diff --git a/modules/rostests/apitests/include/user32testhelpers.h b/modules/rostests/apitests/include/user32testhelpers.h
index 687af541a26..ef020ed4298 100644
--- a/modules/rostests/apitests/include/user32testhelpers.h
+++ b/modules/rostests/apitests/include/user32testhelpers.h
@@ -1,4 +1,6 @@
 
+#pragma once
+
 static __inline ATOM RegisterSimpleClass(WNDPROC lpfnWndProc, LPCWSTR lpszClassName)
 {
     WNDCLASSEXW wcex;
diff --git a/modules/rostests/apitests/user32/AttachThreadInput.c b/modules/rostests/apitests/user32/AttachThreadInput.c
index 78b461d0c61..fbba7178720 100644
--- a/modules/rostests/apitests/user32/AttachThreadInput.c
+++ b/modules/rostests/apitests/user32/AttachThreadInput.c
@@ -5,14 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-#include <msgtrace.h>
-#include <user32testhelpers.h>
-
-#define DESKTOP_ALL_ACCESS 0x01ff
+#include "precomp.h"
 
 typedef struct {
     DWORD tid;
diff --git a/modules/rostests/apitests/user32/CMakeLists.txt b/modules/rostests/apitests/user32/CMakeLists.txt
index 3b758836d41..5a0c2d1844a 100644
--- a/modules/rostests/apitests/user32/CMakeLists.txt
+++ b/modules/rostests/apitests/user32/CMakeLists.txt
@@ -38,13 +38,13 @@ list(APPEND SOURCE
     TrackMouseEvent.c
     WndProc.c
     wsprintf.c
-    testlist.c
-    user32_apitest.rc)
+    precomp.h)
 
-add_executable(user32_apitest ${SOURCE})
+add_executable(user32_apitest ${SOURCE} testlist.c user32_apitest.rc)
 target_link_libraries(user32_apitest wine ${PSEH_LIB})
 set_module_type(user32_apitest win32cui)
 add_importlibs(user32_apitest advapi32 gdi32 user32 msvcrt kernel32 ntdll)
+add_pch(user32_apitest precomp.h SOURCE)
 add_rostests_file(TARGET user32_apitest)
 
 add_rostests_file(FILE "${CMAKE_CURRENT_SOURCE_DIR}/verclasstest1.manifest")
diff --git a/modules/rostests/apitests/user32/CreateDialog.c b/modules/rostests/apitests/user32/CreateDialog.c
index dfb33a5c008..0d7d718cc0c 100644
--- a/modules/rostests/apitests/user32/CreateDialog.c
+++ b/modules/rostests/apitests/user32/CreateDialog.c
@@ -5,12 +5,7 @@
  * PROGRAMMERS:     Andreas Maier
  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 #define TEST_MAX_MSG 50
 
diff --git a/modules/rostests/apitests/user32/CreateIconFromResourceEx.c b/modules/rostests/apitests/user32/CreateIconFromResourceEx.c
index 4c5d7b7deb7..25f75c42a7c 100644
--- a/modules/rostests/apitests/user32/CreateIconFromResourceEx.c
+++ b/modules/rostests/apitests/user32/CreateIconFromResourceEx.c
@@ -1,8 +1,5 @@
 
-#include <apitest.h>
-
-#include <winuser.h>
-#include <wingdi.h>
+#include "precomp.h"
 
 START_TEST(CreateIconFromResourceEx)
 {
@@ -89,4 +86,4 @@ START_TEST(CreateIconFromResourceEx)
     ok(hcur1 == NULL, "\n");
     err = GetLastError();
     ok(err == 0x0badf00d, "err: %lu\n", err);
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/CreateWindowEx.c b/modules/rostests/apitests/user32/CreateWindowEx.c
index d377b3f0da4..24ac64d26f9 100644
--- a/modules/rostests/apitests/user32/CreateWindowEx.c
+++ b/modules/rostests/apitests/user32/CreateWindowEx.c
@@ -6,10 +6,7 @@
  *                  Mark Jansen
  */
 
