@@ -373,6 +373,13 @@ module_exec(PyObject *module)
         return -1;
     }
 #endif
+#ifdef _MSVC_LANG
+    if (PyModule_AddIntMacro(module, _MSVC_LANG) < 0) {
+        return -1;
+    }
+#endif
+    // Ignore "unused argument" warning when none of these macros is defined
+    (void)module;
     return 0;
 }
 
 
@@ -9,16 +9,14 @@ def run_tests(testmod, verbose=True):
         if not name.startswith('test'):
             continue
         func = getattr(testmod, name)
-        if verbose:
-            print(f"{name}()")
+        print(f"{name}()")
         func()
 
     print("add()")
     if testmod.add(11, 23) != 34:
         raise AssertionError("add() failed badly")
 
-    if verbose:
-        print(flush=True)
+    print(flush=True)
 
 
 def main():
@@ -29,6 +27,18 @@ def main():
 
     testmod = importlib.import_module(module_name)
 
+    newline = False
+    for name in ('__STDC_VERSION__', '__cplusplus', '_MSVC_LANG'):
+        try:
+            value = getattr(testmod, name)
+        except AttributeError:
+            pass
+        else:
+            print(f'{name}: {value}')
+            newline = True
+    if newline:
+        print()
+
     if hasattr(sys, 'gettotalrefcount'):
         # First run to warm up Python. For example, test_datetime() imports
         # the datetime module.
Original file line number	Diff line number	Diff line change
`@@ -373,6 +373,13 @@ module_exec(PyObject *module)`
`373`	`373`	`return -1;`
`374`	`374`	`}`
`375`	`375`	`#endif`
	`376`	`+#ifdef _MSVC_LANG`
	`377`	`+ if (PyModule_AddIntMacro(module, _MSVC_LANG) < 0) {`
	`378`	`+ return -1;`
	`379`	`+ }`
	`380`	`+#endif`
	`381`	`+ // Ignore "unused argument" warning when none of these macros is defined`
	`382`	`+ (void)module;`
`376`	`383`	`return 0;`
`377`	`384`	`}`
`378`	`385`