diff --git a/performance_check b/performance_check
index 069f78fc..6468090a 100755
--- a/performance_check
+++ b/performance_check
@@ -15,6 +15,7 @@ my @tests = (
     ['split pages', ['--split-pages', '--remove-unreferenced-resources=no']],
     ['shared resource check', ['--split-pages', '--remove-unreferenced-resources=auto']],
     ['linearize', ['--linearize']],
+    ['encrypt', ['--encrypt', 'u', 'o', '256', '--']],
     );
 
 # If arg is not found in help output, look here. If not here, skip test.