diff --git a/master/custom/factories.py b/master/custom/factories.py
index 09fbba73..86433c8d 100644
--- a/master/custom/factories.py
+++ b/master/custom/factories.py
@@ -239,6 +239,8 @@ class UnixAsanBuild(UnixBuild):
     # These tests are currently raising false positives or are interfering with the ASAN mechanism,
     # so we need to skip them unfortunately.
     testFlags = ("-j1 -x test_ctypes test_capi test_crypt test_decimal test_faulthandler test_interpreters")
+    # Sometimes test_multiprocessing_fork times out after 15 minutes
+    test_timeout = TEST_TIMEOUT * 2
 
 
 class UnixAsanDebugBuild(UnixAsanBuild):