diff --git a/tests/py3-ignores.txt b/tests/py3-ignores.txt
index aa091835c..efb13bcd2 100644
--- a/tests/py3-ignores.txt
+++ b/tests/py3-ignores.txt
@@ -55,7 +55,6 @@ tests/test_spidermiddleware_offsite.py
 tests/test_spidermiddleware_referer.py
 tests/test_spider.py
 tests/test_stats.py
-tests/test_utils_defer.py
 tests/test_utils_iterators.py
 tests/test_utils_jsonrpc.py
 tests/test_utils_log.py