diff --git a/openflexure_microscope/camera/mock.py b/openflexure_microscope/camera/mock.py
index 6a67d9d2..963e50ae 100644
--- a/openflexure_microscope/camera/mock.py
+++ b/openflexure_microscope/camera/mock.py
@@ -33,7 +33,7 @@ class StreamingCamera(BaseCamera):
 
         # Update config properties
         self.image_resolution = (1312, 976)
-        self.stream_resolution = (832, 624)
+        self.stream_resolution = (640, 480)
         self.numpy_resolution = (1312, 976)
         self.jpeg_quality = 75
         self.framerate = 10