-#include <apitest.h>
-#include <winuser.h>
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 static void Test_Params(void)
 {
diff --git a/modules/rostests/apitests/user32/DeferWindowPos.c b/modules/rostests/apitests/user32/DeferWindowPos.c
index 223d4894960..ad18459cf4c 100644
--- a/modules/rostests/apitests/user32/DeferWindowPos.c
+++ b/modules/rostests/apitests/user32/DeferWindowPos.c
@@ -5,12 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-
-#include <winuser.h>
-#include <undocuser.h>
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 HWND hWnd1, hWnd2, hWnd3, hWnd4;
 
diff --git a/modules/rostests/apitests/user32/DestroyCursorIcon.c b/modules/rostests/apitests/user32/DestroyCursorIcon.c
index df91a41e0de..da87d122f05 100644
--- a/modules/rostests/apitests/user32/DestroyCursorIcon.c
+++ b/modules/rostests/apitests/user32/DestroyCursorIcon.c
@@ -1,8 +1,5 @@
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 START_TEST(DestroyCursorIcon)
 {
@@ -51,4 +48,4 @@ START_TEST(DestroyCursorIcon)
     /* clean up */
     DeleteObject(iconinfo.hbmMask);
     DeleteObject(iconinfo.hbmColor);
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/DrawIconEx.c b/modules/rostests/apitests/user32/DrawIconEx.c
index b3a7cc354f3..41b1707e035 100644
--- a/modules/rostests/apitests/user32/DrawIconEx.c
+++ b/modules/rostests/apitests/user32/DrawIconEx.c
@@ -1,8 +1,5 @@
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 START_TEST(DrawIconEx)
 {
@@ -55,4 +52,4 @@ START_TEST(DrawIconEx)
     hbmp = SelectObject(hdc, hbmp);
     DeleteObject(hbmp);
     DeleteDC(hdc);
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/EmptyClipboard.c b/modules/rostests/apitests/user32/EmptyClipboard.c
index a7d0140bd7f..0536736902f 100644
--- a/modules/rostests/apitests/user32/EmptyClipboard.c
+++ b/modules/rostests/apitests/user32/EmptyClipboard.c
@@ -5,13 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 HWND hWnd1, hWnd2;
 
diff --git a/modules/rostests/apitests/user32/EnumDisplaySettings.c b/modules/rostests/apitests/user32/EnumDisplaySettings.c
index 0d058bb934b..06ee987a2cc 100644
--- a/modules/rostests/apitests/user32/EnumDisplaySettings.c
+++ b/modules/rostests/apitests/user32/EnumDisplaySettings.c
@@ -1,7 +1,5 @@
-#include <apitest.h>
 
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 #define SIZEOF_DEVMODEW_300_W 188
 #define SIZEOF_DEVMODEW_400_W 212
diff --git a/modules/rostests/apitests/user32/GetDCEx.c b/modules/rostests/apitests/user32/GetDCEx.c
index b9a183fa3b7..6900797ccbd 100644
--- a/modules/rostests/apitests/user32/GetDCEx.c
+++ b/modules/rostests/apitests/user32/GetDCEx.c
@@ -5,9 +5,7 @@
  * PROGRAMMERS:     Timo Kreuzer
  */
 
-#include <stdio.h>
-#include <wine/test.h>
-#include <windows.h>
+#include "precomp.h"
 
 #define DCX_USESTYLE 0x00010000
 
@@ -446,4 +444,3 @@ START_TEST(GetDCEx)
     Test_GetDCEx_CS_Mixed();
     Test_GetDCEx_CS_SwitchedStyle();
 }
-
diff --git a/modules/rostests/apitests/user32/GetIconInfo.c b/modules/rostests/apitests/user32/GetIconInfo.c
index 6a36ad12475..b8da5148f8b 100644
--- a/modules/rostests/apitests/user32/GetIconInfo.c
+++ b/modules/rostests/apitests/user32/GetIconInfo.c
@@ -1,10 +1,5 @@
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-
-#include "resource.h"
+#include "precomp.h"
 
