diff --git a/.eslintrc.json b/.eslintrc.json
index 0c1359a..eb0d552 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -11,7 +11,7 @@
   "ignorePatterns": ["coverage"],
   "overrides": [
     {
-      "files": ["tests/**/*.js"],
+      "files": ["tests/**/*.js", "lib/**/*.spec.js"],
       "plugins": ["jest"],
       "extends": ["plugin:jest/recommended", "plugin:jest/style"],
       "rules": {
diff --git a/jest.config.json b/jest.config.json
index f1d3a30..fff6025 100644
--- a/jest.config.json
+++ b/jest.config.json
@@ -1,5 +1,11 @@
 {
   "collectCoverage": true,
+  "collectCoverageFrom": [
+    "**/*.{js,jsx}",
+    "!tests/fixtures/**",
+    "!**/node_modules/**",
+    "!**/coverage/**"
+  ],
   "coverageThreshold": {
     "global": {
       "statements": 100,
diff --git a/tests/regexs.test.js b/lib/helpers/regexs.spec.js
similarity index 97%
rename from tests/regexs.test.js
rename to lib/helpers/regexs.spec.js
index e348150..43e0be8 100644
--- a/tests/regexs.test.js
+++ b/lib/helpers/regexs.spec.js
@@ -1,10 +1,13 @@
+import {
+  invalidSemVers,
+  validSemVers,
+} from "../../tests/fixtures/regexs.fixture";
 import {
   allVersionRegexs,
   attributeVersionRegex,
   regularVersionRegex,
   semVerRegex,
-} from "../lib/helpers/regexs";
-import { invalidSemVers, validSemVers } from "./fixtures/regexs.fixture";
+} from "./regexs";
 
 describe("semVerRegex", () => {
   it("should match valid values", () => {
diff --git a/package.json b/package.json
index de9262c..3e3b5af 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,8 @@
     "node": ">=16.3.0"
   },
   "files": [
-    "lib"
+    "lib",
+    "!lib/**/*.spec.js"
   ],
   "keywords": [
     "hex",