diff --git a/Mac/Tools/pythonw.c b/Mac/Tools/pythonw.c
index 78813e818e7..9dfb77f6ff4 100644
--- a/Mac/Tools/pythonw.c
+++ b/Mac/Tools/pythonw.c
@@ -27,7 +27,6 @@
 #include <err.h>
 #include <dlfcn.h>
 #include <stdlib.h>
-#include <Python.h>
 #include <mach-o/dyld.h>
 
 
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index 82398547f9b..ee8c5880201 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -32,12 +32,11 @@
 /* EVP is the preferred interface to hashing in OpenSSL */
 #include <openssl/evp.h>
 #include <openssl/hmac.h>
-#include <openssl/crypto.h>
+#include <openssl/crypto.h>       // FIPS_mode()
 /* We use the object interface to discover what hashes OpenSSL supports. */
 #include <openssl/objects.h>
 #include <openssl/err.h>
 
-#include <openssl/crypto.h>       // FIPS_mode()
 
 #ifndef OPENSSL_THREADS
 #  error "OPENSSL_THREADS is not defined, Python requires thread-safe OpenSSL"
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index 114c69a0335..798a7629257 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -13,7 +13,6 @@
 #include "pycore_bytesobject.h"   // _PyBytes_Repeat
 #include "structmember.h"         // PyMemberDef
 #include <stddef.h>               // offsetof()
-#include <stddef.h>
 
 /*[clinic input]
 module array
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 0e472e1ee4f..fdd1450050f 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -13,7 +13,7 @@
 #include "pycore_moduleobject.h"  // _PyModule_GetState()
 #include "pycore_pyerrors.h"      // _PyErr_SetString()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
-#include "pycore_signal.h"
+#include "pycore_signal.h"        // Py_NSIG
 
 #ifndef MS_WINDOWS
 #  include "posixmodule.h"
@@ -28,8 +28,6 @@
 #  endif
 #endif
 
-#include "pycore_signal.h"        // Py_NSIG
-
 #ifdef HAVE_SIGNAL_H
 #  include <signal.h>
 #endif
diff --git a/Programs/_testembed.c b/Programs/_testembed.c
index a6ce3f7b200..00717114b40 100644
--- a/Programs/_testembed.c
+++ b/Programs/_testembed.c
@@ -9,7 +9,6 @@
 #include "pycore_initconfig.h"    // _PyConfig_InitCompatConfig()
 #include "pycore_runtime.h"       // _PyRuntime
 #include "pycore_import.h"        // _PyImport_FrozenBootstrap
-#include <Python.h>
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>               // putenv()