diff --git a/reactos/regtests/shared/regtests.c b/reactos/regtests/shared/regtests.c
index fe927b034a7..0068b41236b 100755
--- a/reactos/regtests/shared/regtests.c
+++ b/reactos/regtests/shared/regtests.c
@@ -78,8 +78,8 @@ ControlNormalTest(HANDLE hThread,
             PERFORM_TEST_ARGS *Args,
             DWORD TimeOut)
 {
-  FILETIME time;
-  FILETIME executionTime;
+  _FILETIME time;
+  _FILETIME executionTime;
   DWORD status;
 
   status = _WaitForSingleObject(hThread, TimeOut);
diff --git a/reactos/regtests/shared/regtests.h b/reactos/regtests/shared/regtests.h
index e64ac398b21..1510cf1efc1 100755
--- a/reactos/regtests/shared/regtests.h
+++ b/reactos/regtests/shared/regtests.h
@@ -9,6 +9,14 @@
 #include <stdio.h>
 #include <string.h>
 
+typedef DWORD (STDCALL _LPTHREAD_START_ROUTINE)(LPVOID lpParameter);
+
+typedef struct __FILETIME
+{
+  DWORD dwLowDateTime;
+  DWORD dwHighDateTime;
+} _FILETIME, *_PFILETIME, *_LPFILETIME;
+
 extern void SetupOnce();
 
 #define _SetupOnce() \
@@ -195,7 +203,7 @@ _ExitProcess(UINT uExitCode);
 
 HANDLE STDCALL
 _CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, DWORD dwStackSize,
-              LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter,
+              _LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter,
               DWORD dwCreationFlags, LPDWORD lpThreadId);
 
 WINBOOL STDCALL
@@ -211,9 +219,11 @@ VOID STDCALL
 _CloseHandle(HANDLE handle);
 
 BOOL STDCALL
-_GetThreadTimes(HANDLE hThread, LPFILETIME lpCreationTime,
-	            LPFILETIME lpExitTime, LPFILETIME lpKernelTime,
-	            LPFILETIME lpUserTime);
+_GetThreadTimes(HANDLE hThread,
+                _LPFILETIME lpCreationTime,
+                _LPFILETIME lpExitTime,
+                _LPFILETIME lpKernelTime,
+                _LPFILETIME lpUserTime);
 
 BOOL STDCALL
 _SetPriorityClass(HANDLE hProcess, DWORD dwPriorityClass);
diff --git a/reactos/subsys/win32k/tests/stubs.xml b/reactos/subsys/win32k/tests/stubs.xml
index 4db1e5be270..d881427172b 100644
--- a/reactos/subsys/win32k/tests/stubs.xml
+++ b/reactos/subsys/win32k/tests/stubs.xml
@@ -148,6 +148,8 @@
 	<symbol>PsGetThreadWin32Thread@4</symbol>
 	<symbol>PsEstablishWin32Callouts@4</symbol>
 	<symbol>PsSetThreadWin32Thread@8</symbol>
+	<symbol>ProbeForRead@12</symbol>
+	<symbol>ProbeForWrite@12</symbol>
 </component>
 <component name="freetype.dll">
 	<symbol>FT_Init_FreeType</symbol>
diff --git a/reactos/subsys/win32k/tests/tests/DIB_24BPP_ColorFill-performance.c b/reactos/subsys/win32k/tests/tests/DIB_24BPP_ColorFill-performance.c
index 60e4cb8ee32..5e63b0fbe0e 100644
--- a/reactos/subsys/win32k/tests/tests/DIB_24BPP_ColorFill-performance.c
+++ b/reactos/subsys/win32k/tests/tests/DIB_24BPP_ColorFill-performance.c
@@ -9,7 +9,7 @@ static void SetupSurface(SURFOBJ* surface, RECTL* rect)
   UINT size;
   UINT depth;
 
-  ZeroMemory(surface, sizeof(SURFOBJ));
+  RtlZeroMemory(surface, sizeof(SURFOBJ));
   depth = BitsPerFormat(BMF_24BPP);
   sizex = rect->right - rect->left;
   sizey = rect->bottom - rect->top;