diff --git a/attach/frida_uprobe_attach_impl/CMakeLists.txt b/attach/frida_uprobe_attach_impl/CMakeLists.txt
index 258c0893..a69128e7 100644
--- a/attach/frida_uprobe_attach_impl/CMakeLists.txt
+++ b/attach/frida_uprobe_attach_impl/CMakeLists.txt
@@ -22,6 +22,7 @@ set(TEST_SOURCES
     test/test_filter_attach_with_override.cpp
     test/test_replace_attach_with_override.cpp
     test/test_attach_with_unified_interface.cpp
+    test/test_attach_private_data_parsing.cpp
 )
 add_executable(bpftime_frida_uprobe_attach_tests ${TEST_SOURCES})
 
diff --git a/attach/frida_uprobe_attach_impl/test/test_attach_private_data_parsing.cpp b/attach/frida_uprobe_attach_impl/test/test_attach_private_data_parsing.cpp
new file mode 100644
index 00000000..f53f5ccc
--- /dev/null
+++ b/attach/frida_uprobe_attach_impl/test/test_attach_private_data_parsing.cpp
@@ -0,0 +1,15 @@
+#include <catch2/catch_test_macros.hpp>
+#include <cerrno>
+#include <memory>
+#include <frida_attach_private_data.hpp>
+using namespace bpftime;
+
+TEST_CASE("Test illegal parsing")
+{
+	SECTION("Test bad strings")
+	{
+		auto priv = std::make_unique<
+			bpftime::attach::frida_attach_private_data>();
+		REQUIRE(priv->initialize_from_string("aaa:") == -EINVAL);
+	}
+}