diff --git a/Modules/_testlimitedcapi.c b/Modules/_testlimitedcapi.c
index 0a562ea9c03110b..9d2c395db037ca1 100644
--- a/Modules/_testlimitedcapi.c
+++ b/Modules/_testlimitedcapi.c
@@ -5,6 +5,15 @@
  * standard Python regression test, via Lib/test/test_capi.py.
  */
 
+#include "pyconfig.h"   // Py_GIL_DISABLED
+
+#ifdef Py_GIL_DISABLED
+   // Cannot test the limited C API
+#else
+   // Use the oldest limited C API version
+#  define Py_LIMITED_API 0x03020000
+#endif
+
 #include "_testlimitedcapi/parts.h"
 
 static PyMethodDef TestMethods[] = {
diff --git a/Modules/_testlimitedcapi/capsule.c b/Modules/_testlimitedcapi/capsule.c
index 07b85823f399ba3..8dd870034023a35 100644
--- a/Modules/_testlimitedcapi/capsule.c
+++ b/Modules/_testlimitedcapi/capsule.c
@@ -1,5 +1,8 @@
 #include "parts.h"
 
+#include <stdlib.h>               // free()
+
+
 static void
 capsule_destructor(PyObject *op)
 {
diff --git a/Modules/_testlimitedcapi/codec.c b/Modules/_testlimitedcapi/codec.c
index fdc18eedc2d2886..44eecf99f678bb8 100644
--- a/Modules/_testlimitedcapi/codec.c
+++ b/Modules/_testlimitedcapi/codec.c
@@ -1,7 +1,8 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
-
-// Need limited C API version 3.5 for PyCodec_NameReplaceErrors()
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
+   // Need limited C API version 3.5 for PyCodec_NameReplaceErrors()
 #  define Py_LIMITED_API 0x03050000
 #endif
 
diff --git a/Modules/_testlimitedcapi/file.c b/Modules/_testlimitedcapi/file.c
index e082e3c6700ee71..c627c6ceaa201ef 100644
--- a/Modules/_testlimitedcapi/file.c
+++ b/Modules/_testlimitedcapi/file.c
@@ -1,5 +1,7 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#ifndef Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
    // Need limited C API 3.13 for PyLong_AsInt()
 #  define Py_LIMITED_API 0x030d0000
 #endif
diff --git a/Modules/_testlimitedcapi/heaptype_relative.c b/Modules/_testlimitedcapi/heaptype_relative.c
index c02a52368b5324c..a5e15026f028ca7 100644
--- a/Modules/_testlimitedcapi/heaptype_relative.c
+++ b/Modules/_testlimitedcapi/heaptype_relative.c
@@ -1,6 +1,8 @@
-// Need limited C API version 3.15 for _DuringGC functions
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#ifdef Py_GIL_DISABLED
+   // Cannot test the limited C API
+#else
+   // Need limited C API version 3.15 for _DuringGC functions
 #  define Py_LIMITED_API 0x030f0000
 #endif
 
diff --git a/Modules/_testlimitedcapi/import.c b/Modules/_testlimitedcapi/import.c
index f572212ba88b76e..48c477bf3ccc489 100644
--- a/Modules/_testlimitedcapi/import.c
+++ b/Modules/_testlimitedcapi/import.c
@@ -1,6 +1,8 @@
-// Need limited C API version 3.13 for PyImport_AddModuleRef()
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
+   // Need limited C API version 3.13 for PyImport_AddModuleRef()
 #  define Py_LIMITED_API 0x030d0000
 #endif
 
diff --git a/Modules/_testlimitedcapi/list.c b/Modules/_testlimitedcapi/list.c
index ed492c3e719727a..91c8ad60e3b990d 100644
--- a/Modules/_testlimitedcapi/list.c
+++ b/Modules/_testlimitedcapi/list.c
@@ -1,6 +1,8 @@
-// Need limited C API version 3.13 for PyList_GetItemRef()
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
+   // Need limited C API version 3.13 for PyList_GetItemRef()
 #  define Py_LIMITED_API 0x030d0000
 #endif
 
diff --git a/Modules/_testlimitedcapi/long.c b/Modules/_testlimitedcapi/long.c
index 99b9e96760d50df..7c6928dd234e323 100644
--- a/Modules/_testlimitedcapi/long.c
+++ b/Modules/_testlimitedcapi/long.c
@@ -1,5 +1,7 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#ifndef Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
    // Need limited C API 3.14 to test PyLong_AsInt64()
 #  define Py_LIMITED_API 0x030e0000
 #endif
diff --git a/Modules/_testlimitedcapi/object.c b/Modules/_testlimitedcapi/object.c
index da6fe3e4efa34c2..594ba60f9abf204 100644
--- a/Modules/_testlimitedcapi/object.c
+++ b/Modules/_testlimitedcapi/object.c
@@ -1,6 +1,8 @@
-// Need limited C API version 3.13 for Py_GetConstant()
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
+   // Need limited C API version 3.13 for Py_GetConstant()
 #  define Py_LIMITED_API 0x030d0000
 #endif
 
diff --git a/Modules/_testlimitedcapi/parts.h b/Modules/_testlimitedcapi/parts.h
index 32c1bbc1b71c977..5636b72c4d31875 100644
--- a/Modules/_testlimitedcapi/parts.h
+++ b/Modules/_testlimitedcapi/parts.h
@@ -7,8 +7,10 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
 
