Use pytest.gc_collect() instead of gc.collect().

Author: torokati44

tests/test_consume.py

@@ -1,4 +1,4 @@
-import gc
+import pytest
 
 
 def test_consume_argument(capture):
@@ -36,7 +36,7 @@ def test_consume_argument(capture):
         del filt
         del box_1
         del box_8
-        gc.collect()
+        pytest.gc_collect()
     assert capture == "Filter destroyed."
 
     assert Box.get_num_boxes() == 1  # 1 box is leaked, and we can't do anything