diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 2b43fd8..cb4173e 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -454,7 +454,8 @@
 {
     if (self->ok && self->raw) {
         PyObject *r;
-        r = _PyObject_CallMethodId(self->raw, &PyId__dealloc_warn, "O", source);
+        r = _PyObject_CallMethodIdObjArgs(self->raw, &PyId__dealloc_warn,
+                                          source, NULL);
         if (r)
             Py_DECREF(r);
         else
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 54cfb7f..69e3518 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -150,8 +150,8 @@
     PyObject *exc, *val, *tb;
     int rc;
     _Py_IDENTIFIER(close);
-    res = _PyObject_CallMethodId((PyObject*)&PyRawIOBase_Type,
-                                 &PyId_close, "O", self);
+    res = _PyObject_CallMethodIdObjArgs((PyObject*)&PyRawIOBase_Type,
+                                        &PyId_close, self, NULL);
     if (!self->closefd) {
         self->fd = -1;
         return res;
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 472ef3b..ee6ad47 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -661,7 +661,8 @@
            to remove the bytecode interpretation overhead, but it could
            probably be removed here. */
         _Py_IDENTIFIER(extend);
-        PyObject *ret = _PyObject_CallMethodId(result, &PyId_extend, "O", self);
+        PyObject *ret = _PyObject_CallMethodIdObjArgs(result, &PyId_extend,
+                                                      self, NULL);
 
         if (ret == NULL) {
             Py_DECREF(result);
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index d28f613..0a6dfe1 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -899,8 +899,8 @@
         PyObject *locale_module = _PyIO_get_locale_module(state);
         if (locale_module == NULL)
             goto catch_ImportError;
-        self->encoding = _PyObject_CallMethodId(
-            locale_module, &PyId_getpreferredencoding, "O", Py_False);
+        self->encoding = _PyObject_CallMethodIdObjArgs(
+            locale_module, &PyId_getpreferredencoding, Py_False, NULL);
         Py_DECREF(locale_module);
         if (self->encoding == NULL) {
           catch_ImportError:
@@ -2644,7 +2644,9 @@
     else {
         PyObject *exc = NULL, *val, *tb;
         if (self->finalizing) {
-            res = _PyObject_CallMethodId(self->buffer, &PyId__dealloc_warn, "O", self);
+            res = _PyObject_CallMethodIdObjArgs(self->buffer,
+                                                &PyId__dealloc_warn,
+                                                self, NULL);
             if (res)
                 Py_DECREF(res);
             else
diff --git a/Modules/_io/winconsoleio.c b/Modules/_io/winconsoleio.c
index 7b00a9e..d8e4339 100644
--- a/Modules/_io/winconsoleio.c
+++ b/Modules/_io/winconsoleio.c
@@ -85,7 +85,7 @@
         Py_CLEAR(decoded);
         return '\0';
     }
-    decoded_upper = PyObject_CallMethod(decoded, "upper", "");
+    decoded_upper = PyObject_CallMethod(decoded, "upper", NULL);
     Py_CLEAR(decoded);
     if (!decoded_upper) {
         PyErr_Clear();
@@ -181,8 +181,8 @@
     PyObject *exc, *val, *tb;
     int rc;
     _Py_IDENTIFIER(close);
-    res = _PyObject_CallMethodId((PyObject*)&PyRawIOBase_Type,
-                                 &PyId_close, "O", self);
+    res = _PyObject_CallMethodIdObjArgs((PyObject*)&PyRawIOBase_Type,
+                                        &PyId_close, self, NULL);
     if (!self->closehandle) {
         self->handle = INVALID_HANDLE_VALUE;
         return res;