diff --git a/deeplabcut/gui/tabs/evaluate_network.py b/deeplabcut/gui/tabs/evaluate_network.py
index 7546187fe..4eb31b63e 100644
--- a/deeplabcut/gui/tabs/evaluate_network.py
+++ b/deeplabcut/gui/tabs/evaluate_network.py
@@ -214,7 +214,7 @@ def evaluate_network(self):
             image_dir = Path(self.root.project_folder) / eval_folder / f"LabeledImages_{scorer}"
             labeled_images = [str(p) for p in image_dir.rglob("*.png")]
             if len(labeled_images) > 0:
-                _ = launch_napari(image_dir)
+                _ = launch_napari(labeled_images)
 
     @Slot(Engine)
     def _on_engine_change(self, engine: Engine) -> None:
diff --git a/deeplabcut/gui/widgets.py b/deeplabcut/gui/widgets.py
index 855f69400..f8a1e4c93 100644
--- a/deeplabcut/gui/widgets.py
+++ b/deeplabcut/gui/widgets.py
@@ -186,6 +186,9 @@ def write(self, text):
     def flush(self):
         pass
 
+    def isatty(self):
+        return False
+
 
 class StreamReceiver(QtCore.QThread):
     new_text = QtCore.Signal(str)