diff --git a/rostests/apitests/user32/CMakeLists.txt b/rostests/apitests/user32/CMakeLists.txt
index a282b254781..854a4cb94c7 100644
--- a/rostests/apitests/user32/CMakeLists.txt
+++ b/rostests/apitests/user32/CMakeLists.txt
@@ -15,6 +15,7 @@ list(APPEND SOURCE
     GetPeekMessage.c
     GetSystemMetrics.c
     GetUserObjectInformation.c
+    GetWindowPlacement.c
     InitializeLpkHooks.c
     LoadImage.c
     LookupIconIdFromDirectoryEx.c
diff --git a/rostests/apitests/user32/GetWindowPlacement.c b/rostests/apitests/user32/GetWindowPlacement.c
new file mode 100644
index 00000000000..8213a96485c
--- /dev/null
+++ b/rostests/apitests/user32/GetWindowPlacement.c
@@ -0,0 +1,117 @@
+/*
+ * PROJECT:         ReactOS API tests
+ * LICENSE:         LGPLv2.1+ - See COPYING.LIB in the top level directory
+ * PURPOSE:         Test for GetWindowPlacement
+ * PROGRAMMERS:     Thomas Faber <thomas.faber@reactos.org>
+ */
+
+#include <apitest.h>
+#include <winuser.h>
+
+#define ALIGN_DOWN_BY(size, align) \
+    ((ULONG_PTR)(size) & ~((ULONG_PTR)(align) - 1))
+
+#define ALIGN_UP_BY(size, align) \
+    (ALIGN_DOWN_BY(((ULONG_PTR)(size) + align - 1), align))
+
+START_TEST(GetWindowPlacement)
+{
+    BYTE buffer[sizeof(WINDOWPLACEMENT) + 16];
+    PWINDOWPLACEMENT wp = (PVOID)buffer;
+    DWORD error;
+    BOOL ret;
+
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(NULL, NULL);
+    error = GetLastError();
+    ok(ret == FALSE, "ret = %d\n", ret);
+    ok(error == ERROR_INVALID_WINDOW_HANDLE, "error = %lu\n", error);
+
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), NULL);
+    error = GetLastError();
+    ok(ret == FALSE, "ret = %d\n", ret);
+    ok(error == ERROR_NOACCESS, "error = %lu\n", error);
+
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), (PVOID)(UINT_PTR)-4);
+    error = GetLastError();
+    ok(ret == FALSE, "ret = %d\n", ret);
+    ok(error == ERROR_NOACCESS, "error = %lu\n", error);
+
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), (PVOID)(ALIGN_UP_BY(buffer, 16) + 1));
+    error = GetLastError();
+    ok(ret == TRUE, "ret = %d\n", ret);
+    ok(error == 0xfeedfab1, "error = %lu\n", error);
+
+    FillMemory(wp, sizeof(*wp), 0x55);
+    wp->length = 0;
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(NULL, wp);
+    error = GetLastError();
+    ok(ret == FALSE, "ret = %d\n", ret);
+    ok(error == ERROR_INVALID_WINDOW_HANDLE, "error = %lu\n", error);
+    ok(wp->length == 0, "wp.length = %u\n", wp->length);
+
+    FillMemory(wp, sizeof(*wp), 0x55);
+    wp->length = 0;
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), wp);
+    error = GetLastError();
+    ok(ret == TRUE, "ret = %d\n", ret);
+    ok(error == 0xfeedfab1, "error = %lu\n", error);
+    ok(wp->length == sizeof(*wp), "wp.length = %u\n", wp->length);
+    ok(wp->flags == 0, "wp.flags = %x\n", wp->flags);
+
+    FillMemory(wp, sizeof(*wp), 0x55);
+    wp->length = 1;
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), wp);
+    error = GetLastError();
+    ok(ret == TRUE, "ret = %d\n", ret);
+    ok(error == 0xfeedfab1, "error = %lu\n", error);
+    ok(wp->length == sizeof(*wp), "wp.length = %u\n", wp->length);
