diff --git a/src/modules/haskell.rs b/src/modules/haskell.rs
index 488607676944e..6d9c20253ac0c 100644
--- a/src/modules/haskell.rs
+++ b/src/modules/haskell.rs
@@ -105,7 +105,7 @@ mod tests {
     fn folder_stack() -> io::Result<()> {
         let cases = vec![
             ("resolver: lts-18.12\n", "lts-18.12"),
-            ("snapshot:\tnightly-2011-11-11", "nightly-2011-11-11"),
+            ("snapshot: nightly-2011-11-11", "nightly-2011-11-11"),
             ("snapshot: ghc-8.10.7", "ghc-8.10.7"),
             (
                 "snapshot: https://github.com/whatever/xxx.yaml\n",