diff --git a/docs/recipes/flow.md b/docs/recipes/flow.md
index f94bf7e7f..d729182c9 100644
--- a/docs/recipes/flow.md
+++ b/docs/recipes/flow.md
@@ -15,7 +15,9 @@ We recommend you use AVA's built-in Babel pipeline to strip Flow type annotation
 	"ava": {
 		"babel": {
 			"testOptions": {
-				"plugins": ["@babel/plugin-transform-flow-strip-types"]
+				"plugins": [
+					"@babel/plugin-transform-flow-strip-types"
+				]
 			}
 		}
 	}
@@ -87,7 +89,7 @@ class CustomError extends Error {
 }
 
 function myFunc() {
-	throw new CustomError(TypeError('🙈'));
+	throw new CustomError(new TypeError('🙈'));
 };
 
 test('throws', t => {
diff --git a/docs/recipes/typescript.md b/docs/recipes/typescript.md
index 5c94749b2..29a1a283f 100644
--- a/docs/recipes/typescript.md
+++ b/docs/recipes/typescript.md
@@ -51,7 +51,7 @@ import test from 'ava';
 
 const fn = async () => Promise.resolve('foo');
 
-test(async (t) => {
+test(async t => {
 	t.is(await fn(), 'foo');
 });
 ```
@@ -153,7 +153,7 @@ class CustomError extends Error {
 }
 
 function myFunc() {
-	throw new CustomError(TypeError('🙈'));
+	throw new CustomError(new TypeError('🙈'));
 };
 
 test('throws', t => {