diff --git a/.travis.yml b/.travis.yml
index f3fa8cd..f98fed0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 language: node_js
 node_js:
+  - '12'
   - '10'
   - '8'
diff --git a/package.json b/package.json
index f9c833a..da8facb 100644
--- a/package.json
+++ b/package.json
@@ -34,9 +34,9 @@
 		"p-map": "^3.0.0"
 	},
 	"devDependencies": {
-		"ava": "^1.4.1",
+		"ava": "^2.2.0",
 		"delay": "^4.1.0",
-		"in-range": "^1.0.0",
+		"in-range": "^2.0.0",
 		"time-span": "^3.0.0",
 		"tsd": "^0.7.1",
 		"xo": "^0.24.0"
diff --git a/readme.md b/readme.md
index 0a2d45f..ba2db46 100644
--- a/readme.md
+++ b/readme.md
@@ -104,7 +104,7 @@ const runJob = PProgress.fn(async (name, progress) => {
 })();
 ```
 
-### PProgress.all(promises, [options])
+### PProgress.all(promises, options?)
 
 Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress `0` when pending and progress `1` when resolved. For `PProgress` type promises, it listens to their `onProgress()` method for more fine grained progress reporting. You can mix and match normal promises and `PProgress` promises.
 
@@ -152,7 +152,7 @@ Array of promises or promise-returning functions, similar to [p-all](https://git
 
 #### options
 
-Type: `Object`
+Type: `object`
 
 ##### concurrency
 
@@ -171,8 +171,3 @@ When this option is set, the first argument must be an array of promise-returnin
 
 - [p-cancelable](https://github.com/sindresorhus/p-cancelable) - Create a promise that can be canceled
 - [More…](https://github.com/sindresorhus/promise-fun)
-
-
-## License
-
-MIT © [Sindre Sorhus](https://sindresorhus.com)
diff --git a/test.js b/test.js
index 2d14934..4059c74 100644
--- a/test.js
+++ b/test.js
@@ -143,5 +143,8 @@ test('PProgress.all() with concurrency = 1', async t => {
 		fixture
 	]);
 
-	t.true(inRange(end(), 200 /* 4 delays of 50ms each */, 250 /* reasonable padding */));
+	t.true(inRange(end(), {
+		start: 200, // 4 delays of 50ms each
+		end: 250 // Reasonable padding
+	}));
 });