diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 6cb3d01c..60736970 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -606,6 +606,7 @@ PHP:
   - .php4
   - .php5
   - .ctp
+  - .phpt
 
 Parrot Internal Representation:
   lexer: Text only