diff --git a/core/wasm_shims/pythonplugin/python_plugin_probe_main.cc b/core/wasm_shims/pythonplugin/python_plugin_probe_main.cc
index 15bdd20..1a17dcb 100644
--- a/core/wasm_shims/pythonplugin/python_plugin_probe_main.cc
+++ b/core/wasm_shims/pythonplugin/python_plugin_probe_main.cc
@@ -16,22 +16,34 @@ int main() {
     if (plugin->configure(nullptr, nullptr) != PLUGIN_NO_SECTION) {
         return 6;
     }
+    if (plugin->usable()) {
+        return 26;
+    }
     if (plugin->last_errmsg() != "no section") {
         return 23;
     }
     if (plugin->configure("/tmp/cnc_sim_missing_python_plugin_probe.ini", "PYTHON") != PLUGIN_BAD_INIFILE) {
         return 7;
     }
+    if (plugin->usable()) {
+        return 27;
+    }
     boost::python::object retval;
     if (plugin->call(nullptr, "noop", boost::python::object(), boost::python::object(), retval) != PLUGIN_BAD_INIFILE) {
         return 14;
     }
+    if (plugin->is_callable(nullptr, "noop")) {
+        return 28;
+    }
     if (plugin->call_method(boost::python::object(), retval) != PLUGIN_BAD_INIFILE) {
         return 15;
     }
     if (plugin->run_string("noop", retval, false) != PLUGIN_OK) {
         return 3;
     }
+    if (!plugin->usable()) {
+        return 29;
+    }
     unsetenv("INI_FILE_NAME");
     if (plugin->configure(nullptr, "PYTHON") != PLUGIN_NO_INIFILE) {
         return 21;
@@ -53,6 +65,10 @@ int main() {
         std::remove(ini);
         return 22;
     }
+    if (plugin->usable()) {
+        std::remove(ini);
+        return 30;
+    }
     unsetenv("INI_FILE_NAME");
     if (plugin->configure(ini, "PYTHON") != PLUGIN_PYTHON_NOT_INITIALIZED) {
         std::remove(ini);
@@ -65,9 +81,15 @@ int main() {
     if (plugin->call_method(boost::python::object(), retval) != PLUGIN_PYTHON_NOT_INITIALIZED) {
         return 19;
     }
+    if (plugin->is_callable(nullptr, "noop")) {
+        return 31;
+    }
     if (plugin->run_string("noop", retval, false) != PLUGIN_OK) {
         return 20;
     }
+    if (plugin->is_callable(nullptr, nullptr)) {
+        return 32;
+    }
     if (plugin->call(nullptr, nullptr, boost::python::object(), boost::python::object(), retval) != PLUGIN_NO_CALLABLE) {
         return 8;
     }