1 files changed, 2 insertions, 0 deletions
diff --git a/setup.cfg b/setup.cfg
index 06dcd8fd4..7bade2c48 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,6 +20,8 @@ env =
     D:XDG_CACHE_HOME=./tmp/cache
     D:XDG_CONFIG_HOME=./tmp/config
     D:XDG_DATA_HOME=./tmp/share
+markers =
+    in_subprocess: run test in a Python process forked from the main one
 
 [pycodestyle]
 max-line-length = 119