diff --git a/spec/support/corpus.rb b/spec/support/corpus.rb
index 3b4e9ff8..9fa58705 100644
--- a/spec/support/corpus.rb
+++ b/spec/support/corpus.rb
@@ -50,7 +50,12 @@ module Corpus
       checkout
       start = Time.now
       paths = Pathname.glob(repo_path.join('**/*.rb')).sort_by(&:size).reverse
-      total = Parallel.map(paths, finish: method(:finish), start: method(:start), in_processes: parallel_processes) do |path|
+      options = {
+        finish: method(:finish),
+        start: method(:start),
+        in_processes: parallel_processes
+      }
+      total = Parallel.map(paths, options) do |path|
         count = 0
         node =
           begin
diff --git a/spec/unit/mutant/expression_spec.rb b/spec/unit/mutant/expression_spec.rb
index 7f4f5db6..9b6e23c7 100644
--- a/spec/unit/mutant/expression_spec.rb
+++ b/spec/unit/mutant/expression_spec.rb
@@ -28,7 +28,10 @@ RSpec.describe Mutant::Expression do
       let(:input) { 'test-syntax' }
 
       it 'raises an exception' do
-        expect { subject }.to raise_error(Mutant::Expression::AmbiguousExpressionError, 'Ambiguous expression: "test-syntax"')
+        expect { subject }.to raise_error(
+          Mutant::Expression::AmbiguousExpressionError,
+          'Ambiguous expression: "test-syntax"'
+        )
       end
     end
   end