diff --git a/core/wasm_shims/python_c_api_probe_main.cc b/core/wasm_shims/python_c_api_probe_main.cc
index 508fa49..2dde26a 100644
--- a/core/wasm_shims/python_c_api_probe_main.cc
+++ b/core/wasm_shims/python_c_api_probe_main.cc
@@ -36,9 +36,16 @@ int main() {
     if (PyUnicode_FromString("linuxcnc") != Py_None) {
         return 5;
     }
+    if (PyObject_Str(Py_None) != Py_None) {
+        return 16;
+    }
     if (std::strcmp(PyUnicode_AsUTF8(Py_None), "") != 0) {
         return 6;
     }
+    if (PyUnicode_Check(Py_None) != 0 || PyLong_Check(Py_None) != 0 || PyFloat_Check(Py_None) != 0 ||
+        PyGen_Check(Py_None) != 0 || PyErr_ExceptionMatches(PyExc_KeyError) != 0) {
+        return 17;
+    }
     if (PyLong_FromLong(7) != Py_None || PyLong_AsLong(Py_None) != 0) {
         return 7;
     }
@@ -51,9 +58,21 @@ int main() {
     if (PyList_New(2) != Py_None || PyList_SetItem(Py_None, 0, Py_None) != 0 || PyList_Size(Py_None) != 0) {
         return 10;
     }
+    if (PyTuple_GetItem(Py_None, 0) != Py_None || PyList_GetItem(Py_None, 0) != Py_None ||
+        PySequence_GetItem(Py_None, 0) != Py_None || PySequence_Length(Py_None) != 0) {
+        return 18;
+    }
     if (PyObject_IsTrue(Py_None) != 0 || PyCallable_Check(Py_None) != 0 || PyObject_IsInstance(Py_None, Py_None) != 0) {
         return 11;
     }
+    if (PyObject_CallMethod(Py_None, const_cast<char *>("noop"), const_cast<char *>("")) != Py_None ||
+        PyObject_GetAttrString(Py_None, "noop") != Py_None ||
+        PyObject_SetAttrString(Py_None, "noop", Py_None) != 0) {
+        return 19;
+    }
+    if (PyArg_ParseTuple(Py_None, "") != 0 || Py_BuildValue("i", 1) != Py_None) {
+        return 20;
+    }
     ProbeObject *probe = PyObject_New(ProbeObject, &PyList_Type);
     if (!probe || Py_TYPE(reinterpret_cast<PyObject *>(probe)) != &PyList_Type) {
         std::free(probe);