diff --git a/dlls/ddraw/tests/d3d.c b/dlls/ddraw/tests/d3d.c
index 85925754603..d9a313e244b 100644
--- a/dlls/ddraw/tests/d3d.c
+++ b/dlls/ddraw/tests/d3d.c
@@ -23,18 +23,6 @@
 #include "ddraw.h"
 #include "d3d.h"
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-# define U1(x) (x).u1
-# define U2(x) (x).u2
-# define U3(x) (x).u3
-#else
-# define U(x)  (x)
-# define U1(x) (x)
-# define U2(x) (x)
-# define U3(x) (x)
-#endif
-
 static LPDIRECTDRAW7        lpDD = NULL;
 static LPDIRECT3D7          lpD3D = NULL;
 static LPDIRECTDRAWSURFACE7 lpDDS = NULL;
diff --git a/dlls/ddraw/tests/ddrawmodes.c b/dlls/ddraw/tests/ddrawmodes.c
index 165e8b9c528..c625d165cc0 100644
--- a/dlls/ddraw/tests/ddrawmodes.c
+++ b/dlls/ddraw/tests/ddrawmodes.c
@@ -22,12 +22,6 @@
 #include "wine/test.h"
 #include "ddraw.h"
 
-#ifdef NONAMELESSUNION
-#define UNION_MEMBER(x, y) DUMMYUNIONNAME##x.y
-#else
-#define UNION_MEMBER(x, y) y
-#endif
-
 static LPDIRECTDRAW lpDD = NULL;
 static LPDIRECTDRAWSURFACE lpDDSPrimary = NULL;
 static LPDIRECTDRAWSURFACE lpDDSBack = NULL;
@@ -100,7 +94,7 @@ HRESULT WINAPI enummodescallback(LPDDSURFACEDESC lpddsd, LPVOID lpContext)
 {
     trace("Width = %li, Height = %li, Refresh Rate = %li\r\n",
         lpddsd->dwWidth, lpddsd->dwHeight,
-        lpddsd->UNION_MEMBER(2, dwRefreshRate));
+        U2(*lpddsd).dwRefreshRate);
     adddisplaymode(lpddsd);
 
     return DDENUMRET_OK;
@@ -134,7 +128,7 @@ static void setdisplaymode(int i)
         {
             rc = IDirectDraw_SetDisplayMode(lpDD,
                 modes[i].dwWidth, modes[i].dwHeight,
-                modes[i].ddpfPixelFormat.UNION_MEMBER(1, dwRGBBitCount));
+                U1(modes[i].ddpfPixelFormat).dwRGBBitCount);
             ok(DD_OK==rc || DDERR_UNSUPPORTED==rc,"SetDisplayMode returned: %lx\n",rc);
 	    if (DD_OK==rc) {
                 rc = IDirectDraw_RestoreDisplayMode(lpDD);
diff --git a/dlls/ddraw/tests/dsurface.c b/dlls/ddraw/tests/dsurface.c
index 86390f8ad58..6cf602536be 100644
--- a/dlls/ddraw/tests/dsurface.c
+++ b/dlls/ddraw/tests/dsurface.c
@@ -22,14 +22,6 @@
 #include "wine/test.h"
 #include "ddraw.h"
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-# define U2(x) (x).u2
-#else
-# define U(x)  (x)
-# define U2(x) (x)
-#endif
-
 static LPDIRECTDRAW lpDD = NULL;
 
 static void CreateDirectDraw()
diff --git a/dlls/kernel/tests/file.c b/dlls/kernel/tests/file.c
index 5eb66aad76b..57fb11d4c27 100644
--- a/dlls/kernel/tests/file.c
+++ b/dlls/kernel/tests/file.c
@@ -28,17 +28,6 @@
 #include "winbase.h"
 #include "winerror.h"
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-#else
-# define U(x)  (x)
-#endif
-#ifdef NONAMELESSSTRUCT
-# define S(x)  (x).s
-#else
-# define S(x)  (x)
-#endif
-
 static int dll_capable(const char *dll, const char *function)
 {
     HMODULE module = GetModuleHandleA(dll);
diff --git a/dlls/ole32/tests/propvariant.c b/dlls/ole32/tests/propvariant.c
index 0f8000f64ea..0c5aa61ba38 100644
--- a/dlls/ole32/tests/propvariant.c
+++ b/dlls/ole32/tests/propvariant.c
@@ -22,12 +22,6 @@
 
 #include "wine/test.h"
 
-#ifdef NONAMELESSUNION
-# define U(x) (x).u
-#else
-# define U(x) (x)
-#endif
-
 /* invalid in all versions */
 #define PROP_INV 255
 /* valid in v0 and above (NT4+) */
diff --git a/dlls/ole32/tests/stg_prop.c b/dlls/ole32/tests/stg_prop.c
index 262151e8e7c..e0165c94d77 100644
--- a/dlls/ole32/tests/stg_prop.c
+++ b/dlls/ole32/tests/stg_prop.c
@@ -20,12 +20,6 @@
 #include "objbase.h"
 #include "wine/test.h"
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-#else
-# define U(x)  (x)
-#endif
-
 static HRESULT (WINAPI *pFmtIdToPropStgName)(const FMTID *, LPOLESTR);
 static HRESULT (WINAPI *pPropStgNameToFmtId)(const LPOLESTR, FMTID *);
 static HRESULT (WINAPI *pStgCreatePropSetStg)(IStorage *, DWORD, IPropertySetStorage **);
diff --git a/dlls/oleaut32/tests/vartest.c b/dlls/oleaut32/tests/vartest.c
index b6c4dba80bd..bd4538a553d 100644
--- a/dlls/oleaut32/tests/vartest.c
+++ b/dlls/oleaut32/tests/vartest.c
@@ -39,21 +39,6 @@
 
