diff --git a/Lib/test/test_iter.py b/Lib/test/test_iter.py
index 3642c44..5878c79 100644
--- a/Lib/test/test_iter.py
+++ b/Lib/test/test_iter.py
@@ -1,7 +1,7 @@
 # Test iterators.
 
 import unittest
-from test.support import run_unittest, TESTFN, unlink
+from test.support import run_unittest, TESTFN, unlink, gc_collect
 
 # Test result of triple loop (too big to inline)
 TRIPLETS = [(0, 0, 0), (0, 0, 1), (0, 0, 2),
@@ -775,6 +775,7 @@
         x = C()
         self.assertEqual(C.count, 1)
         del x
+        gc_collect()
         self.assertEqual(C.count, 0)
         l = [C(), C(), C()]
         self.assertEqual(C.count, 3)
@@ -783,6 +784,7 @@
         except ValueError:
             pass
         del l
+        gc_collect()
         self.assertEqual(C.count, 0)