diff --git a/lib/hydra/runner.rb b/lib/hydra/runner.rb
index aa3f546..ac8b5df 100644
--- a/lib/hydra/runner.rb
+++ b/lib/hydra/runner.rb
@@ -35,11 +35,11 @@ module Hydra #:nodoc:
       trace "Running file: #{file}"
 
       output = ""
-      if file =~ /_spec.rb$/
+      if file =~ /_spec.rb$/i
         output = run_rspec_file(file)
-      elsif file =~ /.feature$/
+      elsif file =~ /.feature$/i
         output = run_cucumber_file(file)
-      elsif file =~ /.js$/
+      elsif file =~ /.js$/i or file =~ /.json$/i
         output = run_javascript_file(file)
       else
         output = run_test_unit_file(file)
diff --git a/test/fixtures/json_data.json b/test/fixtures/json_data.json
new file mode 100644
index 0000000..75bfbfe
--- /dev/null
+++ b/test/fixtures/json_data.json
@@ -0,0 +1,4 @@
+{
+  "var1": "something",
+  "var2": "trailing comma",
+}
diff --git a/test/runner_test.rb b/test/runner_test.rb
index a8f7861..3bc8ce8 100644
--- a/test/runner_test.rb
+++ b/test/runner_test.rb
@@ -43,6 +43,12 @@ class RunnerTest < Test::Unit::TestCase
       assert results =~ /Missing semicolon/
     end
 
+    should "run a json data file and find errors" do
+      runner = Hydra::Runner.new(:io => File.new('/dev/null', 'w'))
+      results = runner.run_file(json_file)
+      assert results =~ /trailing comma/
+    end
+
     should "run two rspec tests" do
       runner = Hydra::Runner.new(:io => File.new('/dev/null', 'w'))
       runner.run_file(rspec_file)
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 9b733a5..63b38a8 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -46,6 +46,10 @@ class Test::Unit::TestCase
   def javascript_file
     File.expand_path(File.join(File.dirname(__FILE__), 'fixtures', 'js_file.js'))
   end
+
+  def json_file
+    File.expand_path(File.join(File.dirname(__FILE__), 'fixtures', 'json_data.json'))
+  end
 end
 
 module Hydra #:nodoc: