diff --git a/devscripts/run_tests.sh b/devscripts/run_tests.sh
index 7f4c1e083..f4f73484f 100755
--- a/devscripts/run_tests.sh
+++ b/devscripts/run_tests.sh
@@ -16,4 +16,4 @@ case "$YTDL_TEST_SET" in
     ;;
 esac
 
-nosetests test --verbose $test_set
+nosetests test --verbose $test_set --processes=4 --process-timeout=540
diff --git a/test/test_download.py b/test/test_download.py
index 463952989..7decaf11e 100644
--- a/test/test_download.py
+++ b/test/test_download.py
@@ -65,6 +65,8 @@ defs = gettestcases()
 
 
 class TestDownload(unittest.TestCase):
+    _multiprocess_shared_ = True
+
     maxDiff = None
 
     def setUp(self):