diff --git a/packages/language-server/src/plugins/typescript/features/DiagnosticsProvider.ts b/packages/language-server/src/plugins/typescript/features/DiagnosticsProvider.ts
index 53181994b..dc6b61f81 100644
--- a/packages/language-server/src/plugins/typescript/features/DiagnosticsProvider.ts
+++ b/packages/language-server/src/plugins/typescript/features/DiagnosticsProvider.ts
@@ -84,16 +84,13 @@ export class DiagnosticsProviderImpl implements DiagnosticsProvider {
         const checkers = [lang.getSuggestionDiagnostics, lang.getSemanticDiagnostics];
 
         for (const checker of checkers) {
-            if (!cancellationToken) {
-                diagnostics.push(...checker.call(lang, tsDoc.filePath));
-                continue;
-            }
-
-            // wait a bit so the event loop can check for cancellation
-            // or let completion go first
-            await new Promise((resolve) => setTimeout(resolve, 10));
-            if (cancellationToken.isCancellationRequested) {
-                return [];
+            if (cancellationToken) {
+                // wait a bit so the event loop can check for cancellation
+                // or let completion go first
+                await new Promise((resolve) => setTimeout(resolve, 10));
+                if (cancellationToken.isCancellationRequested) {
+                    return [];
+                }
             }
             diagnostics.push(...checker.call(lang, tsDoc.filePath));
         }