "../fixtures/index.js";