diff --git a/lib/linguist/generated.rb b/lib/linguist/generated.rb
index db591ae0..ea0a40ad 100644
--- a/lib/linguist/generated.rb
+++ b/lib/linguist/generated.rb
@@ -59,7 +59,8 @@ module Linguist
         generated_net_docfile? ||
         generated_net_designer_file? ||
         generated_protocol_buffer? ||
-        generated_jni_header?
+        generated_jni_header? ||
+        node_modules?
     end
 
     # Internal: Is the blob an XCode project file?
@@ -193,5 +194,13 @@ module Linguist
       return lines[0].include?("/* DO NOT EDIT THIS FILE - it is machine generated */")
       return lines[1].include?("#include <jni.h>")
     end
+
+    # node_modules/ can contain large amounts of files, in general not meant
+    # for humans in pull requests.
+    #
+    # Returns true or false.
+    def node_modules?
+      !!name.match(/node_modules\//)
+    end
   end
 end
diff --git a/test/test_blob.rb b/test/test_blob.rb
index 7a1821d8..252de56d 100644
--- a/test/test_blob.rb
+++ b/test/test_blob.rb
@@ -204,6 +204,8 @@ class TestBlob < Test::Unit::TestCase
     # Minified CSS
     assert !blob("CSS/bootstrap.css").generated?
     assert blob("CSS/bootstrap.min.css").generated?
+
+    assert Linguist::Generated.generated?("node_modules/grunt/lib/grunt.js", nil)
   end
 
   def test_vendored