diff --git a/workflow/inproc/context.go b/workflow/inproc/context.go
index 9c1fab60..7e58ba22 100644
--- a/workflow/inproc/context.go
+++ b/workflow/inproc/context.go
@@ -616,10 +616,10 @@ func (proc *runnerContext) yieldOutput(ctx context.Context, executorID string, o
 		return fmt.Errorf("executor %q cannot output object of type %s; expected one of %v", executorID, reflect.TypeOf(output), expectedTypes)
 	}
 
-	tags, ok := proc.outputFilter.tryGetTags(executorID)
-	if !ok {
+	if !proc.outputFilter.canOutput(executorID, output) {
 		return nil
 	}
+	tags, _ := proc.outputFilter.tryGetTags(executorID)
 	return proc.addEvent(ctx, workflow.OutputEvent{
 		ExecutorID: executorID,
 		Output:     output,
diff --git a/workflow/inproc/outputfilter.go b/workflow/inproc/outputfilter.go
index 82d33cdf..7f8110b3 100644
--- a/workflow/inproc/outputfilter.go
+++ b/workflow/inproc/outputfilter.go
@@ -19,6 +19,14 @@ func newOutputFilter(wf *workflow.Workflow) *outputFilter {
 	return &outputFilter{tagsByExecutor: wf.OutputExecutors()}
 }
 
+func (f *outputFilter) canOutput(executorID string, _ any) bool {
+	if f == nil {
+		return false
+	}
+	_, ok := f.tagsByExecutor[executorID]
+	return ok
+}
+
 func (f *outputFilter) tryGetTags(executorID string) ([]workflow.OutputTag, bool) {
 	if f == nil {
 		return nil, false