diff --git a/.circleci/config.yml b/.circleci/config.yml
index 017eb18..58cee7d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -7,8 +7,10 @@ jobs:
       - checkout
       - run: npm install
       - run: npm run clean
-      - run: npm run test
+      - run: npm run coverage
       - run: npm run clean
+      - store_artifacts:
+          path: coverage
 
 workflows:
   version: 2
diff --git a/.gitignore b/.gitignore
index 13dfa36..bdc6281 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .env
-node_modules/
\ No newline at end of file
+node_modules/
+coverage/
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 43183a0..16b8956 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,35 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "ajv": {
+      "version": "6.10.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
+      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
+      "requires": {
+        "fast-deep-equal": "^2.0.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      }
+    },
+    "asn1": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
+      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
+      "requires": {
+        "safer-buffer": "~2.1.0"
+      }
+    },
+    "assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+    },
+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
+    },
     "aws-sdk": {
       "version": "2.451.0",
       "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.451.0.tgz",
@@ -20,16 +49,53 @@
         "xml2js": "0.4.19"
       }
     },
+    "aws-sign2": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
+    },
+    "aws4": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
+      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
+    },
+    "balanced-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
+    },
     "base64-js": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
       "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
     },
+    "bcrypt-pbkdf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
+      "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
+      "requires": {
+        "tweetnacl": "^0.14.3"
+      }
+    },
     "bluebird": {
       "version": "3.5.4",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.4.tgz",
       "integrity": "sha512-FG+nFEZChJrbQ9tIccIfZJBz3J7mLrAhxakAbnrJWn8d7aKOC+LWifa0G+p4ZqKp4y13T7juYvdhq9NzKdsrjw=="
     },
+    "brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "requires": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw=="
+    },
     "buffer": {
       "version": "4.9.1",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
@@ -40,53 +106,587 @@
         "isarray": "^1.0.0"
       }
     },
+    "caseless": {
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+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
+    },
+    "codacy-coverage": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/codacy-coverage/-/codacy-coverage-3.4.0.tgz",
+      "integrity": "sha512-A0ats3/gZtOw76muu++HZ6QrInztWjjLefkLJmmBpjPfyn6nNwNLoApmGmj3F3dfgl2+o6u5GwPnUBkKdfKXTQ==",
+      "requires": {
+        "bluebird": "^3.5.x",
+        "commander": "^2.x",
+        "jacoco-parse": "^2.x",
+        "joi": "^13.x",
+        "lcov-parse": "^1.x",
+        "lodash": "^4.17.4",
+        "log-driver": "^1.x",
+        "request": "^2.88.0",
+        "request-promise": "^4.x"
+      }
+    },
+    "combined-stream": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
+      "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+      "requires": {
+        "delayed-stream": "~1.0.0"
+      }
+    },
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+      "version": "2.20.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
+      "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ=="
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+      "version": "0.0.1",
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+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
+      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
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+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
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     "url": {
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@@ -101,6 +701,21 @@
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     },
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+      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "requires": {
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+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
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diff --git a/package.json b/package.json
index 73d1e66..b6c7d16 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "test": "node ./test.js",
-    "clean": "node ./clean.js"
+    "clean": "node ./clean.js",
+    "coverage": "istanbul cover ./test.js"
   },
   "repository": {
     "type": "git",
@@ -28,7 +29,8 @@
   "homepage": "https://github.com/cderche/greenlock-storage-s3#readme",
   "dependencies": {
     "aws-sdk": "^2.451.0",
-    "bluebird": "^3.5.4"
+    "bluebird": "^3.5.4",
+    "codacy-coverage": "^3.4.0"
   },
   "devDependencies": {
     "dotenv": "^8.0.0",