diff --git a/lib/chess/moves/rook.ex b/lib/chess/moves/rook.ex
index 3029867..13be14d 100644
--- a/lib/chess/moves/rook.ex
+++ b/lib/chess/moves/rook.ex
@@ -13,7 +13,7 @@ defmodule Chess.Moves.Rook do
   defp moves_north(board, {file, rank}) do
     board["#{file},#{rank}"]
     |> Map.get("colour")
-    |> Generator.moves(board, {file, rank}, {0, +1})
+    |> Generator.moves(board, {file, rank}, {0, 1})
   end
 
   defp moves_south(board, {file, rank}) do
@@ -25,7 +25,7 @@ defmodule Chess.Moves.Rook do
   defp moves_east(board, {file, rank}) do
     board["#{file},#{rank}"]
     |> Map.get("colour")
-    |> Generator.moves(board, {file, rank}, {+1, 0})
+    |> Generator.moves(board, {file, rank}, {1, 0})
   end
 
   defp moves_west(board, {file, rank}) do
diff --git a/test/chess/moves/rook_test.exs b/test/chess/moves/rook_test.exs
index 952629a..2b407b3 100644
--- a/test/chess/moves/rook_test.exs
+++ b/test/chess/moves/rook_test.exs
@@ -14,7 +14,7 @@ defmodule Chess.Moves.RookTest do
     assert Enum.sort(moves) == expected_moves
   end
 
-  test "rook cannot move further than the edge" do
+  test "rooks cannot move further than the edge" do
     board = %{"0,0" => %{"type" => "rook", "colour" => "white"}}
     moves = Moves.available(board, {0, 0})
 
@@ -25,7 +25,7 @@ defmodule Chess.Moves.RookTest do
     assert Enum.sort(moves) == expected_moves
   end
 
-  test "rook is obstructed by another piece of the same colour" do
+  test "rooks are blocked by another piece of the same colour" do
     board = %{
       "0,0" => %{"type" => "rook", "colour" => "white"},
       "0,5" => %{"type" => "king", "colour" => "white"},
@@ -39,7 +39,7 @@ defmodule Chess.Moves.RookTest do
     assert Enum.sort(moves) == expected_moves
   end
 
-  test "rook can take a piece of the opposite colour" do
+  test "rooks can take an opponents piece" do
     board = %{
       "0,0" => %{"type" => "rook", "colour" => "white"},
       "0,5" => %{"type" => "knight", "colour" => "black"},