diff --git a/yarn-project/noir-private-kernel/package.json b/yarn-project/noir-private-kernel/package.json
index d44ae2ea461..48a53d4e633 100644
--- a/yarn-project/noir-private-kernel/package.json
+++ b/yarn-project/noir-private-kernel/package.json
@@ -22,7 +22,7 @@
   "jest": {
     "preset": "ts-jest/presets/default-esm",
     "moduleNameMapper": {
-      "^(\\.{1,2}/.*)\\.m?js$": "$1"
+      "^(\\.{1,2}/.*)\\.[cm]?js$": "$1"
     },
     "testRegex": "./src/.*\\.test\\.(js|mjs|ts)$",
     "rootDir": "./src"