diff --git a/.gitattributes b/.gitattributes
index b524aadd..28e9d297 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +1,5 @@
-test/*.rb linguist-vendored
+Gemfile linguist-vendored=true
 lib/linguist.rb linguist-language=Java
-lib/linguist/classifier.rb linguist-generated
+test/*.rb linguist-language=Java
+Rakefile linguist-generated
+test/fixtures/* linguist-vendored=false
diff --git a/test/fixtures/foo.rb b/test/fixtures/foo.rb
new file mode 100644
index 00000000..799c84bd
--- /dev/null
+++ b/test/fixtures/foo.rb
@@ -0,0 +1,3 @@
+def foo
+  return "BAR"
+end