diff --git a/tests/cases/ftdetect.yml b/tests/cases/ftdetect.yml
index 8ec23e9..3eb2cc6 100644
--- a/tests/cases/ftdetect.yml
+++ b/tests/cases/ftdetect.yml
@@ -17,6 +17,8 @@
 
 - filename: JUSTFILE
 
+- filename: JuStFiLe
+
 - filename: .justfile
 
 - filename: .Justfile