diff --git a/hspec-meta.cabal b/hspec-meta.cabal
--- a/hspec-meta.cabal
+++ b/hspec-meta.cabal
@@ -1,6 +1,5 @@
 name:             hspec-meta
-version:          1.9.1
-version:          1.9.2
+version:          1.9.3
 license:          MIT
 license-file:     LICENSE
 copyright:        (c) 2011-2014 Simon Hengel,
diff --git a/src/Test/Hspec/Runner/Eval.hs b/src/Test/Hspec/Runner/Eval.hs
--- a/src/Test/Hspec/Runner/Eval.hs
+++ b/src/Test/Hspec/Runner/Eval.hs
@@ -18,8 +18,8 @@
 import           Data.Time.Clock.POSIX
 
 data Tree a
-  = Node String [Tree a]
-  | Leaf String a
+  = Node! String [Tree a]
+  | Leaf! String a
   deriving (Eq, Show, Functor)
 
 toTree :: SpecTree -> Tree Item