diff --git a/lib/stackprof/report.rb b/lib/stackprof/report.rb
index 523646b3..71911bcc 100644
--- a/lib/stackprof/report.rb
+++ b/lib/stackprof/report.rb
@@ -42,7 +42,7 @@ def max_samples
     end
 
     def files
-      @data[:files] ||= @data[:frames].inject(Hash.new) do |hash, (addr, frame)|
+      @data[:files] ||= @data[:frames].inject(Hash.new) do |hash, (_addr, frame)|
         if file = frame[:file] and lines = frame[:lines]
           hash[file] ||= Hash.new
           lines.each do |line, weight|
diff --git a/test/test_stackprof.rb b/test/test_stackprof.rb
index 27da5c37..f6fe7e30 100644
--- a/test/test_stackprof.rb
+++ b/test/test_stackprof.rb
@@ -148,7 +148,6 @@ def test_gc
       end
     end
 
-    raw = profile[:raw]
     gc_frame = profile[:frames].values.find{ |f| f[:name] == "(garbage collection)" }
     assert gc_frame
     assert_equal gc_frame[:samples], profile[:gc_samples]