+    ok(wp->flags == 0, "wp.flags = %x\n", wp->flags);
+
+    FillMemory(wp, sizeof(*wp), 0x55);
+    wp->length = sizeof(*wp) - 1;
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), wp);
+    error = GetLastError();
+    ok(ret == TRUE, "ret = %d\n", ret);
+    ok(error == 0xfeedfab1, "error = %lu\n", error);
+    ok(wp->length == sizeof(*wp), "wp.length = %u\n", wp->length);
+    ok(wp->flags == 0, "wp.flags = %x\n", wp->flags);
+
+    FillMemory(wp, sizeof(*wp), 0x55);
+    wp->length = sizeof(*wp) + 1;
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), wp);
+    error = GetLastError();
+    ok(ret == TRUE, "ret = %d\n", ret);
+    ok(error == 0xfeedfab1, "error = %lu\n", error);
+    ok(wp->length == sizeof(*wp), "wp.length = %u\n", wp->length);
+    ok(wp->flags == 0, "wp.flags = %x\n", wp->flags);
+
+    FillMemory(wp, sizeof(*wp), 0x55);
+    wp->length = sizeof(*wp);
+    SetLastError(0xfeedfab1);
+    ret = GetWindowPlacement(GetDesktopWindow(), wp);
+    error = GetLastError();
+    ok(ret == TRUE, "ret = %d\n", ret);
+    ok(error == 0xfeedfab1, "error = %lu\n", error);
+    ok(wp->length == sizeof(*wp), "wp.length = %u\n", wp->length);
+    ok(wp->flags == 0, "wp.flags = %x\n", wp->flags);
+    ok(wp->showCmd == SW_SHOWNORMAL, "wp.showCmd = %u\n", wp->showCmd);
+    ok(wp->ptMinPosition.x == (UINT)-1, "wp.ptMinPosition.x = %u\n", wp->ptMinPosition.x);
+    ok(wp->ptMinPosition.y == (UINT)-1, "wp.ptMinPosition.x = %u\n", wp->ptMinPosition.y);
+    ok(wp->ptMaxPosition.x == (UINT)-1, "wp.ptMaxPosition.x = %u\n", wp->ptMaxPosition.x);
+    ok(wp->ptMaxPosition.y == (UINT)-1, "wp.ptMaxPosition.y = %u\n", wp->ptMaxPosition.y);
+    ok(wp->rcNormalPosition.left == 0, "wp.rcNormalPosition.left = %u\n", wp->rcNormalPosition.left);
+    ok(wp->rcNormalPosition.top == 0, "wp.rcNormalPosition.top = %u\n", wp->rcNormalPosition.top);
+    ok(wp->rcNormalPosition.right != 0 &&
+       wp->rcNormalPosition.right != 0x55555555, "wp.rcNormalPosition.right = %u\n", wp->rcNormalPosition.right);
+    ok(wp->rcNormalPosition.bottom != 0 &&
+       wp->rcNormalPosition.bottom != 0x55555555, "wp.rcNormalPosition.bottom = %u\n", wp->rcNormalPosition.bottom);
+}
diff --git a/rostests/apitests/user32/testlist.c b/rostests/apitests/user32/testlist.c
index d5a8f2f6712..698a9e130e8 100644
--- a/rostests/apitests/user32/testlist.c
+++ b/rostests/apitests/user32/testlist.c
@@ -17,6 +17,7 @@ extern void func_GetKeyState(void);
 extern void func_GetPeekMessage(void);
 extern void func_GetSystemMetrics(void);
 extern void func_GetUserObjectInformation(void);
+extern void func_GetWindowPlacement(void);
 extern void func_InitializeLpkHooks(void);
 extern void func_LoadImage(void);
 extern void func_LookupIconIdFromDirectoryEx(void);
@@ -49,6 +50,7 @@ const struct test winetest_testlist[] =
     { "GetPeekMessage", func_GetPeekMessage },
     { "GetSystemMetrics", func_GetSystemMetrics },
     { "GetUserObjectInformation", func_GetUserObjectInformation },
+    { "GetWindowPlacement", func_GetWindowPlacement },
     { "InitializeLpkHooks", func_InitializeLpkHooks },
     { "LoadImage", func_LoadImage },
     { "LookupIconIdFromDirectoryEx", func_LookupIconIdFromDirectoryEx },