diff --git a/Modules/_testinternalcapi.c b/Modules/_testinternalcapi.c
index d5616fd59c..6ddfd0b1d4 100644
--- a/Modules/_testinternalcapi.c
+++ b/Modules/_testinternalcapi.c
@@ -365,6 +365,31 @@ test_edit_cost(PyObject *self, PyObject *Py_UNUSED(args))
 }
 
 
+static PyObject *
+test_bench(PyObject *self, PyObject *args)
+{
+    PyObject *func, *arg;
+    Py_ssize_t nloops;
+    _PyTime_t t1, t2;
+    if (!PyArg_ParseTuple(args, "nOO", &nloops, &func, &arg)) {
+        return NULL;
+    }
+
+    t1 = _PyTime_GetPerfCounter();
+    for (size_t i=0; i<(size_t)nloops; i++) {
+        PyObject *res = PyObject_CallOneArg(func, arg);
+        if (res == NULL) {
+            return res;
+        }
+        Py_DECREF(res);
+    }
+    t2 = _PyTime_GetPerfCounter();
+
+    double d = _PyTime_AsSecondsDouble(t2 - t1);
+    return PyFloat_FromDouble(d);
+}
+
+
 static PyMethodDef TestMethods[] = {
     {"get_configs", get_configs, METH_NOARGS},
     {"get_recursion_depth", get_recursion_depth, METH_NOARGS},
@@ -376,6 +401,7 @@ static PyMethodDef TestMethods[] = {
     {"set_config", test_set_config, METH_O},
     {"test_atomic_funcs", test_atomic_funcs, METH_NOARGS},
     {"test_edit_cost", test_edit_cost, METH_NOARGS},
+    {"test_bench", test_bench, METH_VARARGS},
     {NULL, NULL} /* sentinel */
 };