diff --git a/tests/checks/set.fish b/tests/checks/set.fish
index da8ac8108..4865ec916 100644
--- a/tests/checks/set.fish
+++ b/tests/checks/set.fish
@@ -1,4 +1,4 @@
-# RUN: env FISH=%fish %fish %s
+# RUN: env XDG_CONFIG_HOME="$(mktemp -d)" FISH=%fish %fish %s
 
 # Environment variable tests