diff --git a/index.js b/index.js
index f792b91..98ad806 100644
--- a/index.js
+++ b/index.js
@@ -17,7 +17,7 @@ class Conf {
 		const pkgPath = pkgUp.sync(parentDir);
 		opts = Object.assign({projectName: require(pkgPath).name}, opts);
 
-		if (!opts.projectName) {
+		if (!opts.projectName && !opts.cwd) {
 			throw new Error('Project name could not be inferred. Please specify the `projectName` option.');
 		}
 
diff --git a/readme.md b/readme.md
index be5ebfa..af39600 100644
--- a/readme.md
+++ b/readme.md
@@ -72,6 +72,8 @@ Default: System default [user config directory](https://github.com/sindresorhus/
 
 **You most likely don't need this.**
 
+Overrides `projectName`.
+
 The only use-case I can think of is having the config located in the app directory or on some external storage.
 
 ### Instance
diff --git a/test.js b/test.js
index d96d027..d2b1870 100644
--- a/test.js
+++ b/test.js
@@ -146,3 +146,18 @@ test('automatic `projectName` inference', t => {
 	t.true(conf.path.includes('conf'));
 	del.sync(conf.path, {force: true});
 });
+
+test.only('`cwd` option overrides `projectName` option', t => {
+	const cwd = tempfile();
+
+	let conf;
+	t.notThrows(() => {
+		conf = new Conf({cwd, projectName: ''});
+	});
+
+	t.true(conf.path.startsWith(cwd));
+	t.is(conf.get('foo'), undefined);
+	conf.set('foo', fixture);
+	t.is(conf.get('foo'), fixture);
+	del.sync(conf.path, {force: true});
+});