 // FIXME user32
 
@@ -278,5 +273,3 @@ START_TEST(GetIconInfo)
     /* Delete cursor */
     DestroyCursor(hcursor);
 }
-
-
diff --git a/modules/rostests/apitests/user32/GetKeyState.c b/modules/rostests/apitests/user32/GetKeyState.c
index df904610624..e539bdbf918 100644
--- a/modules/rostests/apitests/user32/GetKeyState.c
+++ b/modules/rostests/apitests/user32/GetKeyState.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-
-#include <winuser.h>
-#include <assert.h>
+#include "precomp.h"
 
 HHOOK hKbdHook, hKbdLLHook;
 
@@ -133,4 +130,4 @@ void Test_GetKeyState()
 START_TEST(GetKeyState)
 {
     Test_GetKeyState();
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/GetPeekMessage.c b/modules/rostests/apitests/user32/GetPeekMessage.c
index fc107252187..b947672a15a 100644
--- a/modules/rostests/apitests/user32/GetPeekMessage.c
+++ b/modules/rostests/apitests/user32/GetPeekMessage.c
@@ -5,9 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-
-#include <winuser.h>
+#include "precomp.h"
 
 void Test_GetMessage(HWND hWnd)
 {
diff --git a/modules/rostests/apitests/user32/GetSystemMetrics.c b/modules/rostests/apitests/user32/GetSystemMetrics.c
index f969a41cc40..9e6fd3feecb 100644
--- a/modules/rostests/apitests/user32/GetSystemMetrics.c
+++ b/modules/rostests/apitests/user32/GetSystemMetrics.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Timo Kreuzer
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 void Test_GetSystemMetrics()
 {
@@ -408,4 +405,3 @@ START_TEST(GetSystemMetrics)
 {
     Test_GetSystemMetrics();
 }
-
diff --git a/modules/rostests/apitests/user32/GetUserObjectInformation.c b/modules/rostests/apitests/user32/GetUserObjectInformation.c
index e509f31e0ad..31ad4472886 100644
--- a/modules/rostests/apitests/user32/GetUserObjectInformation.c
+++ b/modules/rostests/apitests/user32/GetUserObjectInformation.c
@@ -5,9 +5,8 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
+
 #include <ndk/mmfuncs.h>
 #include <ndk/pstypes.h>
 #include <strsafe.h>
@@ -465,4 +464,4 @@ START_TEST(GetUserObjectInformation)
 {
     TestGetUserObjectInfoW();
     TestGetUserObjectInfoA();
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/GetWindowPlacement.c b/modules/rostests/apitests/user32/GetWindowPlacement.c
index c5fe2072e84..5871ef6eb59 100644
--- a/modules/rostests/apitests/user32/GetWindowPlacement.c
+++ b/modules/rostests/apitests/user32/GetWindowPlacement.c
@@ -5,8 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-#include <winuser.h>
+#include "precomp.h"
 
 #define ALIGN_DOWN_BY(size, align) \
     ((ULONG_PTR)(size) & ~((ULONG_PTR)(align) - 1))
diff --git a/modules/rostests/apitests/user32/InitializeLpkHooks.c b/modules/rostests/apitests/user32/InitializeLpkHooks.c
index 5090baa53b1..eefaf7c6091 100644
--- a/modules/rostests/apitests/user32/InitializeLpkHooks.c
+++ b/modules/rostests/apitests/user32/InitializeLpkHooks.c
@@ -5,9 +5,7 @@
  * PROGRAMMERS:     Magnus Olsen
  */
 
-#include <apitest.h>
-
-#include <winuser.h>
+#include "precomp.h"
 
 typedef struct _LPK_LPEDITCONTROL_LIST
 {
@@ -106,4 +104,3 @@ START_TEST(InitializeLpkHooks)
 {
     Test_InitializeLpkHooks();
 }
-
diff --git a/modules/rostests/apitests/user32/LoadImage.c b/modules/rostests/apitests/user32/LoadImage.c
index 39e09bd7150..586e86988ad 100644
--- a/modules/rostests/apitests/user32/LoadImage.c
+++ b/modules/rostests/apitests/user32/LoadImage.c
@@ -1,9 +1,5 @@
 
