diff --git a/packages/signaling/src/index.ts b/packages/signaling/src/index.ts
index dfb28369b..996192301 100644
--- a/packages/signaling/src/index.ts
+++ b/packages/signaling/src/index.ts
@@ -345,9 +345,9 @@ export namespace Signal {
 /**
  * A stream with the characteristics of a signal and an async iterator.
  */
-  export class Stream<T, U>
-    extends Signal<T, U>
-    implements AsyncIterableIterator<U>
+export class Stream<T, U>
+  extends Signal<T, U>
+  implements AsyncIterableIterator<U>
 {
   /**
    * Return an async iterator that yields every emission.
diff --git a/packages/signaling/tests/src/index.spec.ts b/packages/signaling/tests/src/index.spec.ts
index b930e9c1c..7314e0a54 100644
--- a/packages/signaling/tests/src/index.spec.ts
+++ b/packages/signaling/tests/src/index.spec.ts
@@ -593,7 +593,7 @@ describe('@lumino/signaling', () => {
         expected.split('').forEach(x => setTimeout(() => stream.emit(x)));
         setTimeout(() => stream.block(() => stream.emit('BLOCKED EMISSION 2')));
         for await (const letter of stream) {
-          emitted = emitted.concat(letter)
+          emitted = emitted.concat(letter);
           if (emitted === expected) break;
         }
       });