diff --git a/src/web/test/suite/documentHelpers.test.ts b/src/web/test/suite/documentHelpers.test.ts
index cb8323b..c9388e1 100644
--- a/src/web/test/suite/documentHelpers.test.ts
+++ b/src/web/test/suite/documentHelpers.test.ts
@@ -4,7 +4,9 @@ import { Range, TextDocument } from 'vscode';
 import { adjustedRangeWithMinimumIndentation, contentOfLinesWithAdjustedIndentation, endOfLineCharacter, linesForIndexes, minimumIndentationForLineIndexes } from '../../../lib/documentHelpers';
 
 const fixtureUri = (fileName: string) => {
-	const workspaceFolder = vscode.workspace.workspaceFolders![0];
+	const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
+	if (!workspaceFolder) { throw new Error('No workspace folder found'); }
+
 	return vscode.Uri.joinPath(workspaceFolder.uri, fileName);
 };
 
diff --git a/src/web/test/suite/textHelpers.test.ts b/src/web/test/suite/textHelpers.test.ts
index d3a994e..edd7969 100644
--- a/src/web/test/suite/textHelpers.test.ts
+++ b/src/web/test/suite/textHelpers.test.ts
@@ -6,7 +6,9 @@ import { generateCopyableText, generateSnippet, includeLanguageIdentifier, isMar
 import { ExtensionConfig } from '../../../types/config';
 
 const fixtureUri = (fileName: string) => {
-	const workspaceFolder = vscode.workspace.workspaceFolders![0];
+	const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
+	if (!workspaceFolder) { throw new Error('No workspace folder found'); }
+
 	return vscode.Uri.joinPath(workspaceFolder.uri, fileName);
 };