 static HMODULE hOleaut32;
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-# define U1(x) (x).u1
-#else
-# define U(x)  (x)
-# define U1(x) (x)
-#endif
-#ifdef NONAMELESSSTRUCT
-# define S(x)  (x).s
-# define S1(x) (x).s1
-#else
-# define S(x)  (x)
-# define S1(x) (x)
-#endif
-
 static HRESULT (WINAPI *pVarUdateFromDate)(DATE,ULONG,UDATE*);
 static HRESULT (WINAPI *pVarDateFromUdate)(UDATE*,ULONG,DATE*);
 static INT (WINAPI *pSystemTimeToVariantTime)(LPSYSTEMTIME,double*);
diff --git a/dlls/oleaut32/tests/vartype.c b/dlls/oleaut32/tests/vartype.c
index 66c50d06eb8..82433760402 100644
--- a/dlls/oleaut32/tests/vartype.c
+++ b/dlls/oleaut32/tests/vartype.c
@@ -44,21 +44,6 @@
 
 static HMODULE hOleaut32;
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-# define U1(x) (x).u1
-#else
-# define U(x)  (x)
-# define U1(x) (x)
-#endif
-#ifdef NONAMELESSSTRUCT
-# define S(x)  (x).s
-# define S1(x) (x).s1
-#else
-# define S(x)  (x)
-# define S1(x) (x)
-#endif
-
 /* Get a conversion function ptr, return if function not available */
 #define CHECKPTR(func) p##func = (void*)GetProcAddress(hOleaut32, #func); \
   if (!p##func) { \
diff --git a/dlls/urlmon/tests/url.c b/dlls/urlmon/tests/url.c
index f0ea2c00bc0..90787e3acf0 100644
--- a/dlls/urlmon/tests/url.c
+++ b/dlls/urlmon/tests/url.c
@@ -29,12 +29,6 @@
 
 #include "wine/test.h"
 
-#ifdef NONAMELESSUNION
-# define U(x)  (x).u
-#else
-# define U(x)  (x)
-#endif
-
 static const WCHAR TEST_URL_1[] = {'h','t','t','p',':','/','/','w','w','w','.','w','i','n','e','h','q','.','o','r','g','/','\0'};
 static const WCHAR TEST_PART_URL_1[] = {'/','t','e','s','t','/','\0'};
 
diff --git a/dlls/winmm/tests/mixer.c b/dlls/winmm/tests/mixer.c
index ac8656b8533..7a74210eda2 100644
--- a/dlls/winmm/tests/mixer.c
+++ b/dlls/winmm/tests/mixer.c
@@ -36,18 +36,6 @@
 
 #include "winmm_test.h"
 
-#ifdef NONAMELESSSTRUCT
-# define S1(x) (x).s1
-#else
-# define S1(x) (x)
-#endif
-
-#ifdef NONAMELESSUNION
-# define U(x) (x).u
-#else
-# define U(x) (x)
-#endif
-
 static const char * line_flags(DWORD fdwLine)
 {
     static char flags[100];
diff --git a/include/wine/test.h b/include/wine/test.h
index 1ef83b1d66c..7ac9851d2eb 100644
--- a/include/wine/test.h
+++ b/include/wine/test.h
@@ -23,6 +23,7 @@
 
 #include <stdarg.h>
 #include <windef.h>
+#include <winbase.h>
 
 /* debug level */
 extern int winetest_debug;
@@ -72,6 +73,45 @@ extern void winetest_trace( const char *msg, ... );
 #define todo_wine      todo("wine")
 
 
+#ifdef NONAMELESSUNION
+# define U(x)  (x).u
+# define U1(x) (x).u1
+# define U2(x) (x).u2
+# define U3(x) (x).u3
+# define U4(x) (x).u4
+# define U5(x) (x).u5
+# define U6(x) (x).u6
+# define U7(x) (x).u7
+# define U8(x) (x).u8
+#else
+# define U(x)  (x)
+# define U1(x) (x)
+# define U2(x) (x)
+# define U3(x) (x)
+# define U4(x) (x)
+# define U5(x) (x)
+# define U6(x) (x)
+# define U7(x) (x)
+# define U8(x) (x)
+#endif
+
+#ifdef NONAMELESSSTRUCT
+# define S(x)  (x).s
+# define S1(x) (x).s1
+# define S2(x) (x).s2
+# define S3(x) (x).s3
+# define S4(x) (x).s4
+# define S5(x) (x).s5
+#else
+# define S(x)  (x)
+# define S1(x) (x)
+# define S2(x) (x)
+# define S3(x) (x)
+# define S4(x) (x)
+# define S5(x) (x)
+#endif
+
+
 /************************************************************************/
 /* Below is the implementation of the various functions, to be included
  * directly into the generated testlist.c file.