diff --git a/test/testlogs.py b/test/testlogs.py
index 2133db2be..b8e399dad 100644
--- a/test/testlogs.py
+++ b/test/testlogs.py
@@ -156,6 +156,7 @@ class TestBuildLogs(BuildLogs):
     num_images = random.randint(2, 7)
     sizes = [random.randint(one_mb, one_mb * 5) for _ in range(num_images)]
 
+    image_completion = {}
     for image_num, image_size in enumerate(sizes):
       image_id = 'image_id_%s' % image_num