Issue 5354: Change API for import_fresh_module() to better support test_warnings use case (also fixes some bugs in the original implementation)
diff --git a/Lib/test/test_heapq.py b/Lib/test/test_heapq.py
index 625852d..7e3c7a1 100644
--- a/Lib/test/test_heapq.py
+++ b/Lib/test/test_heapq.py
@@ -8,7 +8,7 @@
# We do a bit of trickery here to be able to test both the C implementation
# and the Python implementation of the module.
import heapq as c_heapq
-py_heapq = test_support.import_fresh_module('heapq', ['_heapq'])
+py_heapq = test_support.import_fresh_module('heapq', blocked=['_heapq'])
class TestHeap(unittest.TestCase):
module = None