 // Use the limited C API
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
-   // need limited C API version 3.5 for PyModule_AddFunctions()
+#ifdef Py_GIL_DISABLED
+   // Cannot test the limited C API
+#elif !defined(Py_LIMITED_API)
+   // Need limited C API version 3.5 for PyModule_AddFunctions()
 #  define Py_LIMITED_API 0x03050000
 #endif
 
diff --git a/Modules/_testlimitedcapi/slots.c b/Modules/_testlimitedcapi/slots.c
index 9abe53d21154645..2a887cd49f4c4b7 100644
--- a/Modules/_testlimitedcapi/slots.c
+++ b/Modules/_testlimitedcapi/slots.c
@@ -1,3 +1,4 @@
+// Need limited C API version 3.15 for PyType_FromSlots()
 #define Py_LIMITED_API 0x030f0000
 
 #include "parts.h"
diff --git a/Modules/_testlimitedcapi/sys.c b/Modules/_testlimitedcapi/sys.c
index cec7f8ab6120198..618f4847c7ac6e5 100644
--- a/Modules/_testlimitedcapi/sys.c
+++ b/Modules/_testlimitedcapi/sys.c
@@ -1,8 +1,6 @@
-#include "pyconfig.h"   // Py_GIL_DISABLED
 // Need limited C API version 3.15 for PySys_GetAttr() etc
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
-#  define Py_LIMITED_API 0x030f0000
-#endif
+#define Py_LIMITED_API 0x030f0000
+
 #include "parts.h"
 #include "util.h"
 
diff --git a/Modules/_testlimitedcapi/unicode.c b/Modules/_testlimitedcapi/unicode.c
index c7a23d5d1cbd71a..980b192fdc3cbb6 100644
--- a/Modules/_testlimitedcapi/unicode.c
+++ b/Modules/_testlimitedcapi/unicode.c
@@ -1,5 +1,7 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#ifndef Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
    // Need limited C API 3.14 to test PyUnicode_Equal()
 #  define Py_LIMITED_API 0x030e0000
 #endif
diff --git a/Modules/_testlimitedcapi/vectorcall_limited.c b/Modules/_testlimitedcapi/vectorcall_limited.c
index 84362d523f49633..443c4aca28e3ae7 100644
--- a/Modules/_testlimitedcapi/vectorcall_limited.c
+++ b/Modules/_testlimitedcapi/vectorcall_limited.c
@@ -1,8 +1,10 @@
 /* Test Vectorcall in the limited API */
 
-// Need limited C API version 3.12 for PyObject_Vectorcall()
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
+#ifdef Py_GIL_DISABLED
+   // Cannot test the limited C API
+#else
+   // Need limited C API version 3.12 for PyObject_Vectorcall()
 #  define Py_LIMITED_API 0x030c0000
 #endif
 
diff --git a/Modules/_testlimitedcapi/version.c b/Modules/_testlimitedcapi/version.c
index 57cd6e4e928ea3f..d2a4551159165c0 100644
--- a/Modules/_testlimitedcapi/version.c
+++ b/Modules/_testlimitedcapi/version.c
@@ -1,8 +1,11 @@
 /* Test version macros in the limited API */
 
 #include "pyconfig.h"  // Py_GIL_DISABLED
-#ifndef Py_GIL_DISABLED
-#  define Py_LIMITED_API 0x030e0000  // Added in 3.14
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
+   // Need limited C API version 3.14 for Py_PACK_VERSION()
+#  define Py_LIMITED_API 0x030e0000
 #endif
 
 #include "parts.h"
diff --git a/Modules/_testlimitedcapi/weakref.c b/Modules/_testlimitedcapi/weakref.c
index e7f9d54d1a0d59e..a25e39e21af3748 100644
--- a/Modules/_testlimitedcapi/weakref.c
+++ b/Modules/_testlimitedcapi/weakref.c
@@ -1,5 +1,7 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
-#ifndef Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
+#  define Py_TARGET_ABI3T 0x030f0000
+#else
    // Need limited C API 3.5 for PyModule_AddFunctions()
 #  define Py_LIMITED_API 0x03050000
 #endif