diff --git a/testslide/mock_constructor.py b/testslide/mock_constructor.py
index 264ae01..c69919d 100644
--- a/testslide/mock_constructor.py
+++ b/testslide/mock_constructor.py
@@ -349,7 +349,6 @@ def mock_constructor(
                 "Usage with classes that define __new__() is currently not supported."
             )
 
-        gc.collect()
         instances = [
             obj
             for obj in gc.get_referrers(original_class)