diff --git a/test/config.cc b/test/config.cc
index ae9367e6..e920e90c 100644
--- a/test/config.cc
+++ b/test/config.cc
@@ -43,6 +43,11 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option,
 
   if (narg + 1 < argc && strncmp("--", argv[narg + 1], 2) != 0) {
     *value = argv[narg + 1];
+    if (strcmp(*value, "default") == 0) {
+      if (!default_value)
+        failure("Option '--%s' doen't accept default value\n", option);
+      *value = default_value;
+    }
     ++narg;
     return true;
   }
@@ -57,9 +62,15 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option,
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   std::string &value, bool allow_empty) {
+  return parse_option(argc, argv, narg, option, value, allow_empty,
+                      allow_empty ? "" : nullptr);
+}
+
+bool parse_option(int argc, char *const argv[], int &narg, const char *option,
+                  std::string &value, bool allow_empty,
+                  const char *default_value) {
   const char *value_cstr;
-  if (!parse_option(argc, argv, narg, option, &value_cstr,
-                    allow_empty ? "" : nullptr))
+  if (!parse_option(argc, argv, narg, option, &value_cstr, default_value))
     return false;
 
   if (!allow_empty && strlen(value_cstr) == 0)
@@ -110,12 +121,18 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option,
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   uint64_t &value, const scale_mode scale,
-                  const uint64_t minval, const uint64_t maxval) {
+                  const uint64_t minval, const uint64_t maxval,
+                  const uint64_t default_value) {
 
   const char *value_cstr;
   if (!parse_option(argc, argv, narg, option, &value_cstr))
     return false;
 
+  if (default_value && strcmp(value_cstr, "default") == 0) {
+    value = default_value;
+    return true;
+  }
+
   char *suffix = nullptr;
   errno = 0;
   unsigned long long raw = strtoull(value_cstr, &suffix, 0);
@@ -179,28 +196,58 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option,
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   unsigned &value, const scale_mode scale,
-                  const unsigned minval, const unsigned maxval) {
+                  const unsigned minval, const unsigned maxval,
+                  const unsigned default_value) {
 
   uint64_t huge;
-  if (!parse_option(argc, argv, narg, option, huge, scale, minval, maxval))
+  if (!parse_option(argc, argv, narg, option, huge, scale, minval, maxval,
+                    default_value))
     return false;
   value = (unsigned)huge;
   return true;
 }
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
-                  uint8_t &value, const uint8_t minval, const uint8_t maxval) {
+                  uint8_t &value, const uint8_t minval, const uint8_t maxval,
+                  const uint8_t default_value) {
 
   uint64_t huge;
-  if (!parse_option(argc, argv, narg, option, huge, no_scale, minval, maxval))
+  if (!parse_option(argc, argv, narg, option, huge, no_scale, minval, maxval,
+                    default_value))
     return false;
   value = (uint8_t)huge;
   return true;
 }
 
+bool parse_option(int argc, char *const argv[], int &narg, const char *option,
+                  int64_t &value, const int64_t minval, const int64_t maxval,
+                  const int64_t default_value) {
+  uint64_t proxy = (size_t)value;
+  if (parse_option(argc, argv, narg, option, proxy, config::binary,
+                   (uint64_t)minval, (uint64_t)maxval,
+                   (uint64_t)default_value)) {
+    value = (int64_t)proxy;
+    return true;
+  }
+  return false;
+}
+
+bool parse_option(int argc, char *const argv[], int &narg, const char *option,
+                  int32_t &value, const int32_t minval, const int32_t maxval,
+                  const int32_t default_value) {
+  uint64_t proxy = (size_t)value;
+  if (parse_option(argc, argv, narg, option, proxy, config::binary,
+                   (uint64_t)minval, (uint64_t)maxval,
+                   (uint64_t)default_value)) {
+    value = (int32_t)proxy;
+    return true;
+  }
+  return false;
+}
+
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   bool &value) {
-  const char *value_cstr = NULL;
+  const char *value_cstr = nullptr;
   if (!parse_option(argc, argv, narg, option, &value_cstr, "yes")) {
     const char *current = argv[narg];
     if (strncmp(current, "--no-", 5) == 0 && strcmp(current + 5, option) == 0) {
diff --git a/test/config.h b/test/config.h
index 86f37fbe..ef2ee080 100644
--- a/test/config.h
+++ b/test/config.h
@@ -62,6 +62,10 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option,
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   std::string &value, bool allow_empty = false);
 
+bool parse_option(int argc, char *const argv[], int &narg, const char *option,
+                  std::string &value, bool allow_empty,
+                  const char *default_value);
+
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   bool &value);
 
@@ -75,16 +79,25 @@ bool parse_option(int argc, char *const argv[], int &narg, const char *option,
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   uint64_t &value, const scale_mode scale,
-                  const uint64_t minval = 0, const uint64_t maxval = INT64_MAX);
+                  const uint64_t minval = 0, const uint64_t maxval = INT64_MAX,
+                  const uint64_t default_value = 0);
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   unsigned &value, const scale_mode scale,
-                  const unsigned minval = 0, const unsigned maxval = INT32_MAX);
+                  const unsigned minval = 0, const unsigned maxval = INT32_MAX,
+                  const unsigned default_value = 0);
 
 bool parse_option(int argc, char *const argv[], int &narg, const char *option,
                   uint8_t &value, const uint8_t minval = 0,
-                  const uint8_t maxval = 255);
+                  const uint8_t maxval = 255, const uint8_t default_value = 0);
 
+bool parse_option(int argc, char *const argv[], int &narg, const char *option,
+                  int64_t &value, const int64_t minval, const int64_t maxval,
+                  const int64_t default_value = -1);
+
+bool parse_option(int argc, char *const argv[], int &narg, const char *option,
+                  int32_t &value, const int32_t minval, const int32_t maxval,
+                  const int32_t default_value = -1);
 //-----------------------------------------------------------------------------
 
 #pragma pack(push, 1)