-#include <apitest.h>
-
-#include <stdio.h>
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 START_TEST(LoadImage)
 {
diff --git a/modules/rostests/apitests/user32/LookupIconIdFromDirectoryEx.c b/modules/rostests/apitests/user32/LookupIconIdFromDirectoryEx.c
index 218da48a1b1..ac1392482fa 100644
--- a/modules/rostests/apitests/user32/LookupIconIdFromDirectoryEx.c
+++ b/modules/rostests/apitests/user32/LookupIconIdFromDirectoryEx.c
@@ -1,10 +1,5 @@
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-
-#include "resource.h"
+#include "precomp.h"
 
 START_TEST(LookupIconIdFromDirectoryEx)
 {
@@ -129,4 +124,4 @@ START_TEST(LookupIconIdFromDirectoryEx)
     ok(ChangeDisplaySettingsExW(NULL, &dm, NULL, 0, NULL) == DISP_CHANGE_SUCCESSFUL, "\n");
 
     FreeResource(hMem);
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/NextDlgItem.c b/modules/rostests/apitests/user32/NextDlgItem.c
index a27ee23176c..38a0819881d 100644
--- a/modules/rostests/apitests/user32/NextDlgItem.c
+++ b/modules/rostests/apitests/user32/NextDlgItem.c
@@ -5,12 +5,8 @@
  * PROGRAMMERS:     Katayama Hirofumi MZ
  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include <apitest.h>
+#include "precomp.h"
 
-#include <wingdi.h>
-#include <winuser.h>
 #include <windowsx.h>
 #include <dlgs.h>
 
diff --git a/modules/rostests/apitests/user32/RealGetWindowClass.c b/modules/rostests/apitests/user32/RealGetWindowClass.c
index e47003f5991..856c28c71f8 100644
--- a/modules/rostests/apitests/user32/RealGetWindowClass.c
+++ b/modules/rostests/apitests/user32/RealGetWindowClass.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Gregor Gullwi
  */
 
-#include <apitest.h>
-
-#include <stdio.h>
-#include <winuser.h>
+#include "precomp.h"
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 
@@ -189,4 +186,3 @@ START_TEST(RealGetWindowClass)
     Test_ClassAtoms();
     Test_RealGetWindowClass();
 }
-
diff --git a/modules/rostests/apitests/user32/RegisterClassEx.c b/modules/rostests/apitests/user32/RegisterClassEx.c
index 8134b98c233..7a7f3456fc2 100644
--- a/modules/rostests/apitests/user32/RegisterClassEx.c
+++ b/modules/rostests/apitests/user32/RegisterClassEx.c
@@ -5,14 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-#define WIN32_NO_STATUS
-#include <ndk/rtlfuncs.h>
-
-#include <wchar.h>
-#include <wingdi.h>
-#include <winuser.h>
-#include <undocuser.h>
+#include "precomp.h"
 
 static ATOM _RegisterClass(LPCWSTR lpwszClassName, HINSTANCE hInstance, UINT style, WNDPROC lpfnWndProc)
 {
diff --git a/modules/rostests/apitests/user32/RegisterHotKey.c b/modules/rostests/apitests/user32/RegisterHotKey.c
index 529797422e5..c3901572394 100644
--- a/modules/rostests/apitests/user32/RegisterHotKey.c
+++ b/modules/rostests/apitests/user32/RegisterHotKey.c
@@ -5,12 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-
-#include <winuser.h>
-#include <shlobj.h>
-#include <undocshell.h>
-#include <undocuser.h>
+#include "precomp.h"
 
