diff --git a/.gitignore b/.gitignore
index 21cef60..a875245 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 lib/
 node_modules/
 packages/*/README.md
-*.log
\ No newline at end of file
+*.log
+coverage
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b1f493e
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1755 @@
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+}
diff --git a/package.json b/package.json
index 42273f0..32350e8 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,12 @@
 {
   "name": "deepdrain",
-  "version": "1.1.1",
+  "version": "1.1.3",
   "description": "Library for accessing arbitrarily nested, possibly nullable properties on a JavaScript object or array.",
   "main": "src/index.js",
   "scripts": {
-    "test": "mocha src/index.test.js"
+    "test": "istanbul cover -x *.test.js _mocha -- -R spec src/index.test.js",
+    "test:watch": "mocha src/index.test.js -w",
+    "test:check-coverage": "istanbul check-coverage --statement 95 --functions 100 --lines 95"
   },
   "repository": {
     "type": "git",
@@ -19,6 +21,7 @@
   "dependencies": {},
   "devDependencies": {
     "chai": "^4.1.2",
+    "istanbul": "^0.4.5",
     "mocha": "^5.0.1",
     "prettier-eslint": "^8.8.1"
   }