diff --git a/lib/overcommit/hook/pre_commit/jsxcs.rb b/lib/overcommit/hook/pre_commit/jsxcs.rb
index e07f9cb6..7a196b22 100644
--- a/lib/overcommit/hook/pre_commit/jsxcs.rb
+++ b/lib/overcommit/hook/pre_commit/jsxcs.rb
@@ -7,22 +7,14 @@ def run
       return :pass if result.success?
 
       if result.status == 1
+        # No configuration found
         return :warn, result.stderr.chomp
       end
 
-      # Keep lines from the output for files that we actually modified
-      error_lines, warning_lines = result.stdout.split("\n").partition do |output_line|
-        if match = output_line.match(/^([^:]+):[^\d]+(\d+)/)
-          file = match[1]
-          line = match[2]
-        end
-        modified_lines(file).include?(line.to_i)
-      end
-
-      return :fail, error_lines.join("\n") unless error_lines.empty?
-
-      [:warn, "Modified files have lints (on lines you didn't modify)\n" <<
-              warning_lines.join("\n")]
+      extract_messages(
+        result.stdout.split("\n"),
+        /^(?<file>[^:]+):[^\d]+(?<line>\d+)/,
+      )
     end
   end
 end
diff --git a/spec/overcommit/hook/pre_commit/jsxcs_spec.rb b/spec/overcommit/hook/pre_commit/jsxcs_spec.rb
index db7b4858..735a4c29 100644
--- a/spec/overcommit/hook/pre_commit/jsxcs_spec.rb
+++ b/spec/overcommit/hook/pre_commit/jsxcs_spec.rb
@@ -29,25 +29,13 @@
       subject.stub(:execute).and_return(result)
     end
 
-    context 'and it reports lines that were not modified by the commit' do
+    context 'and it reports an error' do
       before do
         result.stub(:stdout).and_return([
           'file1.js.jsx: line 1, col 4, Missing space after `if` keyword'
         ].join("\n"))
 
-        subject.stub(:modified_lines).and_return([2, 3])
-      end
-
-      it { should warn }
-    end
-
-    context 'and it reports lines that were modified by the commit' do
-      before do
-        result.stub(:stdout).and_return([
-          'file1.js.jsx: line 1, col 4, Missing space after `if` keyword'
-        ].join("\n"))
-
-        subject.stub(:modified_lines).and_return([1, 2])
+        subject.stub(:modified_lines_in_file).and_return([1, 2])
       end
 
       it { should fail_hook }