 #define msg_hotkey(msg, id, mod, vk) do                                                             \
     {                                                                                               \
diff --git a/modules/rostests/apitests/user32/ScrollDC.c b/modules/rostests/apitests/user32/ScrollDC.c
index 33bae38899a..4b3bee03e04 100644
--- a/modules/rostests/apitests/user32/ScrollDC.c
+++ b/modules/rostests/apitests/user32/ScrollDC.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Timo Kreuzer
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 void Test_ScrollDC()
 {
@@ -75,4 +72,3 @@ START_TEST(ScrollDC)
 {
     Test_ScrollDC();
 }
-
diff --git a/modules/rostests/apitests/user32/ScrollWindowEx.c b/modules/rostests/apitests/user32/ScrollWindowEx.c
index 2c0ce9679ed..4d403174aae 100644
--- a/modules/rostests/apitests/user32/ScrollWindowEx.c
+++ b/modules/rostests/apitests/user32/ScrollWindowEx.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Timo Kreuzer
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 void Test_ScrollWindowEx()
 {
@@ -61,4 +58,3 @@ START_TEST(ScrollWindowEx)
 {
     Test_ScrollWindowEx();
 }
-
diff --git a/modules/rostests/apitests/user32/SendMessageTimeout.c b/modules/rostests/apitests/user32/SendMessageTimeout.c
index 90fcc316288..e6331687323 100644
--- a/modules/rostests/apitests/user32/SendMessageTimeout.c
+++ b/modules/rostests/apitests/user32/SendMessageTimeout.c
@@ -5,11 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-#include <winuser.h>
-
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 static DWORD dwThread1;
 static DWORD dwThread2;
diff --git a/modules/rostests/apitests/user32/SetActiveWindow.c b/modules/rostests/apitests/user32/SetActiveWindow.c
index 4ba07cfd86f..110289b54b3 100644
--- a/modules/rostests/apitests/user32/SetActiveWindow.c
+++ b/modules/rostests/apitests/user32/SetActiveWindow.c
@@ -5,14 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-#include <undocuser.h>
-
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 HWND hWnd1, hWnd2;
 
diff --git a/modules/rostests/apitests/user32/SetCursorPos.c b/modules/rostests/apitests/user32/SetCursorPos.c
index 052e300e520..9ac6e2bfe0f 100644
--- a/modules/rostests/apitests/user32/SetCursorPos.c
+++ b/modules/rostests/apitests/user32/SetCursorPos.c
@@ -5,11 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-#include <assert.h>
+#include "precomp.h"
 
 HHOOK hMouseHookLL, hMouseHook;
 
diff --git a/modules/rostests/apitests/user32/SetParent.c b/modules/rostests/apitests/user32/SetParent.c
index 7ee1e406dd9..79452cb46bb 100644
--- a/modules/rostests/apitests/user32/SetParent.c
+++ b/modules/rostests/apitests/user32/SetParent.c
@@ -5,11 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-
-#include <winuser.h>
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 static HWND hWndList[5 + 1];
 static const int hWndCount = sizeof(hWndList) / sizeof(hWndList[0]) - 1;
diff --git a/modules/rostests/apitests/user32/SetProp.c b/modules/rostests/apitests/user32/SetProp.c
index de57337c230..3d656fd9936 100644
--- a/modules/rostests/apitests/user32/SetProp.c
+++ b/modules/rostests/apitests/user32/SetProp.c
@@ -5,9 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-#include <winuser.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 static ATOM Atom1, Atom2, Atom3;
 
diff --git a/modules/rostests/apitests/user32/SetScrollInfo.c b/modules/rostests/apitests/user32/SetScrollInfo.c
index 59faad01fb7..1d9d9f00c40 100644
--- a/modules/rostests/apitests/user32/SetScrollInfo.c
+++ b/modules/rostests/apitests/user32/SetScrollInfo.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 START_TEST(SetScrollInfo)
 {
diff --git a/modules/rostests/apitests/user32/SetScrollRange.c b/modules/rostests/apitests/user32/SetScrollRange.c
index f73db6bf87b..75c54797373 100644
--- a/modules/rostests/apitests/user32/SetScrollRange.c
+++ b/modules/rostests/apitests/user32/SetScrollRange.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 START_TEST(SetScrollRange)
 {
diff --git a/modules/rostests/apitests/user32/SystemParametersInfo.c b/modules/rostests/apitests/user32/SystemParametersInfo.c
index 2b845087154..64330bc79bb 100644
--- a/modules/rostests/apitests/user32/SystemParametersInfo.c
+++ b/modules/rostests/apitests/user32/SystemParametersInfo.c
@@ -5,14 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
-#include <undocuser.h>
-
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 HWND hWnd1, hWnd2;
 
