diff --git a/tests/__init__.py b/tests/__init__.py
index 25ff0c906..6b7358582 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -9,3 +9,6 @@ else:
     import resource
 
     resource.setrlimit(resource.RLIMIT_NOFILE, (2048, 2048))
+
+    nproc_soft, nproc_hard = resource.getrlimit(resource.RLIMIT_NPROC)
+    resource.setrlimit(resource.RLIMIT_NPROC, (nproc_hard, nproc_hard))