diff --git a/tests/debian/01/run b/tests/debian/01/run
index cb9b4cb5..6db7cf0e 100755
--- a/tests/debian/01/run
+++ b/tests/debian/01/run
@@ -25,9 +25,9 @@ dpkg -L login | sort > tmp/login_files
 dpkg -L passwd | sort > tmp/passwd_files
 
 echo -n "Checking the login files..."
-diff data/login_files tmp/login_files
+diff -u data/login_files tmp/login_files
 echo "OK"
 echo -n "Checking the passwd files..."
-diff data/passwd_files tmp/passwd_files
+diff -u data/passwd_files tmp/passwd_files
 echo OK