diff --git a/test/config/bashrc b/test/config/bashrc
index 15e891979d4..85d9e4d380a 100644
--- a/test/config/bashrc
+++ b/test/config/bashrc
@@ -16,6 +16,8 @@ set -o nounset
 # troubles and slows down testing
 unset -f command_not_found_handle
 
+shopt -s localvar_inherit 2>/dev/null
+
 TESTDIR=$(pwd)
 
 export PS2='> '