diff --git a/samples/XML/pt_BR.ts b/samples/XML/pt_BR.xml
similarity index 100%
rename from samples/XML/pt_BR.ts
rename to samples/XML/pt_BR.xml
diff --git a/test/test_heuristics.rb b/test/test_heuristics.rb
index 75a559cd..148f49c5 100644
--- a/test/test_heuristics.rb
+++ b/test/test_heuristics.rb
@@ -53,13 +53,13 @@ class TestHeuristcs < Test::Unit::TestCase
 
   def test_ts_typescript_by_heuristics
     languages = ["TypeScript", "XML"]
-    results = Heuristics.disambiguate_pl(fixture("TypeScript/class.ts"), languages)
+    results = Heuristics.disambiguate_ts(fixture("TypeScript/classes.ts"), languages)
     assert_equal Language["TypeScript"], results.first
   end
 
   def test_ts_xml_by_heuristics
     languages = ["TypeScript", "XML"]
-    results = Heuristics.disambiguate_pl(fixture("XML/pt_BR.ts"), languages)
+    results = Heuristics.disambiguate_ts(fixture("XML/pt_BR.xml"), languages)
     assert_equal Language["XML"], results.first
   end
 end