diff --git a/extensions/typescript-language-features/src/languageFeatures/semanticTokens.ts b/extensions/typescript-language-features/src/languageFeatures/semanticTokens.ts
index a64f2cc9be471953b990fd3636ade519afd6ccb9..c19af5b6fb0d179012132f2763a27485a4b70dc4 100644
--- a/extensions/typescript-language-features/src/languageFeatures/semanticTokens.ts
+++ b/extensions/typescript-language-features/src/languageFeatures/semanticTokens.ts
@@ -95,7 +95,7 @@ class DocumentSemanticTokensProvider implements vscode.DocumentSemanticTokensPro
 			// as the new request will come in right after our response, we first wait for the document activity to stop
 			await waitForDocumentChangesToEnd(document);
 
-			throw new Error('busy');
+			throw new vscode.CancellationError();
 		}
 
 		const tokenSpan = response.body.spans;
diff --git a/src/vs/editor/common/services/modelServiceImpl.ts b/src/vs/editor/common/services/modelServiceImpl.ts
index 17d9d01596f11d6fbd72be29a6cf190bc6e99154..0c414a32445148e3dff79abb59a4b9a58bf743af 100644
--- a/src/vs/editor/common/services/modelServiceImpl.ts
+++ b/src/vs/editor/common/services/modelServiceImpl.ts
@@ -807,7 +807,8 @@ class ModelSemanticColoring extends Disposable {
 			contentChangeListener.dispose();
 			this._setDocumentSemanticTokens(provider, res || null, styling, pendingChanges);
 		}, (err) => {
-			if (!err || typeof err.message !== 'string' || err.message.indexOf('busy') === -1) {
+			const isExpectedError = err && (errors.isPromiseCanceledError(err) || (typeof err.message === 'string' && err.message.indexOf('busy') !== -1));
+			if (!isExpectedError) {
 				errors.onUnexpectedError(err);
 			}
 
diff --git a/src/vs/workbench/api/common/extHostLanguageFeatures.ts b/src/vs/workbench/api/common/extHostLanguageFeatures.ts
index 49cde88e19c1dc19a8a068cadde44bb1929f6645..09f71a4dd79cbda628740edebdb7abd004fc3b81 100644
--- a/src/vs/workbench/api/common/extHostLanguageFeatures.ts
+++ b/src/vs/workbench/api/common/extHostLanguageFeatures.ts
@@ -32,6 +32,7 @@ import { IdGenerator } from 'vs/base/common/idGenerator';
 import { IExtHostApiDeprecationService } from 'vs/workbench/api/common/extHostApiDeprecationService';
 import { Cache } from './cache';
 import { StopWatch } from 'vs/base/common/stopwatch';
+import { CancellationError } from 'vs/base/common/errors';
 
 // --- adapter
 
@@ -1403,7 +1404,7 @@ export class ExtHostLanguageFeatures implements extHostProtocol.ExtHostLanguageF
 		return ExtHostLanguageFeatures._handlePool++;
 	}
 
-	private _withAdapter<A, R>(handle: number, ctor: { new(...args: any[]): A; }, callback: (adapter: A, extension: IExtensionDescription | undefined) => Promise<R>, fallbackValue: R): Promise<R> {
+	private _withAdapter<A, R>(handle: number, ctor: { new(...args: any[]): A; }, callback: (adapter: A, extension: IExtensionDescription | undefined) => Promise<R>, fallbackValue: R, allowCancellationError: boolean = false): Promise<R> {
 		const data = this._adapter.get(handle);
 		if (!data) {
 			return Promise.resolve(fallbackValue);
@@ -1421,8 +1422,11 @@ export class ExtHostLanguageFeatures implements extHostProtocol.ExtHostLanguageF
 				Promise.resolve(p).then(
 					() => this._logService.trace(`[${extension.identifier.value}] provider DONE after ${Date.now() - t1}ms`),
 					err => {
-						this._logService.error(`[${extension.identifier.value}] provider FAILED`);
-						this._logService.error(err);
+						const isExpectedError = allowCancellationError && (err instanceof CancellationError);
+						if (!isExpectedError) {
+							this._logService.error(`[${extension.identifier.value}] provider FAILED`);
+							this._logService.error(err);
+						}
 					}
 				);
 			}
@@ -1711,7 +1715,7 @@ export class ExtHostLanguageFeatures implements extHostProtocol.ExtHostLanguageF
 	}
 
 	$provideDocumentSemanticTokens(handle: number, resource: UriComponents, previousResultId: number, token: CancellationToken): Promise<VSBuffer | null> {
-		return this._withAdapter(handle, DocumentSemanticTokensAdapter, adapter => adapter.provideDocumentSemanticTokens(URI.revive(resource), previousResultId, token), null);
+		return this._withAdapter(handle, DocumentSemanticTokensAdapter, adapter => adapter.provideDocumentSemanticTokens(URI.revive(resource), previousResultId, token), null, true);
 	}
 
 	$releaseDocumentSemanticTokens(handle: number, semanticColoringResultId: number): void {
@@ -1725,7 +1729,7 @@ export class ExtHostLanguageFeatures implements extHostProtocol.ExtHostLanguageF
 	}
 
 	$provideDocumentRangeSemanticTokens(handle: number, resource: UriComponents, range: IRange, token: CancellationToken): Promise<VSBuffer | null> {
-		return this._withAdapter(handle, DocumentRangeSemanticTokensAdapter, adapter => adapter.provideDocumentRangeSemanticTokens(URI.revive(resource), range, token), null);
+		return this._withAdapter(handle, DocumentRangeSemanticTokensAdapter, adapter => adapter.provideDocumentRangeSemanticTokens(URI.revive(resource), range, token), null, true);
 	}
 
 	//#endregion