diff --git a/test/config.c++ b/test/config.c++
index 4188e3c0..f9e75dac 100644
--- a/test/config.c++
+++ b/test/config.c++
@@ -313,12 +313,12 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option, b
     return true;
   }
 
-  if (strcasecmp(value_cstr, "yes") == 0 || strcasecmp(value_cstr, "1") == 0) {
+  if (strcasecmp(value_cstr, "yes") == 0 || strcasecmp(value_cstr, "1") == 0 || strcasecmp(value_cstr, "on") == 0) {
     value = true;
     return true;
   }
 
-  if (strcasecmp(value_cstr, "no") == 0 || strcasecmp(value_cstr, "0") == 0) {
+  if (strcasecmp(value_cstr, "no") == 0 || strcasecmp(value_cstr, "0") == 0 || strcasecmp(value_cstr, "off") == 0) {
     value = false;
     return true;
   }