@@ -193,4 +186,4 @@ START_TEST(SystemParametersInfo)
     DestroyWindow(hWnd1);
     DestroyWindow(hWnd2);
     UnregisterClassW(L"sysparamstest", 0);
-}
\ No newline at end of file
+}
diff --git a/modules/rostests/apitests/user32/TrackMouseEvent.c b/modules/rostests/apitests/user32/TrackMouseEvent.c
index 7cc76467e54..60244898422 100644
--- a/modules/rostests/apitests/user32/TrackMouseEvent.c
+++ b/modules/rostests/apitests/user32/TrackMouseEvent.c
@@ -5,13 +5,7 @@
  * PROGRAMMERS:     Giannis Adamopoulos
  */
 
-#include <apitest.h>
-#include <wingdi.h>
-#include <winuser.h>
-#include <undocuser.h>
-
-#include <msgtrace.h>
-#include <user32testhelpers.h>
+#include "precomp.h"
 
 HWND hWnd1, hWnd2, hWnd3;
 HHOOK hMouseHookLL, hMouseHook;
diff --git a/modules/rostests/apitests/user32/WndProc.c b/modules/rostests/apitests/user32/WndProc.c
index bdcff2f8d57..185726f8cc2 100644
--- a/modules/rostests/apitests/user32/WndProc.c
+++ b/modules/rostests/apitests/user32/WndProc.c
@@ -5,10 +5,7 @@
  * PROGRAMMERS:
  */
 
-#include <apitest.h>
-
-#include <wingdi.h>
-#include <winuser.h>
+#include "precomp.h"
 
 /* Used wine Redraw test for proof in principle. */
 
diff --git a/modules/rostests/apitests/user32/desktop.c b/modules/rostests/apitests/user32/desktop.c
index e20450137e5..f7bffe07215 100644
--- a/modules/rostests/apitests/user32/desktop.c
+++ b/modules/rostests/apitests/user32/desktop.c
@@ -6,18 +6,10 @@
  *                  Thomas Faber
  */
 
-#define WIN32_NO_STATUS
-#include <apitest.h>
+#include "precomp.h"
 
-#include <stdio.h>
-#include <wingdi.h>
-#include <winuser.h>
-#include <user32testhelpers.h>
-#include <ndk/umtypes.h>
 #include <ndk/obfuncs.h>
 
-#define DESKTOP_ALL_ACCESS 0x01ff
-
 struct test_info {
     WCHAR* ExpectedWinsta;
     WCHAR* ExpectedDesktp;
diff --git a/modules/rostests/apitests/user32/precomp.h b/modules/rostests/apitests/user32/precomp.h
new file mode 100644
index 00000000000..8cb2810b598
--- /dev/null
+++ b/modules/rostests/apitests/user32/precomp.h
@@ -0,0 +1,18 @@
+#ifndef _USER32_APITEST_PRECOMP_H_
+#define _USER32_APITEST_PRECOMP_H_
+
+#define WIN32_NO_STATUS
+#include <assert.h>
+#include <stdio.h>
+#include <apitest.h>
+#include <wingdi.h>
+#include <winuser.h>
+#include <msgtrace.h>
+#include <user32testhelpers.h>
+#include <undocuser.h>
+
+#include "resource.h"
+
+#define DESKTOP_ALL_ACCESS 0x01ff
+
+#endif /* _USER32_APITEST_PRECOMP_H_ */