diff --git a/test/xkey.c b/test/xkey.c
index 4f775f2..4013201 100644
--- a/test/xkey.c
+++ b/test/xkey.c
@@ -9,7 +9,7 @@ static void print_keysym(const char *s)
     if (ks == NoSymbol)
         printf("NoSymbol\n");
     else
-        printf("0x%lx\n", ks);
+        printf("0x%lX\n", ks);
 }
 
 static void print_string(KeySym ks)
diff --git a/test/xkey.sh b/test/xkey.sh
index a409302..a2d0ce0 100755
--- a/test/xkey.sh
+++ b/test/xkey.sh
@@ -27,7 +27,7 @@ check_key()
         exit $?
 }
 
-check_string Undo 0xff65
+check_string Undo 0xFF65
 check_key 0x1008FF56 XF86Close
 check_string ThisKeyShouldNotExist NoSymbol
 check_key 0x0 NULL