diff --git a/src/vs/workbench/services/dialogs/common/dialogService.ts b/src/vs/workbench/services/dialogs/common/dialogService.ts
index 95bd4a098da31..3e8cf74c09f7c 100644
--- a/src/vs/workbench/services/dialogs/common/dialogService.ts
+++ b/src/vs/workbench/services/dialogs/common/dialogService.ts
@@ -53,7 +53,7 @@ export class DialogService extends Disposable implements IDialogService {
 	prompt<T>(prompt: IPrompt<T>): Promise<IPromptResult<T>>;
 	async prompt<T>(prompt: IPrompt<T> | IPromptWithCustomCancel<T> | IPromptWithDefaultCancel<T>): Promise<IPromptResult<T> | IPromptResultWithCancel<T>> {
 		if (this.skipDialogs()) {
-			throw new Error('DialogService: refused to show dialog in tests.');
+			throw new Error(`DialogService: refused to show dialog in tests. Contents: ${prompt.message}`);
 		}
 
 		const handle = this.model.show({ promptArgs: { prompt } });