diff --git a/loc.cabal b/loc.cabal
--- a/loc.cabal
+++ b/loc.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           loc
-version:        0.1.2.0
+version:        0.1.2.1
 synopsis:       Types representing line and column positions and ranges in text files.
 
 description:    The package name /loc/ stands for “location” and is also an allusion to the
diff --git a/src/Data/Loc/Loc.hs b/src/Data/Loc/Loc.hs
--- a/src/Data/Loc/Loc.hs
+++ b/src/Data/Loc/Loc.hs
@@ -53,7 +53,7 @@
 locShowsPrec :: Int -> Loc -> ShowS
 locShowsPrec _ (Loc l c) =
   shows l .
-  (showString ":") .
+  showString ":" .
   shows c
 
 {- |
diff --git a/src/Data/Loc/Span.hs b/src/Data/Loc/Span.hs
--- a/src/Data/Loc/Span.hs
+++ b/src/Data/Loc/Span.hs
@@ -79,7 +79,7 @@
 spanShowsPrec :: Int -> Span -> ShowS
 spanShowsPrec _ (Span a b) =
   locShowsPrec 10 a .
-  (showString "-") .
+  showString "-" .
   locShowsPrec 10 b
 
 {- |
diff --git a/test/hedgehog.hs b/test/hedgehog.hs
--- a/test/hedgehog.hs
+++ b/test/hedgehog.hs
@@ -15,7 +15,7 @@
 
 main :: IO ()
 main =
-  checkConcurrent $$(discover) >>= \ok ->
+  checkParallel $$(discover) >>= \ok ->
   when (not ok) exitFailure
 
 prop_Span_add_mempty :: Property