--- a/net/SwitchPinger_admin.c
+++ b/net/SwitchPinger_admin.c
@@ -78,8 +78,10 @@ static void adminPing(Dict* args, void*
     uint32_t timeout = (timeoutPtr) ? *timeoutPtr : DEFAULT_TIMEOUT;
     uint64_t path;
     String* err = NULL;
+    String* pathNotParsable = String_CONST("path was not parsable.");
+    String* noOpenSlots = String_CONST("no open slots to store ping, try later.");
     if (pathStr->len != 19 || AddrTools_parsePath(&path, (uint8_t*) pathStr->bytes)) {
-        err = String_CONST("path was not parsable.");
+        err = pathNotParsable;
     } else {
         struct SwitchPinger_Ping* ping = SwitchPinger_newPing(path,
                                                               data,
@@ -89,7 +91,7 @@ static void adminPing(Dict* args, void*
                                                               context->switchPinger);
         if (keyPing && *keyPing) { ping->type = SwitchPinger_Type_KEYPING; }
         if (!ping) {
-            err = String_CONST("no open slots to store ping, try later.");
+            err = noOpenSlots;
         } else {
             ping->onResponseContext = Allocator_clone(ping->pingAlloc, (&(struct Ping) {
                 .context = context,