diff --git a/source/host/System.cc b/source/host/System.cc
index 2eecdf7e..643ba372 100644
--- a/source/host/System.cc
+++ b/source/host/System.cc
@@ -58,6 +58,9 @@ void KSystem::handleOption(Option opt, int argc, char **argv, int &i) {
         }
 
         size_t size;
+        if (strcmp(argv[++i], "testCases.bin") != 0) {
+            exit(100);
+        }
         u8 *data = Abstract::File::Load(argv[++i], size);
         m_binaryData = std::span<u8>(data, size);
     } break;