diff --git a/Tone/core/context/BaseContext.ts b/Tone/core/context/BaseContext.ts
index 7587bb7c..d5625d0e 100644
--- a/Tone/core/context/BaseContext.ts
+++ b/Tone/core/context/BaseContext.ts
@@ -104,7 +104,7 @@ export abstract class BaseContext
 
 	abstract get rawContext(): AnyAudioContext;
 
-	abstract async addAudioWorkletModule(
+	abstract addAudioWorkletModule(
 		_url: string,
 		_name: string
 	): Promise<void>;
diff --git a/Tone/core/context/Context.test.ts b/Tone/core/context/Context.test.ts
index 4481cba7..83e1dffd 100644
--- a/Tone/core/context/Context.test.ts
+++ b/Tone/core/context/Context.test.ts
@@ -116,7 +116,7 @@ describe("Context", () => {
 				}
 			});
 			await context.resume();
-			await new Promise((done) => setTimeout(() => done(), 10));
+			await new Promise<void>((done) => setTimeout(() => done(), 10));
 			expect(triggerChange).to.equal(true);
 			context.dispose();
 			return ac.close();
diff --git a/Tone/core/context/ToneAudioNode.ts b/Tone/core/context/ToneAudioNode.ts
index f5fa069b..c34c1943 100644
--- a/Tone/core/context/ToneAudioNode.ts
+++ b/Tone/core/context/ToneAudioNode.ts
@@ -27,7 +27,7 @@ export abstract class ToneAudioNode<Options extends ToneAudioNodeOptions = ToneA
 	/**
 	 * The name of the class
 	 */
-	abstract readonly name: string = "ToneAudioNode";
+	abstract readonly name: string;
 
 	/**
 	 * The input node or nodes. If the object is a source,
diff --git a/Tone/instrument/DuoSynth.ts b/Tone/instrument/DuoSynth.ts
index f0ec39d9..47d4f0d7 100644
--- a/Tone/instrument/DuoSynth.ts
+++ b/Tone/instrument/DuoSynth.ts
@@ -177,7 +177,7 @@ export class DuoSynth extends Monophonic<DuoSynthOptions> {
 						release: 0.5
 					}
 				}),
-		}) as DuoSynthOptions;
+		}) as unknown as DuoSynthOptions;
 	}
 	/**
 	 * Trigger the attack portion of the note