diff --git a/package.json b/package.json
index 5ef42c7..40dd260 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
 		"@types/node": "^10.12.10",
 		"@types/tempy": "^0.2.0",
 		"@types/zen-observable": "^0.8.0",
-		"ava": "*",
+		"ava": "^0.25.0",
 		"del-cli": "^1.1.0",
 		"jsdom": "^11.6.2",
 		"rxjs": "^6.3.3",
diff --git a/source/tests/test.ts b/source/tests/test.ts
index 98cb287..3dd2f59 100644
--- a/source/tests/test.ts
+++ b/source/tests/test.ts
@@ -681,8 +681,9 @@ test('is.class', t => {
 });
 
 test('is.typedArray', t => {
-	// Typescript currently does not support empty constructors for these
+	// TypeScript currently does not support empty constructors for these
 	// See https://github.com/Microsoft/TypeScript/issues/19680
+	// TODO: Remove the `0` when targeting `es2017` (Node.js 8), in other places of this file too.
 	const typedArrays = [
 		new Int8Array(0),
 		new Uint8Array(0),