1 files changed, 4 insertions, 0 deletions
diff --git a/test/image_harness.zig b/test/image_harness.zig
index 390c14e8..bd465e1c 100644
--- a/test/image_harness.zig
+++ b/test/image_harness.zig
@@ -40,6 +40,10 @@ pub fn main(init: std.process.Init) !void {
     if (libc.mkdir(base, 0o755) != 0 and libc.errno(-1) != .EXIST) return error.MkdirFailed;
     defer cleanupBase(arena, base);
     _ = setenv("HOME", base, 1);
+    // Do not let an exported developer XDG_CONFIG_HOME style or mutate the
+    // native process under test; this nonexistent directory is test-owned.
+    const config_home = try std.fmt.allocPrintSentinel(arena, "{s}/.config", .{base}, 0);
+    _ = setenv("XDG_CONFIG_HOME", config_home, 1);
     _ = setenv("HISTFILE", "/dev/null", 1);
     _ = setenv("TERM", "xterm-256color", 1);
     _ = setenv("LC_ALL", "C", 1);