diff --git a/packages/@ember/-internals/meta/lib/meta.ts b/packages/@ember/-internals/meta/lib/meta.ts
index 87891713e77..d6ea5d286d0 100644
--- a/packages/@ember/-internals/meta/lib/meta.ts
+++ b/packages/@ember/-internals/meta/lib/meta.ts
@@ -259,7 +259,7 @@ export class Meta {
   _findInheritedMap(key: string, subkey: string): any | undefined {
     let pointer: Meta | null = this;
     while (pointer !== null) {
-      let map : Map<string, any> = pointer[key];
+      let map: Map<string, any> = pointer[key];
       if (map !== undefined) {
         let value = map.get(subkey);
         if (value !== undefined) {
@@ -741,7 +741,7 @@ export class Meta {
     return this._listeners;
   }
 
-  matchingListeners(eventName: string): (string | boolean | object | null)[] | undefined | void {
+  matchingListeners(eventName: string): (string | boolean | object | null)[] | undefined {
     let listeners = this.flattenedListeners();
     let result;
 
@@ -858,7 +858,7 @@ export function setMeta(obj: object, meta: Meta) {
   metaStore.set(obj, meta);
 }
 
-export function peekMeta(obj: object) : Meta | null {
+export function peekMeta(obj: object): Meta | null {
   assert('Cannot call `peekMeta` on null', obj !== null);
   assert('Cannot call `peekMeta` on undefined', obj !== undefined);
   assert(
diff --git a/packages/@ember/-internals/metal/lib/events.ts b/packages/@ember/-internals/metal/lib/events.ts
index 697d7bf269c..7f7c52b5a00 100644
--- a/packages/@ember/-internals/metal/lib/events.ts
+++ b/packages/@ember/-internals/metal/lib/events.ts
@@ -119,7 +119,8 @@ export function sendEvent(
 ) {
   if (actions === undefined) {
     let meta = _meta === undefined ? peekMeta(obj) : _meta;
-    actions = (typeof meta === 'object' && meta !== null) ? meta.matchingListeners(eventName) : undefined;
+    actions =
+      typeof meta === 'object' && meta !== null ? meta.matchingListeners(eventName) : undefined;
   }
 
   if (actions === undefined || actions.length === 0) {
diff --git a/packages/@ember/-internals/metal/lib/property_set.ts b/packages/@ember/-internals/metal/lib/property_set.ts
index e289e4ed3e9..76d07d44847 100644
--- a/packages/@ember/-internals/metal/lib/property_set.ts
+++ b/packages/@ember/-internals/metal/lib/property_set.ts
@@ -145,7 +145,9 @@ function setPath(root: object, path: string, value: any, tolerant?: boolean): an
   if (newRoot !== null && newRoot !== undefined) {
     return set(newRoot, keyName, value);
   } else if (!tolerant) {
-    throw new EmberError(`Property set failed: object in path "${parts.join('.')}" could not be found.`);
+    throw new EmberError(
+      `Property set failed: object in path "${parts.join('.')}" could not be found.`
+    );
   }
 }