diff --git a/src/features/PesterTests.ts b/src/features/PesterTests.ts
index bd11d319eb..0486c7323a 100644
--- a/src/features/PesterTests.ts
+++ b/src/features/PesterTests.ts
@@ -144,6 +144,6 @@ export class PesterTestsFeature implements vscode.Disposable {
         // Ensure the necessary script exists (for testing). The debugger will
         // start regardless, but we also pass its success along.
         return utils.fileExists(this.invokePesterStubScriptPath)
-            && vscode.debug.startDebugging(vscode.workspace.workspaceFolders[0], launchConfig);
+            && vscode.debug.startDebugging(vscode.workspace.workspaceFolders?.[0], launchConfig);
     }
 }
diff --git a/src/features/RunCode.ts b/src/features/RunCode.ts
index 72cda68976..288a7b1295 100644
--- a/src/features/RunCode.ts
+++ b/src/features/RunCode.ts
@@ -49,7 +49,7 @@ export class RunCodeFeature implements vscode.Disposable {
             this.sessionManager.getSessionDetails());
 
         // TODO: Update to handle multiple root workspaces.
-        vscode.debug.startDebugging(vscode.workspace.workspaceFolders[0], launchConfig);
+        vscode.debug.startDebugging(vscode.workspace.workspaceFolders?.[0], launchConfig);
     }
 }