diff --git a/Library/Homebrew/test/test_build_environment.rb b/Library/Homebrew/test/test_build_environment.rb
index 879d450477..001d332a8a 100644
--- a/Library/Homebrew/test/test_build_environment.rb
+++ b/Library/Homebrew/test/test_build_environment.rb
@@ -7,7 +7,7 @@ class BuildEnvironmentTests < Homebrew::TestCase
   end
 
   def test_shovel_returns_self
-    assert_same @env, (@env << :foo)
+    assert_same @env, @env << :foo
   end
 
   def test_merge_returns_self
diff --git a/Library/Homebrew/test/test_compiler_queue.rb b/Library/Homebrew/test/test_compiler_queue.rb
index a083837b0f..16d3d3479a 100644
--- a/Library/Homebrew/test/test_compiler_queue.rb
+++ b/Library/Homebrew/test/test_compiler_queue.rb
@@ -9,7 +9,7 @@ class CompilerQueueTests < Homebrew::TestCase
   end
 
   def test_shovel_returns_self
-    assert_same @q, (@q << Object.new)
+    assert_same @q, @q << Object.new
   end
 
   def test_empty
diff --git a/Library/Homebrew/test/test_dependencies.rb b/Library/Homebrew/test/test_dependencies.rb
index 706b226b35..a83e7c89ec 100644
--- a/Library/Homebrew/test/test_dependencies.rb
+++ b/Library/Homebrew/test/test_dependencies.rb
@@ -9,7 +9,7 @@ class DependenciesTests < Homebrew::TestCase
   end
 
   def test_shovel_returns_self
-    assert_same @deps, (@deps << Dependency.new("foo"))
+    assert_same @deps, @deps << Dependency.new("foo")
   end
 
   def test_no_duplicate_deps
@@ -86,7 +86,7 @@ class RequirementsTests < Homebrew::TestCase
   end
 
   def test_shovel_returns_self
-    assert_same @reqs, (@reqs << Object.new)
+    assert_same @reqs, @reqs << Object.new
   end
 
   def test_merging_multiple_dependencies
diff --git a/Library/Homebrew/test/test_options.rb b/Library/Homebrew/test/test_options.rb
index e10a7e9693..3f7d8d6c86 100644
--- a/Library/Homebrew/test/test_options.rb
+++ b/Library/Homebrew/test/test_options.rb
@@ -70,15 +70,15 @@ class OptionsTests < Homebrew::TestCase
   end
 
   def test_union_returns_options
-    assert_instance_of Options, (@options + Options.new)
+    assert_instance_of Options, @options + Options.new
   end
 
   def test_difference_returns_options
-    assert_instance_of Options, (@options - Options.new)
+    assert_instance_of Options, @options - Options.new
   end
 
   def test_shovel_returns_self
-    assert_same @options, (@options << Option.new("foo"))
+    assert_same @options, @options << Option.new("foo")
   end
 
   def test_as_flags