diff --git a/lib/fileOps.js b/lib/fileOps.js
index 6ce22672..65250fcf 100644
--- a/lib/fileOps.js
+++ b/lib/fileOps.js
@@ -40,7 +40,7 @@ var getNewestFile = function(dir, files, callback) {
 		}
 	});
 }
- 
+
 // get names of all directories in directory
 var getDirectoriesSync = function(srcpath) {
 	return fs.readdirSync(srcpath).filter(function (file) {
@@ -65,6 +65,9 @@ var deleteFolderRecursiveSync = function(path) {
 			}
 		});
 		fs.rmdirSync(path);
+		return true;
+	} else {
+		return false;
 	}
 };
 
diff --git a/lib/fileOps.spec.js b/lib/fileOps.spec.js
index 112e140e..77ffb249 100644
--- a/lib/fileOps.spec.js
+++ b/lib/fileOps.spec.js
@@ -1,5 +1,27 @@
 var assert = require('assert');
 var fileOps = require('./fileOps');
+var fs = require('fs');
+
+// create folders for testing
+if (!fs.existsSync("lib/test")){
+	fs.mkdirSync("lib/test");
+}
+if (!fs.existsSync("lib/test/folder")){
+	fs.mkdirSync("lib/test/folder");
+}
+if (!fs.existsSync("lib/test/another folder")){
+	fs.mkdirSync("lib/test/another folder");
+}
+if (!fs.existsSync("lib/test/file.txt")){
+	fs.writeFileSync("lib/test/file.txt", "contents");
+}
+if (!fs.existsSync("lib/test/another file.txt")){
+	fs.writeFileSync("lib/test/another file.txt", "more contents");
+}
+// we need this xfile to test a branch in fileOps.getNewestFile()s propagation
+if (!fs.existsSync("lib/test/xfile.txt")){
+	fs.writeFileSync("lib/test/xfile.txt", "contents");
+}
 
 describe("fileOps.js", function(){
 	describe("fileOps.getDirectoriesSync()", function(){
@@ -68,4 +90,17 @@ describe("fileOps.js", function(){
 			});
 		});
 	});
+	describe("fileOps.deleteFolderRecursiveSync(path)", function(){
+		it("deletes a folder and all files and folders in it", function(){
+			let x = fileOps.deleteFolderRecursiveSync("lib/test");
+			assert.throws(function(){
+				fs.statSync("lib/test");
+			}, Error);
+			assert(x);
+		});
+		it("returns false if you give it an invalid path", function(){
+			let x = fileOps.deleteFolderRecursiveSync("This isn't a real path");
+			assert(!x);
+		});
+	});
 });
diff --git a/lib/test/another file.txt b/lib/test/another file.txt
deleted file mode 100644
index e69de29b..00000000
diff --git a/lib/test/file.txt b/lib/test/file.txt
deleted file mode 100644
index e69de29b..00000000
diff --git a/package.json b/package.json
index 0fb72b3f..012ddf23 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,8 @@
   "scripts": {
     "test": "npm run test-unit",
     "test-unit": "SET NODE_ENV=test && mocha --recursive \"./{,!(node_modules)/**/}*.spec.js\" || echo .",
-    "start": "echo Run node client.js start [instance] to start slaves && node master.js"
+    "start": "echo Run node client.js start [instance] to start slaves && node master.js",
+    "cover": "./node_modules/.bin/istanbul cover ./node_modules/mocha/bin/_mocha -- lib/*.js -R spec"
   },
   "keywords": [
     "factorio"
@@ -40,6 +41,7 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
+    "istanbul": "^0.4.5",
     "mocha": "^3.4.1",
     "mock-fs": "^4.3.0"
   }