diff --git a/src/execution/execute.ts b/src/execution/execute.ts
index be0323ca76..9c5f5b4dd4 100644
--- a/src/execution/execute.ts
+++ b/src/execution/execute.ts
@@ -170,7 +170,7 @@ export function execute(args: ExecutionArgs): PromiseOrValue<ExecutionResult> {
   const exeContext = buildExecutionContext(args);
 
   // Return early errors if execution context failed.
-  if (!('schema' in exeContext)) {
+  if (Array.isArray(exeContext)) {
     return { errors: exeContext };
   }
 
@@ -1090,7 +1090,7 @@ export function createSourceEventStream(
   const exeContext = buildExecutionContext(args);
 
   // Return early errors if execution context failed.
-  if (!('schema' in exeContext)) {
+  if (Array.isArray(exeContext)) {
     return { errors: exeContext };
   }