diff --git a/karma.conf.cjs b/karma.conf.cjs
index cc239b8..893bfde 100644
--- a/karma.conf.cjs
+++ b/karma.conf.cjs
@@ -50,7 +50,7 @@ module.exports = function (config) {
             type: "asset/resource",
           },
           {
-            test: /\.(js|ts|tsx)$/,
+            test: /\.(js|tsx?)$/,
             loader: "ts-loader",
             exclude: /node_modules|\.d\.ts$/,
             options: { configFile: "tsconfig.karma.json" },
diff --git a/src/const.ts b/src/constants.ts
similarity index 100%
rename from src/const.ts
rename to src/constants.ts
diff --git a/src/index.ts b/src/index.ts
index d2d837d..34e5f7e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,5 @@
 import { RLNDecoder, RLNEncoder } from "./codec.js";
-import { GOERLI_CONTRACT, RLN_ABI } from "./const.js";
+import { GOERLI_CONTRACT, RLN_ABI } from "./constants.js";
 import { Proof, RLNInstance } from "./rln.js";
 import { MembershipKey } from "./rln.js";
 import { RLNContract } from "./rln_contract.js";
diff --git a/src/rln_contract.ts b/src/rln_contract.ts
index 6f0e717..b9dc36c 100644
--- a/src/rln_contract.ts
+++ b/src/rln_contract.ts
@@ -1,6 +1,6 @@
 import { ethers } from "ethers";
 
-import { RLN_ABI } from "./const.js";
+import { RLN_ABI } from "./constants.js";
 import { RLNInstance } from "./rln.js";
 
 type Member = {