diff --git a/dlls/imm32/tests/imm32.c b/dlls/imm32/tests/imm32.c
index be3ddfce03b..ee1aeb39654 100644
--- a/dlls/imm32/tests/imm32.c
+++ b/dlls/imm32/tests/imm32.c
@@ -26,8 +26,6 @@
 #include "imm.h"
 #include "ddk/imm.h"
 
-#define NUMELEMS(array) (sizeof((array))/sizeof((array)[0]))
-
 static BOOL (WINAPI *pImmAssociateContextEx)(HWND,HIMC,DWORD);
 static BOOL (WINAPI *pImmIsUIMessageA)(HWND,UINT,WPARAM,LPARAM);
 static UINT (WINAPI *pSendInput) (UINT, INPUT*, size_t);
@@ -73,7 +71,7 @@ static LRESULT CALLBACK get_msg_filter(int nCode, WPARAM wParam, LPARAM lParam)
         MSG *msg = (MSG*)lParam;
 
         if ((msg->hwnd == msg_spy.hwnd || msg_spy.hwnd == NULL) &&
-            (msg_spy.i_msg < NUMELEMS(msg_spy.msgs)))
+            (msg_spy.i_msg < ARRAY_SIZE(msg_spy.msgs)))
         {
             msg_spy.msgs[msg_spy.i_msg].msg.hwnd    = msg->hwnd;
             msg_spy.msgs[msg_spy.i_msg].msg.message = msg->message;
@@ -94,7 +92,7 @@ static LRESULT CALLBACK call_wnd_proc_filter(int nCode, WPARAM wParam,
         CWPSTRUCT *cwp = (CWPSTRUCT*)lParam;
 
         if (((cwp->hwnd == msg_spy.hwnd || msg_spy.hwnd == NULL)) &&
-            (msg_spy.i_msg < NUMELEMS(msg_spy.msgs)))
+            (msg_spy.i_msg < ARRAY_SIZE(msg_spy.msgs)))
         {
             memcpy(&msg_spy.msgs[msg_spy.i_msg].msg, cwp, sizeof(msg_spy.msgs[0].msg));
             msg_spy.msgs[msg_spy.i_msg].post = FALSE;
@@ -126,7 +124,7 @@ static imm_msgs* msg_spy_find_next_msg(UINT message, UINT *start) {
 
     msg_spy_pump_msg_queue();
 
-    if (msg_spy.i_msg >= NUMELEMS(msg_spy.msgs))
+    if (msg_spy.i_msg >= ARRAY_SIZE(msg_spy.msgs))
         fprintf(stdout, "%s:%d: msg_spy: message buffer overflow!\n",
                 __FILE__, __LINE__);
 
@@ -1067,8 +1065,8 @@ static BOOL CALLBACK is_ime_window_proc(HWND hWnd, LPARAM param)
     static const WCHAR imeW[] = {'I','M','E',0};
     WCHAR class_nameW[16];
     HWND *ime_window = (HWND *)param;
-    if (GetClassNameW(hWnd, class_nameW, sizeof(class_nameW)/sizeof(class_nameW[0])) &&
-        !lstrcmpW(class_nameW, imeW)) {
+    if (GetClassNameW(hWnd, class_nameW, ARRAY_SIZE(class_nameW)) && !lstrcmpW(class_nameW, imeW))
+    {
         *ime_window = hWnd;
         return FALSE;
     }
@@ -1229,7 +1227,7 @@ static void test_default_ime_window_creation(void)
         { FALSE, FALSE }
     };
 
-    for (i = 0; i < sizeof(testcases)/sizeof(testcases[0]); i++)
+    for (i = 0; i < ARRAY_SIZE(testcases); i++)
     {
         thread = CreateThread(NULL, 0, test_default_ime_window_cb, &testcases[i], 0, NULL);
         ok(thread != NULL, "CreateThread failed with error %u\n", GetLastError());